diff --git a/asterix-algebra/pom.xml b/asterix-algebra/pom.xml
index 350734b..0a8a480 100644
--- a/asterix-algebra/pom.xml
+++ b/asterix-algebra/pom.xml
@@ -92,6 +92,12 @@
 			<version>0.0.6-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
+                <dependency>
+                        <groupId>edu.uci.ics.asterix</groupId>
+                        <artifactId>asterix-transactions</artifactId>
+                        <version>0.0.6-SNAPSHOT</version>
+                        <scope>compile</scope>
+                </dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>algebricks-compiler</artifactId>
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitPOperator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitPOperator.java
index ece3db6..5f3bb36 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitPOperator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitPOperator.java
@@ -17,7 +17,7 @@
 
 import java.util.List;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.IHyracksJobBuilder;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntime.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntime.java
index 8533e74..266fe6d 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntime.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntime.java
@@ -17,13 +17,13 @@
 
 import java.nio.ByteBuffer;
 
-import edu.uci.ics.asterix.common.context.AsterixAppRuntimeContext;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
@@ -46,7 +46,7 @@
     private final boolean isWriteTransaction;
     private final long[] longHashes; 
 
-    private TransactionContext transactionContext;
+    private ITransactionContext transactionContext;
     private RecordDescriptor inputRecordDesc;
     private FrameTupleAccessor frameTupleAccessor;
     private FrameTupleReference frameTupleReference;
@@ -54,7 +54,7 @@
     public CommitRuntime(IHyracksTaskContext ctx, JobId jobId, int datasetId, int[] primaryKeyFields,
             boolean isWriteTransaction) {
         this.hyracksTaskCtx = ctx;
-        AsterixAppRuntimeContext runtimeCtx = (AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext()
+        IAsterixAppRuntimeContext runtimeCtx = (IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext()
                 .getApplicationObject();
         this.transactionManager = runtimeCtx.getTransactionSubsystem().getTransactionManager();
         this.jobId = jobId;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntimeFactory.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntimeFactory.java
index f3b6526..39ba697 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntimeFactory.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/CommitRuntimeFactory.java
@@ -15,7 +15,7 @@
 
 package edu.uci.ics.asterix.algebra.operators.physical;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntimeFactory;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/InvertedIndexPOperator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/InvertedIndexPOperator.java
index 6edcc39..2fc9c89 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/InvertedIndexPOperator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/algebra/operators/physical/InvertedIndexPOperator.java
@@ -5,8 +5,7 @@
 
 import edu.uci.ics.asterix.common.api.AsterixAppContextInfo;
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
-import edu.uci.ics.asterix.common.dataflow.IAsterixApplicationContextInfo;
+import edu.uci.ics.asterix.common.dataflow.IStorageContext;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataManager;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
@@ -24,6 +23,7 @@
 import edu.uci.ics.asterix.optimizer.rules.am.InvertedIndexAccessMethod;
 import edu.uci.ics.asterix.optimizer.rules.am.InvertedIndexAccessMethod.SearchModifierType;
 import edu.uci.ics.asterix.optimizer.rules.am.InvertedIndexJobGenParams;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
@@ -185,7 +185,7 @@
             ITypeTraits[] invListsTypeTraits = JobGenHelper.variablesToTypeTraits(outputVars, start, numPrimaryKeys,
                     typeEnv, context);
 
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> secondarySplitsAndConstraint = metadataProvider
                     .splitProviderAndPartitionConstraintsForInternalOrFeedDataset(dataset.getDataverseName(),
                             datasetName, indexName);
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/ReplaceSinkOpWithCommitOpRule.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/ReplaceSinkOpWithCommitOpRule.java
index 30ed8e7..f277d4b 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/ReplaceSinkOpWithCommitOpRule.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/ReplaceSinkOpWithCommitOpRule.java
@@ -7,9 +7,9 @@
 
 import edu.uci.ics.asterix.algebra.operators.CommitOperator;
 import edu.uci.ics.asterix.algebra.operators.physical.CommitPOperator;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.declared.AqlDataSource;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
index 92add99..50e79a5 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
@@ -79,6 +79,7 @@
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.common.functions.FunctionConstants;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.formats.base.IDataFormat;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
 import edu.uci.ics.asterix.metadata.declared.FileSplitDataSink;
@@ -94,7 +95,6 @@
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.asterix.translator.CompiledStatements.ICompiledDmlStatement;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
diff --git a/asterix-app/pom.xml b/asterix-app/pom.xml
index 15af3bc..1c5cce7 100644
--- a/asterix-app/pom.xml
+++ b/asterix-app/pom.xml
@@ -182,6 +182,12 @@
                         <type>test-jar</type>
                         <scope>test</scope>
                 </dependency>
+                <dependency>
+                        <groupId>edu.uci.ics.asterix</groupId>
+                        <artifactId>asterix-transactions</artifactId>
+                        <version>0.0.6-SNAPSHOT</version>
+                        <scope>compile</scope>
+                </dependency>
 		<dependency>
 			<groupId>org.apache.hadoop</groupId>
 			<artifactId>hadoop-core</artifactId>
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
index e1114eb..46bdce0 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.asterix.common.api.AsterixAppContextInfo;
 import edu.uci.ics.asterix.common.config.AsterixCompilerProperties;
 import edu.uci.ics.asterix.common.config.OptimizationConfUtil;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.dataflow.data.common.AqlExpressionTypeComputer;
 import edu.uci.ics.asterix.dataflow.data.common.AqlMergeAggregationExpressionFactory;
@@ -42,7 +43,6 @@
 import edu.uci.ics.asterix.metadata.entities.Dataverse;
 import edu.uci.ics.asterix.optimizer.base.RuleCollections;
 import edu.uci.ics.asterix.runtime.job.listener.JobEventListenerFactory;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.service.transaction.JobIdFactory;
 import edu.uci.ics.asterix.translator.AqlExpressionToPlanTranslator;
 import edu.uci.ics.asterix.translator.CompiledStatements.ICompiledDmlStatement;
@@ -220,7 +220,7 @@
 
         }
 
-        edu.uci.ics.asterix.transaction.management.service.transaction.JobId asterixJobId = JobIdFactory
+        edu.uci.ics.asterix.common.transactions.JobId asterixJobId = JobIdFactory
                 .generateJobId();
         queryMetadataProvider.setJobId(asterixJobId);
         AqlExpressionToPlanTranslator t = new AqlExpressionToPlanTranslator(queryMetadataProvider, varCounter,
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContext.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
similarity index 87%
rename from asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContext.java
rename to asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
index 8fe3341..65eae64 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContext.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
@@ -1,8 +1,9 @@
-package edu.uci.ics.asterix.common.context;
+package edu.uci.ics.asterix.api.common;
 
 import java.io.IOException;
 import java.util.logging.Logger;
 
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.common.config.AsterixCompilerProperties;
 import edu.uci.ics.asterix.common.config.AsterixExternalProperties;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
@@ -10,15 +11,18 @@
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.AsterixTransactionProperties;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
+import edu.uci.ics.asterix.common.context.AsterixFileMapManager;
+import edu.uci.ics.asterix.common.context.ConstantMergePolicy;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMBTreeIOOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMInvertedIndexIOOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMRTreeIOOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.IndexOperationTrackerFactory;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceRepository;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceRepositoryFactory;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
@@ -26,7 +30,6 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
-import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
@@ -46,7 +49,11 @@
 import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactoryProvider;
 
-public class AsterixAppRuntimeContext implements IAsterixPropertiesProvider {
+public class AsterixAppRuntimeContext implements IAsterixAppRuntimeContext,  IAsterixPropertiesProvider {
+    private static final int DEFAULT_BUFFER_CACHE_PAGE_SIZE = 32768;
+    private static final int DEFAULT_LIFECYCLEMANAGER_MEMORY_BUDGET = 1024 * 1024 * 1024; // 1GB
+    private static final int DEFAULT_MAX_OPEN_FILES = Integer.MAX_VALUE;
+
     private final INCApplicationContext ncApplicationContext;
 
     private AsterixCompilerProperties compilerProperties;
@@ -58,14 +65,14 @@
     private IIndexLifecycleManager indexLifecycleManager;
     private IFileMapManager fileMapManager;
     private IBufferCache bufferCache;
-    private TransactionSubsystem txnSubsystem;
+    private ITransactionSubsystem txnSubsystem;
 
     private ILSMMergePolicy mergePolicy;
     private ILSMOperationTrackerFactory lsmBTreeOpTrackerFactory;
     private ILSMOperationTrackerFactory lsmRTreeOpTrackerFactory;
     private ILSMOperationTrackerFactory lsmInvertedIndexOpTrackerFactory;
     private ILSMIOOperationScheduler lsmIOScheduler;
-    private PersistentLocalResourceRepository localResourceRepository;
+    private ILocalResourceRepository localResourceRepository;
     private ResourceIdFactory resourceIdFactory;
     private IIOManager ioManager;
     private boolean isShuttingdown;
@@ -137,7 +144,7 @@
         return fileMapManager;
     }
 
-    public TransactionSubsystem getTransactionSubsystem() {
+    public ITransactionSubsystem getTransactionSubsystem() {
         return txnSubsystem;
     }
 
@@ -165,22 +172,6 @@
         return lsmInvertedIndexOpTrackerFactory;
     }
 
-    public ILSMIOOperationCallbackProvider getLSMBTreeIOOperationCallbackProvider() {
-        return AsterixRuntimeComponentsProvider.LSMBTREE_PROVIDER;
-    }
-
-    public ILSMIOOperationCallbackProvider getLSMRTreeIOOperationCallbackProvider() {
-        return AsterixRuntimeComponentsProvider.LSMRTREE_PROVIDER;
-    }
-
-    public ILSMIOOperationCallbackProvider getLSMInvertedIndexIOOperationCallbackProvider() {
-        return AsterixRuntimeComponentsProvider.LSMINVERTEDINDEX_PROVIDER;
-    }
-
-    public ILSMIOOperationCallbackProvider getNoOpIOOperationCallbackProvider() {
-        return AsterixRuntimeComponentsProvider.NOINDEX_PROVIDER;
-    }
-
     public ILSMIOOperationScheduler getLSMIOScheduler() {
         return lsmIOScheduler;
     }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContextProviderForRecovery.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContextProviderForRecovery.java
similarity index 83%
rename from asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContextProviderForRecovery.java
rename to asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContextProviderForRecovery.java
index 10660cc..8c73a63 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixAppRuntimeContextProviderForRecovery.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContextProviderForRecovery.java
@@ -1,7 +1,7 @@
-package edu.uci.ics.asterix.common.context;
+package edu.uci.ics.asterix.api.common;
 
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.hyracks.api.io.IIOManager;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
@@ -32,7 +32,7 @@
     }
 
     @Override
-    public TransactionSubsystem getTransactionSubsystem() {
+    public ITransactionSubsystem getTransactionSubsystem() {
         return asterixAppRuntimeContext.getTransactionSubsystem();
     }
 
@@ -88,21 +88,26 @@
 
     @Override
     public ILSMIOOperationCallbackProvider getLSMBTreeIOOperationCallbackProvider() {
-        return asterixAppRuntimeContext.getLSMBTreeIOOperationCallbackProvider();
+        // TODO Auto-generated method stub
+        return null;
     }
 
     @Override
     public ILSMIOOperationCallbackProvider getLSMRTreeIOOperationCallbackProvider() {
-        return asterixAppRuntimeContext.getLSMRTreeIOOperationCallbackProvider();
+        // TODO Auto-generated method stub
+        return null;
     }
 
     @Override
     public ILSMIOOperationCallbackProvider getLSMInvertedIndexIOOperationCallbackProvider() {
-        return asterixAppRuntimeContext.getLSMInvertedIndexIOOperationCallbackProvider();
+        // TODO Auto-generated method stub
+        return null;
     }
 
     @Override
     public ILSMIOOperationCallbackProvider getNoOpIOOperationCallbackProvider() {
-        return asterixAppRuntimeContext.getNoOpIOOperationCallbackProvider();
+        // TODO Auto-generated method stub
+        return null;
     }
+
 }
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
index 12fa51a..e729742 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
@@ -13,13 +13,23 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import edu.uci.ics.asterix.api.common.APIFramework;
 import edu.uci.ics.asterix.api.common.APIFramework.DisplayFormat;
+import edu.uci.ics.asterix.api.common.Job;
 import edu.uci.ics.asterix.api.common.SessionConfig;
 import edu.uci.ics.asterix.aql.base.Statement;
 import edu.uci.ics.asterix.aql.parser.AQLParser;
 import edu.uci.ics.asterix.aql.parser.ParseException;
 import edu.uci.ics.asterix.aql.parser.TokenMgrError;
 import edu.uci.ics.asterix.aql.translator.AqlTranslator;
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.metadata.MetadataManager;
+import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.asterix.api.common.APIFramework.DisplayFormat;
+import edu.uci.ics.asterix.api.common.SessionConfig;
+import edu.uci.ics.asterix.aql.base.Statement;
+import edu.uci.ics.asterix.aql.translator.AqlTranslator;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
 import edu.uci.ics.asterix.metadata.MetadataManager;
 import edu.uci.ics.asterix.result.ResultReader;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
index 2c15578..2cfa59e 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
@@ -30,8 +30,6 @@
 import edu.uci.ics.asterix.api.common.SessionConfig;
 import edu.uci.ics.asterix.aql.base.Statement;
 import edu.uci.ics.asterix.aql.base.Statement.Kind;
-import edu.uci.ics.asterix.aql.parser.AQLParser;
-import edu.uci.ics.asterix.aql.parser.ParseException;
 import edu.uci.ics.asterix.aql.translator.AqlTranslator;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
 import edu.uci.ics.asterix.metadata.MetadataManager;
@@ -40,6 +38,18 @@
 import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
 import edu.uci.ics.hyracks.api.dataset.IHyracksDataset;
 import edu.uci.ics.hyracks.client.dataset.HyracksDataset;
+import edu.uci.ics.asterix.api.common.APIFramework;
+import edu.uci.ics.asterix.api.common.APIFramework.DisplayFormat;
+import edu.uci.ics.asterix.api.common.Job;
+import edu.uci.ics.asterix.api.common.SessionConfig;
+import edu.uci.ics.asterix.aql.base.Statement;
+import edu.uci.ics.asterix.aql.parser.AQLParser;
+import edu.uci.ics.asterix.aql.parser.ParseException;
+import edu.uci.ics.asterix.aql.translator.AqlTranslator;
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.metadata.MetadataManager;
+import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
 
 abstract class RESTAPIServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/java/AsterixJavaClient.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/java/AsterixJavaClient.java
index cb786d7..0fbe9fa 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/java/AsterixJavaClient.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/java/AsterixJavaClient.java
@@ -9,6 +9,11 @@
 import edu.uci.ics.asterix.api.common.Job;
 import edu.uci.ics.asterix.api.common.SessionConfig;
 import edu.uci.ics.asterix.aql.base.Statement;
+import edu.uci.ics.asterix.aql.translator.AqlTranslator;
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.metadata.MetadataManager;
+import edu.uci.ics.hyracks.api.client.IHyracksClientConnection;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.asterix.aql.parser.AQLParser;
 import edu.uci.ics.asterix.aql.parser.ParseException;
 import edu.uci.ics.asterix.aql.translator.AqlTranslator;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
index d4e5e22..e84dedf 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
@@ -62,6 +62,7 @@
 import edu.uci.ics.asterix.aql.util.FunctionUtils;
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.file.DatasetOperations;
@@ -90,7 +91,6 @@
 import edu.uci.ics.asterix.om.types.TypeSignature;
 import edu.uci.ics.asterix.result.ResultReader;
 import edu.uci.ics.asterix.result.ResultUtils;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetIdFactory;
 import edu.uci.ics.asterix.translator.AbstractAqlTranslator;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledBeginFeedStatement;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/DatasetOperations.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/DatasetOperations.java
index 3600bea..612d523 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/DatasetOperations.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/DatasetOperations.java
@@ -27,7 +27,7 @@
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
 import edu.uci.ics.asterix.common.config.OptimizationConfUtil;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.formats.base.IDataFormat;
 import edu.uci.ics.asterix.metadata.MetadataManager;
@@ -40,10 +40,10 @@
 import edu.uci.ics.asterix.metadata.utils.DatasetUtils;
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.LSMBTreeLocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceFactoryProvider;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledDatasetDropStatement;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledLoadFromFileStatement;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/IndexOperations.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/IndexOperations.java
index 67bdabb..b0a0177 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/IndexOperations.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/IndexOperations.java
@@ -3,10 +3,10 @@
 import edu.uci.ics.asterix.common.api.AsterixAppContextInfo;
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.OptimizationConfUtil;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledCreateIndexStatement;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledIndexDropStatement;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryBTreeCreator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryBTreeCreator.java
index c3a2c01..fb83871 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryBTreeCreator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryBTreeCreator.java
@@ -2,11 +2,11 @@
 
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.LSMBTreeLocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceFactoryProvider;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraintHelper;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.jobgen.impl.ConnectorPolicyAssignmentPolicy;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryIndexCreator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryIndexCreator.java
index 253df4b..5a7de34 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryIndexCreator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryIndexCreator.java
@@ -23,7 +23,6 @@
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.formats.nontagged.AqlBinaryBooleanInspectorImpl;
 import edu.uci.ics.asterix.formats.nontagged.AqlBinaryComparatorFactoryProvider;
@@ -40,6 +39,7 @@
 import edu.uci.ics.asterix.runtime.evaluators.functions.AndDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.IsNullDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.NotDescriptor;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledCreateIndexStatement;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraintHelper;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryInvertedIndexCreator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryInvertedIndexCreator.java
index 366e247..a2e28da 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryInvertedIndexCreator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryInvertedIndexCreator.java
@@ -5,7 +5,6 @@
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
 import edu.uci.ics.asterix.metadata.entities.Index;
@@ -15,6 +14,7 @@
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.LSMInvertedIndexLocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceFactoryProvider;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledCreateIndexStatement;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraintHelper;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryRTreeCreator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryRTreeCreator.java
index 89a59e8..ad61cbe 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryRTreeCreator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/file/SecondaryRTreeCreator.java
@@ -4,7 +4,6 @@
 
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.dataflow.data.nontagged.valueproviders.AqlPrimitiveValueProviderFactory;
 import edu.uci.ics.asterix.formats.nontagged.AqlBinaryComparatorFactoryProvider;
@@ -18,6 +17,7 @@
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.LSMRTreeLocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceFactoryProvider;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.translator.CompiledStatements.CompiledCreateIndexStatement;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraintHelper;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
index 01cbca0..2ac6051 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
@@ -14,6 +14,7 @@
 import edu.uci.ics.asterix.api.http.servlet.QueryStatusAPIServlet;
 import edu.uci.ics.asterix.api.http.servlet.UpdateAPIServlet;
 import edu.uci.ics.asterix.common.api.AsterixAppContextInfo;
+import edu.uci.ics.asterix.common.api.AsterixContextInfo;
 import edu.uci.ics.asterix.common.config.AsterixExternalProperties;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
 import edu.uci.ics.asterix.metadata.MetadataManager;
@@ -54,6 +55,8 @@
         webServer.start();
         setupJSONAPIServer(externalProperties);
         jsonAPIServer.start();
+
+        AsterixContextInfo.initialize(ccAppCtx);
     }
 
     @Override
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
index 7dad984..4569088 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
@@ -5,16 +5,18 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import edu.uci.ics.asterix.api.common.AsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
-import edu.uci.ics.asterix.common.context.AsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager.SystemState;
 import edu.uci.ics.asterix.metadata.MetadataManager;
 import edu.uci.ics.asterix.metadata.MetadataNode;
 import edu.uci.ics.asterix.metadata.api.IAsterixStateProxy;
 import edu.uci.ics.asterix.metadata.api.IMetadataNode;
 import edu.uci.ics.asterix.metadata.bootstrap.MetadataBootstrap;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceRepository;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager.SystemState;
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
 
@@ -22,7 +24,7 @@
     private static final Logger LOGGER = Logger.getLogger(NCApplicationEntryPoint.class.getName());
 
     private INCApplicationContext ncApplicationContext = null;
-    private AsterixAppRuntimeContext runtimeContext;
+    private IAsterixAppRuntimeContext runtimeContext;
     private String nodeId;
     private boolean isMetadataNode = false;
     private boolean stopInitiated = false;
@@ -87,7 +89,7 @@
     @Override
     public void notifyStartupComplete() throws Exception {
         IAsterixStateProxy proxy = (IAsterixStateProxy) ncApplicationContext.getDistributedState();
-        AsterixMetadataProperties metadataProperties = runtimeContext.getMetadataProperties();
+        AsterixMetadataProperties metadataProperties = ((IAsterixPropertiesProvider)runtimeContext).getMetadataProperties();
 
         if (systemState == SystemState.NEW_UNIVERSE) {
             if (LOGGER.isLoggable(Level.INFO)) {
@@ -111,7 +113,7 @@
             }
             MetadataManager.INSTANCE = new MetadataManager(proxy, metadataProperties);
             MetadataManager.INSTANCE.init();
-            MetadataBootstrap.startUniverse(runtimeContext, ncApplicationContext,
+            MetadataBootstrap.startUniverse( ((IAsterixPropertiesProvider)runtimeContext), ncApplicationContext,
                     systemState == SystemState.NEW_UNIVERSE);
             MetadataBootstrap.startDDLRecovery();
         }
diff --git a/asterix-common/pom.xml b/asterix-common/pom.xml
index 1a0e782..db20c29 100644
--- a/asterix-common/pom.xml
+++ b/asterix-common/pom.xml
@@ -99,13 +99,6 @@
 			<version>3.0.1</version>
 		</dependency>
 		<dependency>
-			<groupId>edu.uci.ics.asterix</groupId>
-			<artifactId>asterix-transactions</artifactId>
-			<version>0.0.6-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-common</artifactId>
 		</dependency>
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixAppContextInfo.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixAppContextInfo.java
index 06a1c1f..bcb8068 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixAppContextInfo.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixAppContextInfo.java
@@ -23,19 +23,15 @@
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.AsterixTransactionProperties;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
-import edu.uci.ics.asterix.common.dataflow.IAsterixApplicationContextInfo;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 /*
  * Acts as an holder class for IndexRegistryProvider, AsterixStorageManager
  * instances that are accessed from the NCs. In addition an instance of ICCApplicationContext 
  * is stored for access by the CC.
  */
-public class AsterixAppContextInfo implements IAsterixApplicationContextInfo, IAsterixPropertiesProvider {
+public class AsterixAppContextInfo implements IAsterixContextInfo, IAsterixPropertiesProvider {
 
     private static AsterixAppContextInfo INSTANCE;
 
@@ -70,21 +66,11 @@
     }
 
     @Override
-    public IStorageManagerInterface getStorageManagerInterface() {
-        return AsterixRuntimeComponentsProvider.NOINDEX_PROVIDER;
-    }
-
-    @Override
     public ICCApplicationContext getCCApplicationContext() {
         return appCtx;
     }
 
     @Override
-    public IIndexLifecycleManagerProvider getIndexLifecycleManagerProvider() {
-        return AsterixRuntimeComponentsProvider.NOINDEX_PROVIDER;
-    }
-
-    @Override
     public AsterixStorageProperties getStorageProperties() {
         return storageProperties;
     }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixContextInfo.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixContextInfo.java
new file mode 100644
index 0000000..969aa65
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixContextInfo.java
@@ -0,0 +1,26 @@
+package edu.uci.ics.asterix.common.api;
+
+import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
+
+public class AsterixContextInfo implements IAsterixContextInfo {
+
+    public static AsterixContextInfo INSTANCE;
+
+    private final ICCApplicationContext appCtx;
+
+    public static void initialize(ICCApplicationContext ccAppCtx) {
+        if (INSTANCE == null) {
+            INSTANCE = new AsterixContextInfo(ccAppCtx);
+        }
+    }
+
+    private AsterixContextInfo(ICCApplicationContext ccAppCtx) {
+        this.appCtx = ccAppCtx;
+    }
+
+    @Override
+    public ICCApplicationContext getCCApplicationContext() {
+        return appCtx;
+    }
+
+}
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixAppRuntimeContext.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixAppRuntimeContext.java
new file mode 100644
index 0000000..7892cc8
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixAppRuntimeContext.java
@@ -0,0 +1,54 @@
+package edu.uci.ics.asterix.common.api;
+
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.config.AsterixCompilerProperties;
+import edu.uci.ics.asterix.common.config.AsterixExternalProperties;
+import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
+import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
+import edu.uci.ics.asterix.common.config.AsterixTransactionProperties;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationScheduler;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMMergePolicy;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMOperationTrackerFactory;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
+import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
+
+public interface IAsterixAppRuntimeContext {
+
+    public ITransactionSubsystem getTransactionSubsystem();
+
+    public boolean isShuttingdown();
+
+    public ILSMIOOperationScheduler getLSMIOScheduler();
+
+    public ILSMMergePolicy getLSMMergePolicy();
+
+    public IBufferCache getBufferCache();
+
+    public IFileMapProvider getFileMapManager();
+
+    public ILocalResourceRepository getLocalResourceRepository();
+
+    public IIndexLifecycleManager getIndexLifecycleManager();
+
+    public ResourceIdFactory getResourceIdFactory();
+
+    public ILSMOperationTrackerFactory getLSMBTreeOperationTrackerFactory();
+
+    public void initialize() throws IOException, ACIDException, AsterixException;
+
+    public void setShuttingdown(boolean b);
+
+    public void deinitialize() throws HyracksDataException;
+    
+    public double getBloomFilterFalsePositiveRate();
+    
+
+}
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixContextInfo.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixContextInfo.java
new file mode 100644
index 0000000..d3c7ef3
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixContextInfo.java
@@ -0,0 +1,13 @@
+package edu.uci.ics.asterix.common.api;
+
+import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
+
+public interface IAsterixContextInfo {
+
+    /**
+     * Returns an instance of the implementation for ICCApplicationContext.
+     * 
+     * @return ICCApplicationContext implementation instance
+     */
+    public ICCApplicationContext getCCApplicationContext();
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixRuntimeComponentsProvider.java
similarity index 85%
copy from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java
copy to asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixRuntimeComponentsProvider.java
index d96d5c2..d03b15c 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/IAsterixRuntimeComponentsProvider.java
@@ -1,6 +1,5 @@
-package edu.uci.ics.asterix.transaction.management.service.recovery;
+package edu.uci.ics.asterix.common.api;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.io.IIOManager;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
@@ -12,14 +11,12 @@
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
 import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
-public interface IAsterixAppRuntimeContextProvider {
+public interface IAsterixRuntimeComponentsProvider {
 
     public IBufferCache getBufferCache();
 
     public IFileMapProvider getFileMapManager();
 
-    public TransactionSubsystem getTransactionSubsystem();
-
     public IIndexLifecycleManager getIndexLifecycleManager();
 
     public double getBloomFilterFalsePositiveRate();
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ConstantMergePolicy.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ConstantMergePolicy.java
index 74b0aa6..2daed08 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ConstantMergePolicy.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ConstantMergePolicy.java
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.asterix.common.context;
 
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
 import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
@@ -26,9 +27,9 @@
 public class ConstantMergePolicy implements ILSMMergePolicy {
 
     private final int threshold;
-    private final AsterixAppRuntimeContext ctx;
+    private final IAsterixAppRuntimeContext ctx;
 
-    public ConstantMergePolicy(int threshold, AsterixAppRuntimeContext ctx) {
+    public ConstantMergePolicy(int threshold, IAsterixAppRuntimeContext ctx) {
         this.threshold = threshold;
         this.ctx = ctx;
     }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionSubsystemProvider.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ITransactionSubsystemProvider.java
similarity index 79%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionSubsystemProvider.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ITransactionSubsystemProvider.java
index 857d8ae..a95890b 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionSubsystemProvider.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/ITransactionSubsystemProvider.java
@@ -13,12 +13,13 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.service.transaction;
+package edu.uci.ics.asterix.common.context;
 
 import java.io.Serializable;
 
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 
 public interface ITransactionSubsystemProvider extends Serializable{
-    public TransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx);
+    public ITransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx);
 }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/TransactionSubsystemProvider.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/TransactionSubsystemProvider.java
index 85e5375..33f20f7 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/TransactionSubsystemProvider.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/TransactionSubsystemProvider.java
@@ -15,8 +15,8 @@
 
 package edu.uci.ics.asterix.common.context;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 
 /**
@@ -26,8 +26,8 @@
  */
 public class TransactionSubsystemProvider implements ITransactionSubsystemProvider {
     @Override
-    public TransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx) {
-        AsterixAppRuntimeContext runtimeCtx = (AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext()
+    public ITransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx) {
+        IAsterixAppRuntimeContext runtimeCtx = (IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext()
                 .getApplicationObject();
         return runtimeCtx.getTransactionSubsystem();
     }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IAsterixApplicationContextInfo.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IStorageContext.java
similarity index 78%
rename from asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IAsterixApplicationContextInfo.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IStorageContext.java
index 401af28..8b89e4a 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IAsterixApplicationContextInfo.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/dataflow/IStorageContext.java
@@ -14,7 +14,6 @@
  */
 package edu.uci.ics.asterix.common.dataflow;
 
-import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
@@ -22,7 +21,7 @@
  * Provides methods for obtaining the IIndexRegistryProvider, IStorageManager and
  * ICCApplicationContext implementation.
  */
-public interface IAsterixApplicationContextInfo {
+public interface IStorageContext {
     public IIndexLifecycleManagerProvider getIndexLifecycleManagerProvider();
 
     /**
@@ -31,11 +30,5 @@
      * @return IStorageManagerInterface implementation instance
      */
     public IStorageManagerInterface getStorageManagerInterface();
-
-    /**
-     * Returns an instance of the implementation for ICCApplicationContext.
-     * 
-     * @return ICCApplicationContext implementation instance
-     */
-    public ICCApplicationContext getCCApplicationContext();
+   
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/exception/ACIDException.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/exceptions/ACIDException.java
similarity index 74%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/exception/ACIDException.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/exceptions/ACIDException.java
index 2bc9935..eb00d10 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/exception/ACIDException.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/exceptions/ACIDException.java
@@ -12,14 +12,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.exception;
+package edu.uci.ics.asterix.common.exceptions;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 
 /**
  * Represents an exception related to an unexpected behavior that prevents the
  * system from supporting ACID guarantees. The exception contains the
- * TransactionContext but it may not always be set. For example, an
+ * ITransactionContext but it may not always be set. For example, an
  * ACIDException encountered during crash recovery shall not have a transaction
  * context as recovery does not happen as part of a transaction.
  */
@@ -29,22 +29,22 @@
 	 * 
 	 */
     private static final long serialVersionUID = -8855848112541877323L;
-    private TransactionContext txnContext;
+    private ITransactionContext txnContext;
 
-    public TransactionContext getTxnContext() {
+    public ITransactionContext getTxnContext() {
         return txnContext;
     }
 
-    public void setTxnContext(TransactionContext txnContext) {
+    public void setTxnContext(ITransactionContext txnContext) {
         this.txnContext = txnContext;
     }
 
-    public ACIDException(TransactionContext txnContext, String message) {
+    public ACIDException(ITransactionContext txnContext, String message) {
         super(message);
         this.txnContext = txnContext;
     }
 
-    public ACIDException(TransactionContext txnContext, String message, Throwable cause) {
+    public ACIDException(ITransactionContext txnContext, String message, Throwable cause) {
         super(message, cause);
         this.txnContext = txnContext;
     }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallback.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallback.java
similarity index 74%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallback.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallback.java
index fdbb707..dc7b543 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallback.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallback.java
@@ -13,41 +13,34 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.opcallbacks;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.bloomfilter.impls.MurmurHash128Bit;
 
 public abstract class AbstractOperationCallback {
-    
+
     private final static long SEED = 0L;
-    
+
     protected final DatasetId datasetId;
     protected final int[] primaryKeyFields;
+    protected final ITransactionContext txnCtx;
     protected final ILockManager lockManager;
-    protected final TransactionContext txnCtx;
     protected int transactorLocalNumActiveOperations = 0;
     protected final long[] longHashes;
 
-    public AbstractOperationCallback(int datasetId, int[] primaryKeyFields,
-            TransactionContext txnCtx, ILockManager lockManager) {
+    public AbstractOperationCallback(int datasetId, int[] primaryKeyFields, ITransactionContext txnCtx,
+            ILockManager lockManager) {
         this.datasetId = new DatasetId(datasetId);
         this.primaryKeyFields = primaryKeyFields;
         this.txnCtx = txnCtx;
         this.lockManager = lockManager;
-        this.longHashes= new long[2];
+        this.longHashes = new long[2];
     }
 
     public int computePrimaryKeyHashValue(ITupleReference tuple, int[] primaryKeyFields) {
         MurmurHash128Bit.hash3_x64_128(tuple, primaryKeyFields, SEED, longHashes);
-        return Math.abs((int) longHashes[0]); 
-    }
-
-    public TransactionContext getTransactionContext() {
-        return txnCtx;
+        return Math.abs((int) longHashes[0]);
     }
 
     public int getLocalNumActiveOperations() {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallbackFactory.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallbackFactory.java
similarity index 85%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallbackFactory.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallbackFactory.java
index 386dce5..5c0d5f1 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/AbstractOperationCallbackFactory.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/AbstractOperationCallbackFactory.java
@@ -13,12 +13,12 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.opcallbacks;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.Serializable;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.transactions.JobId;
 
 public abstract class AbstractOperationCallbackFactory implements Serializable {
     private static final long serialVersionUID = 1L;
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/Buffer.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/Buffer.java
new file mode 100644
index 0000000..d70288f
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/Buffer.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.common.transactions;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+/**
+ * Represents a wrapper over @see ByteBuffer supporting some custom APIs for
+ * transaction support. This class is not "thread-safe". For performance
+ * concerns, it is required for multiple writers to be able to write to the
+ * buffer concurrently and that a writer is never blocked by another writer. The
+ * users of this class must ensure that two concurrent writers get to write in
+ * exclusive areas in the buffer. A reader and writer may or may not conflict
+ * with each other. For example, reading of logs during roll back of a
+ * transaction t1 does not conflict with writing of logs by another transaction
+ * t2 as they are concerned with exclusive areas of the buffer. On the contrary,
+ * a flushing the buffer to disk conflicts with a reader reading the buffer.
+ * Appropriate locks are taken on the Buffer in the application logic and not
+ * directly imposed by synchronized methods.
+ */
+
+public class Buffer implements IBuffer {
+
+    ByteBuffer buffer;
+
+    public Buffer(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
+
+    protected Buffer() {
+    }
+
+    public void setBuffer(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
+
+    @Override
+    public byte getByte(int offset) {
+        return buffer.get(offset);
+    }
+
+    @Override
+    public byte getByte() {
+        return buffer.get();
+    }
+
+    @Override
+    public void getBytes(byte[] bytes, int offset, int size) {
+        System.arraycopy(buffer.array(), offset, bytes, 0, size);
+    }
+
+    @Override
+    public int getSize() {
+        return buffer.capacity();
+    }
+
+    @Override
+    public int readInt() {
+        return buffer.getInt();
+    }
+
+    @Override
+    public int readInt(int offset) {
+        return buffer.getInt(offset);
+    }
+
+    @Override
+    public long readLong(int offset) {
+        return buffer.getLong(offset);
+    }
+
+    @Override
+    public void put(byte b) {
+        buffer.put(b);
+    }
+
+    @Override
+    public void put(int offset, byte b) {
+        buffer.put(offset, b);
+    }
+
+    @Override
+    public void put(byte[] bytes, int start, int length) {
+        buffer.put(bytes, start, length);
+
+    }
+
+    @Override
+    public void put(byte[] bytes) {
+        buffer.put(bytes);
+    }
+
+    @Override
+    public void writeInt(int value) {
+        buffer.putInt(value);
+    }
+
+    @Override
+    public void writeInt(int offset, int value) {
+        buffer.putInt(offset, value);
+
+    }
+
+    @Override
+    public void writeLong(long value) {
+        buffer.putLong(value);
+    }
+
+    @Override
+    public void writeLong(int offset, long value) {
+        buffer.putLong(offset, value);
+
+    }
+
+    @Override
+    public byte[] getArray() {
+        return buffer.array();
+    }
+
+    @Override
+    public void erase() {
+        Arrays.fill(buffer.array(), (byte) 0);
+    }
+
+    @Override
+    public ByteBuffer getByteBuffer() {
+        return buffer;
+    }
+
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/DatasetId.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/DatasetId.java
similarity index 80%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/DatasetId.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/DatasetId.java
index 9aded2a..9f964f1 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/DatasetId.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/DatasetId.java
@@ -1,8 +1,12 @@
-package edu.uci.ics.asterix.transaction.management.service.transaction;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.Serializable;
 
 public class DatasetId implements Serializable {
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 1L;
     int id;
 
     public DatasetId(int id) {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileBasedBuffer.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileBasedBuffer.java
similarity index 98%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileBasedBuffer.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileBasedBuffer.java
index e88d74e..0e80817 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileBasedBuffer.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileBasedBuffer.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.File;
 import java.io.IOException;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileUtil.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileUtil.java
similarity index 95%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileUtil.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileUtil.java
index 46e03f1..2ba0a08 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/FileUtil.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/FileUtil.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.File;
 import java.io.IOException;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IAsterixAppRuntimeContextProvider.java
similarity index 88%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IAsterixAppRuntimeContextProvider.java
index d96d5c2..f762b16 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IAsterixAppRuntimeContextProvider.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IAsterixAppRuntimeContextProvider.java
@@ -1,6 +1,5 @@
-package edu.uci.ics.asterix.transaction.management.service.recovery;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.io.IIOManager;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallbackProvider;
@@ -18,7 +17,7 @@
 
     public IFileMapProvider getFileMapManager();
 
-    public TransactionSubsystem getTransactionSubsystem();
+    public ITransactionSubsystem getTransactionSubsystem();
 
     public IIndexLifecycleManager getIndexLifecycleManager();
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IBuffer.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IBuffer.java
similarity index 95%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IBuffer.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IBuffer.java
index 8f39cbf..abb8ab8 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IBuffer.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IBuffer.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.nio.ByteBuffer;
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ICloseable.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ICloseable.java
similarity index 81%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ICloseable.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ICloseable.java
index f62fd66..4315a03 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ICloseable.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ICloseable.java
@@ -13,10 +13,9 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.resource;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 /**
  * Represents a closeable resource that implements a close(@see
@@ -35,6 +34,6 @@
      * @param context
      * @throws ACIDException
      */
-    public void close(TransactionContext context) throws ACIDException;
+    public void close(ITransactionContext context) throws ACIDException;
 
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IFileBasedBuffer.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IFileBasedBuffer.java
similarity index 95%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IFileBasedBuffer.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IFileBasedBuffer.java
index a4ea3cb..5093ca0 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IFileBasedBuffer.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IFileBasedBuffer.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.IOException;
 
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockHashTable.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockHashTable.java
new file mode 100644
index 0000000..8c0e373
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockHashTable.java
@@ -0,0 +1,21 @@
+package edu.uci.ics.asterix.common.transactions;
+
+/**
+ * @author pouria Interface for a hashTable, used in the internal data
+ *         structures of lockManager
+ * @param <K>
+ *            Type of the objects, used as keys
+ * @param <V>
+ *            Type of the objects, used as values
+ */
+public interface ILockHashTable<K, V> {
+
+    public void put(K key, V value);
+
+    public V get(K key);
+
+    public V remove(K key);
+
+    public int getKeysetSize();
+
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/ILockManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockManager.java
similarity index 78%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/ILockManager.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockManager.java
index 1341cc1..6e42e2d 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/ILockManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockManager.java
@@ -12,18 +12,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.locking;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 /**
  * Interface for the lockManager
  * 
- * @author pouria 
+ * @author pouria
  * @author kisskys
- * 
  */
 public interface ILockManager {
 
@@ -40,13 +37,15 @@
      * has a "weaker" lock, then the request would be interpreted as a convert
      * request
      * Waiting transaction would eventually garb the lock, or get timed-out
+     * 
      * @param datasetId
      * @param entityHashValue
      * @param lockMode
      * @param txnContext
      * @throws ACIDException
      */
-    public void lock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext) throws ACIDException;
+    public void lock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext)
+            throws ACIDException;
 
     /**
      * The method releases "All" the locks taken/waiting-on by a specific
@@ -57,41 +56,42 @@
      * @param txnContext
      * @throws ACIDException
      */
-    public void releaseLocks(TransactionContext txnContext) throws ACIDException;
+    public void releaseLocks(ITransactionContext txnContext) throws ACIDException;
 
     /**
-     * 
      * @param datasetId
      * @param entityHashValue
      * @param txnContext
-     * @throws ACIDException TODO
+     * @throws ACIDException
+     *             TODO
      */
-    public void unlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext) throws ACIDException;
+    public void unlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext) throws ACIDException;
 
     /**
-     * 
      * @param datasetId
      * @param entityHashValue
      * @param txnContext
-     * @throws ACIDException TODO
+     * @throws ACIDException
+     *             TODO
      */
-    public void unlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext, boolean commitFlag) throws ACIDException;
-    
+    public void unlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext, boolean commitFlag)
+            throws ACIDException;
+
     /**
      * Call to lock and unlock a specific resource in a specific lock mode
+     * 
      * @param datasetId
      * @param entityHashValue
-     * @param lockMode TODO
+     * @param lockMode
+     *            TODO
      * @param context
-     * 
      * @return
      * @throws ACIDException
      */
-    public void instantLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext context) throws ACIDException;
-
+    public void instantLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext context)
+            throws ACIDException;
 
     /**
-     * 
      * @param datasetId
      * @param entityHashValue
      * @param lockMode
@@ -99,10 +99,10 @@
      * @return
      * @throws ACIDException
      */
-    public boolean tryLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext context) throws ACIDException;
-    
+    public boolean tryLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext context)
+            throws ACIDException;
+
     /**
-     * 
      * @param datasetId
      * @param entityHashValue
      * @param lockMode
@@ -110,8 +110,9 @@
      * @return
      * @throws ACIDException
      */
-    boolean instantTryLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext)
+    boolean instantTryLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext)
             throws ACIDException;
+
     /**
      * Prints out the contents of the transactions' table in a readable fashion
      * 
@@ -120,6 +121,4 @@
      */
     public String prettyPrint() throws ACIDException;
 
-
-
 }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockMatrix.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockMatrix.java
new file mode 100644
index 0000000..e819b9a
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILockMatrix.java
@@ -0,0 +1,30 @@
+package edu.uci.ics.asterix.common.transactions;
+
+/**
+ * @author pouria
+ *         Shows: - The conflict matrix for the locking protocol (whether two
+ *         lock modes conflict with each other or not on a single resource) -
+ *         Whether request to convert a lock mode to a new one is a conversion
+ *         (i.e. the new lock mode is stringer than the current one) or not
+ *         Each lock mode is shown/interpreted as an integer
+ */
+
+public interface ILockMatrix {
+
+    /**
+     * @param mask
+     *            (current/expected) lock mask on the resource
+     * @param reqLockMode
+     *            index of the requested lockMode
+     * @return true if the lock request conflicts with the mask
+     */
+    public boolean conflicts(int mask, int reqLockMode);
+
+    /**
+     * @param currentLockMode
+     * @param reqLockMode
+     * @return true if the request is a conversion
+     */
+    public boolean isConversion(int currentLockMode, int reqLockMode);
+
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogCursor.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogCursor.java
similarity index 83%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogCursor.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogCursor.java
index 991de1b..ab2dcc2 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogCursor.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogCursor.java
@@ -12,11 +12,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.IOException;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 
 /**
  * Provides a cursor over the logs created to date.
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogFilter.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogFilter.java
similarity index 88%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogFilter.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogFilter.java
index 4c7eda2..9986add6 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogFilter.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogFilter.java
@@ -12,7 +12,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
+
+import edu.uci.ics.asterix.common.transactions.IBuffer;
 
 /**
  * Represents a predicate or a filter that needs to be applied when selectively
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
similarity index 80%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogManager.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
index 26229a7..9470d17 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
@@ -12,14 +12,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.IOException;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger.ReusableLogContentObject;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 public interface ILogManager {
 
@@ -36,7 +33,7 @@
      * @param logicalLogLocator
      * @throws ACIDException
      */
-    void log(byte logType, TransactionContext context, int datasetId, int PKHashValue, long resourceId,
+    void log(byte logType, ITransactionContext context, int datasetId, int PKHashValue, long resourceId,
             byte resourceMgrId, int logContentSize, ReusableLogContentObject reusableLogContentObject, ILogger logger,
             LogicalLogLocator logicalLogLocator) throws ACIDException;
 
@@ -53,7 +50,10 @@
             ACIDException;
 
     /**
-     * @param logicalLogLocator TODO
+     * @param logicalLogLocator
+     *            TODO
+     * @param logicalLogLocator
+     *            TODO
      * @param PhysicalLogLocator
      *            specifies the location of the log record to be read
      * @throws ACIDException
@@ -83,6 +83,6 @@
      * 
      * @return TransactionSubsystem
      */
-    public TransactionSubsystem getTransactionSubsystem();
+    public ITransactionSubsystem getTransactionSubsystem();
 
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogRecordHelper.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecordHelper.java
similarity index 85%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogRecordHelper.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecordHelper.java
index 0e24f9d..13fc722 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogRecordHelper.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogRecordHelper.java
@@ -13,9 +13,7 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.service.logging;
-
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+package edu.uci.ics.asterix.common.transactions;
 
 /**
  * Helper class for writing/reading of log header and checksum as well as
@@ -36,9 +34,9 @@
     public PhysicalLogLocator getPrevLSN(LogicalLogLocator logicalLogLocator);
 
     public boolean getPrevLSN(PhysicalLogLocator physicalLogLocator, LogicalLogLocator logicalLogLocator);
-    
+
     public long getResourceId(LogicalLogLocator logicalLogLocator);
-    
+
     public byte getResourceMgrId(LogicalLogLocator logicalLogLocater);
 
     public int getLogContentSize(LogicalLogLocator logicalLogLocater);
@@ -51,8 +49,9 @@
 
     public String getLogRecordForDisplay(LogicalLogLocator logicalLogLocator);
 
-    public void writeLogHeader(LogicalLogLocator logicalLogLocator, byte logType, TransactionContext context, int datasetId,
-            int PKHashValue, long prevLogicalLogLocator, long resourceId, byte resourceMgrId, int logRecordSize);
+    public void writeLogHeader(LogicalLogLocator logicalLogLocator, byte logType, ITransactionContext context,
+            int datasetId, int PKHashValue, long prevLogicalLogLocator, long resourceId, byte resourceMgrId,
+            int logRecordSize);
 
     public boolean validateLogRecord(LogicalLogLocator logicalLogLocator);
 
@@ -61,7 +60,7 @@
     public int getLogHeaderSize(byte logType);
 
     public int getLogChecksumSize();
-    
+
     public int getCommitLogSize();
 
-}
+}
\ No newline at end of file
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogger.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogger.java
new file mode 100644
index 0000000..78dd50b
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogger.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.common.transactions;
+
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+
+/**
+ * An interface providing call back APIs that are invoked {@link ILogManager} for providing the content for the log record and doing any pre/post
+ * processing.
+ */
+public interface ILogger {
+
+    public void preLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject)
+            throws ACIDException;
+
+    public void log(ITransactionContext context, final LogicalLogLocator logicalLogLocator, int logContentSize,
+            ReusableLogContentObject reusableLogContentObject) throws ACIDException;
+
+    public void postLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject)
+            throws ACIDException;
+
+}
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILoggerRepository.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILoggerRepository.java
new file mode 100644
index 0000000..036d66c
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILoggerRepository.java
@@ -0,0 +1,6 @@
+package edu.uci.ics.asterix.common.transactions;
+
+public interface ILoggerRepository {
+
+    public  ILogger getIndexLogger(long resourceId, byte resourceType);
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IRecoveryManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IRecoveryManager.java
similarity index 87%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IRecoveryManager.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IRecoveryManager.java
index 38802a2..dd9e734 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/IRecoveryManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IRecoveryManager.java
@@ -12,12 +12,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.recovery;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.IOException;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 
 /**
  * Provides API for failure recovery. Failure could be at application level and
@@ -67,7 +67,7 @@
      *            the transaction context associated with the transaction
      * @throws ACIDException
      */
-    public void rollbackTransaction(TransactionContext txnContext) throws ACIDException;
+    public void rollbackTransaction(ITransactionContext txnContext) throws ACIDException;
 
     public void checkpoint(boolean isSharpCheckpoint) throws ACIDException;
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/IResourceManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IResourceManager.java
similarity index 88%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/IResourceManager.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IResourceManager.java
index f7715e8..6874c7e 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/IResourceManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/IResourceManager.java
@@ -12,11 +12,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.transaction;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogRecordHelper;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 
 /**
  * Provides APIs for undo or redo of an operation on a resource.
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java
new file mode 100644
index 0000000..a06cc75
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java
@@ -0,0 +1,55 @@
+package edu.uci.ics.asterix.common.transactions;
+
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
+
+public interface ITransactionContext {
+
+    public void registerIndexAndCallback(ILSMIndex index, AbstractOperationCallback callback);
+
+    public void updateLastLSNForIndexes(long lastLSN);
+
+    public void decreaseActiveTransactionCountOnIndexes() throws HyracksDataException;
+
+    public LogicalLogLocator getFirstLogLocator();
+
+    public LogicalLogLocator getLastLogLocator();
+
+    public void addCloseableResource(ICloseable resource);
+
+    public JobId getJobId();
+
+    public void setStartWaitTime(long time);
+
+    public long getStartWaitTime();
+
+    public void setStatus(int status);
+
+    public int getStatus();
+
+    public void setTxnState(TransactionState txnState);
+
+    public TransactionState getTxnState();
+
+    public void releaseResources() throws ACIDException;
+
+    public void setLastLSN(long lsn);
+
+    public TransactionType getTransactionType();
+
+    public void setTransactionType(TransactionType transactionType);
+
+    public static final long INVALID_TIME = -1l; // used for showing a
+    // transaction is not waiting.
+    public static final int ACTIVE_STATUS = 0;
+    public static final int TIMED_OUT_STATUS = 1;
+
+    public enum TransactionType {
+        READ,
+        READ_WRITE
+    }
+
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
similarity index 70%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
index 3f55ac9..2bfc00d 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
@@ -12,9 +12,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.transaction;
+package edu.uci.ics.asterix.common.transactions;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 /**
  * Provides APIs for managing life cycle of a transaction, that is beginning a
@@ -43,10 +43,10 @@
      * @param jobId
      *            a unique value for the transaction id.
      * @return the transaction context associated with the initiated transaction
-     * @see TransactionContext
+     * @see ITransactionContext
      * @throws ACIDException
      */
-    public TransactionContext beginTransaction(JobId jobId) throws ACIDException;
+    public ITransactionContext beginTransaction(JobId jobId) throws ACIDException;
 
     /**
      * Returns the transaction context of an active transaction given the
@@ -57,33 +57,39 @@
      * @return
      * @throws ACIDException
      */
-    public TransactionContext getTransactionContext(JobId jobId) throws ACIDException;
+    public ITransactionContext getTransactionContext(JobId jobId) throws ACIDException;
 
     /**
      * Commits a transaction.
      * 
      * @param txnContext
      *            the transaction context associated with the transaction
-     * @param datasetId TODO
-     * @param PKHashVal TODO
+     * @param datasetId
+     *            TODO
+     * @param PKHashVal
+     *            TODO
      * @throws ACIDException
-     * @see transactionContextimport edu.uci.ics.hyracks.api.job.JobId;
+     * @see ITransactionContextimport edu.uci.ics.hyracks.api.job.JobId;
      * @see ACIDException
      */
-    public void commitTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal) throws ACIDException;
+    public void commitTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal)
+            throws ACIDException;
 
     /**
      * Aborts a transaction.
      * 
      * @param txnContext
      *            the transaction context associated with the transaction
-     * @param datasetId TODO
-     * @param PKHashVal TODO
+     * @param datasetId
+     *            TODO
+     * @param PKHashVal
+     *            TODO
      * @throws ACIDException
-     * @see transactionContext
+     * @see ITransactionContext
      * @see ACIDException
      */
-    public void abortTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal) throws ACIDException;
+    public void abortTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal)
+            throws ACIDException;
 
     /**
      * Indicates end of all activity for a transaction. In other words, all
@@ -92,23 +98,27 @@
      * 
      * @param txnContext
      *            the transaction context associated with the transaction
-     * @param datasetId TODO
-     * @param PKHashVal TODO
+     * @param datasetId
+     *            TODO
+     * @param PKHashVal
+     *            TODO
      * @param success
      *            indicates the success or failure. The transaction is committed
      *            or aborted accordingly.
      * @throws ACIDException
      */
-    public void completedTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal, boolean success) throws ACIDException;
+    public void completedTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal, boolean success)
+            throws ACIDException;
 
     /**
      * Returns the Transaction Provider for the transaction eco-system. A
      * transaction eco-system consists of a Log Manager, a Recovery Manager, a
      * Transaction Manager and a Lock Manager.
      * 
-     * @see TransactionSubsystem
+     * @see ITransactionSubsystem
      * @return TransactionProvider
      */
-    public TransactionSubsystem getTransactionProvider();
+    public ITransactionSubsystem getTransactionProvider();
+
 
 }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionSubsystem.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionSubsystem.java
new file mode 100644
index 0000000..e5462da
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionSubsystem.java
@@ -0,0 +1,21 @@
+package edu.uci.ics.asterix.common.transactions;
+
+
+public interface ITransactionSubsystem {
+
+    public ILogManager getLogManager();
+
+    public ILockManager getLockManager();
+
+    public ITransactionManager getTransactionManager();
+
+    public IRecoveryManager getRecoveryManager();
+
+    public TransactionalResourceManagerRepository getTransactionalResourceRepository();
+
+    public ILoggerRepository getTreeLoggerRepository();
+
+    public IAsterixAppRuntimeContextProvider getAsterixAppRuntimeContextProvider();
+
+    public String getId();
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobId.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/JobId.java
similarity index 90%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobId.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/JobId.java
index d306670..1246f22 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobId.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/JobId.java
@@ -1,4 +1,4 @@
-package edu.uci.ics.asterix.transaction.management.service.transaction;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.Serializable;
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
similarity index 98%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
index 581ce4c..4dc943c 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.io.Serializable;
 import java.util.Properties;
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogUtil.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogUtil.java
new file mode 100644
index 0000000..acf3346
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogUtil.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.common.transactions;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+
+/**
+ * A utility class providing helper methods for the {@link ILogManager}
+ */
+public class LogUtil {
+
+    private static final Logger LOGGER = Logger.getLogger(LogUtil.class.getName());
+
+    // read the log directory and initialize log anchor to point to the
+    // current log partition file and the offset where the log manager shall
+    // continue to insert log records.
+
+    public static PhysicalLogLocator initializeLogAnchor(ILogManager logManager) throws ACIDException {
+        int fileId = 0;
+        long offset = 0;
+        LogManagerProperties logManagerProperties = logManager.getLogManagerProperties();
+        File logDir = new File(logManagerProperties.getLogDir());
+        try {
+            if (logDir.exists()) {
+                List<String> logFiles = getLogFiles(logManagerProperties);
+                if (logFiles == null || logFiles.size() == 0) {
+                    FileUtil.createFileIfNotExists(getLogFilePath(logManagerProperties, 0));
+                    if (LOGGER.isLoggable(Level.INFO)) {
+                        LOGGER.info("created a log file: " + getLogFilePath(logManagerProperties, 0));
+                    }
+                } else {
+                    File logFile = new File(LogUtil.getLogFilePath(logManagerProperties,
+                            Long.parseLong(logFiles.get(logFiles.size() - 1))));
+                    fileId = logFiles.size() - 1;
+                    offset = logFile.length();
+                }
+            } else {
+                FileUtil.createNewDirectory(logManagerProperties.getLogDir());
+                if (LOGGER.isLoggable(Level.INFO)) {
+                    LOGGER.info("created the log directory: " + logManagerProperties.getLogDir());
+                }
+                FileUtil.createFileIfNotExists(getLogFilePath(logManagerProperties, 0));
+                if (LOGGER.isLoggable(Level.INFO)) {
+                    LOGGER.info("created a log file: " + getLogFilePath(logManagerProperties, 0));
+                }
+            }
+        } catch (IOException ioe) {
+            throw new ACIDException("Unable to initialize log anchor", ioe);
+        }
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info(" file id :" + fileId + " offset " + offset);
+        }
+        return new PhysicalLogLocator(fileId, offset, logManager);
+    }
+
+    public static List<String> getLogFiles(final LogManagerProperties logManagerProperties) {
+        File logDir = new File(logManagerProperties.getLogDir());
+        String[] logFiles = new String[0];
+        List<String> logFileCollection = new ArrayList<String>();
+        if (logDir.exists()) {
+            logFiles = logDir.list(new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    if (name.startsWith(logManagerProperties.getLogFilePrefix())) {
+                        return true;
+                    }
+                    return false;
+                }
+            });
+        }
+        for (String logFile : logFiles) {
+            logFileCollection.add(logFile.substring(logManagerProperties.getLogFilePrefix().length() + 1));
+        }
+        Collections.sort(logFileCollection, new Comparator<String>() {
+            @Override
+            public int compare(String arg0, String arg1) {
+                return Integer.parseInt(arg0) - Integer.parseInt(arg1);
+            }
+        });
+        return logFileCollection;
+    }
+
+    public static long getFileId(String logFilePath, LogManagerProperties logManagerProperties) {
+        String logFileName = logFilePath;
+        if (logFilePath.contains(File.separator)) {
+            logFileName = logFilePath.substring(logFilePath.lastIndexOf(File.separator));
+        }
+        return Long.parseLong(logFileName.substring(logFileName.indexOf(logManagerProperties.getLogFilePrefix())));
+    }
+
+    public static String getLogFilePath(LogManagerProperties logManagerProperties, long fileId) {
+        return logManagerProperties.getLogDir() + File.separator + logManagerProperties.getLogFilePrefix() + "_"
+                + fileId;
+    }
+
+    public static LogicalLogLocator getDummyLogicalLogLocator(ILogManager logManager) {
+        LogicalLogLocator logicalLogLocator = new LogicalLogLocator(-1, null, -1, logManager);
+        return logicalLogLocator;
+    }
+
+    /*
+     * given a lsn, get the offset within the log file where the corresponding
+     * log record is (to be) placed.
+     */
+    public static long getFileOffset(ILogManager logManager, long lsn) {
+        return lsn % logManager.getLogManagerProperties().getLogPartitionSize();
+    }
+
+    /*
+     * given a lsn, get the file id that contains the log record.
+     */
+    public static long getFileId(ILogManager logManager, long lsn) {
+        return lsn / logManager.getLogManagerProperties().getLogPartitionSize();
+    }
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogicalLogLocator.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogicalLogLocator.java
similarity index 96%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogicalLogLocator.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogicalLogLocator.java
index f9eec7d..81dc6e2 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogicalLogLocator.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogicalLogLocator.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/MutableResourceId.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/MutableResourceId.java
new file mode 100644
index 0000000..a6cebd6
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/MutableResourceId.java
@@ -0,0 +1,30 @@
+package edu.uci.ics.asterix.common.transactions;
+
+public class MutableResourceId{
+    long id;
+
+    public MutableResourceId(long id) {
+        this.id = id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    @Override
+    public int hashCode() {
+        return (int)id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if ((o == null) || !(o instanceof MutableResourceId)) {
+            return false;
+        }
+        return ((MutableResourceId) o).id == this.id;
+    }
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/PhysicalLogLocator.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/PhysicalLogLocator.java
similarity index 96%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/PhysicalLogLocator.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/PhysicalLogLocator.java
index d8de007..7c0cff7 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/PhysicalLogLocator.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/PhysicalLogLocator.java
@@ -12,7 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.asterix.transaction.management.service.logging;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.util.concurrent.atomic.AtomicLong;
 
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ReusableLogContentObject.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ReusableLogContentObject.java
new file mode 100644
index 0000000..a327c10
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ReusableLogContentObject.java
@@ -0,0 +1,67 @@
+package edu.uci.ics.asterix.common.transactions;
+
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
+import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
+
+/**
+ * Represents the state of a transaction thread. The state contains information
+ * that includes the tuple being operated, the operation and the location of the
+ * log record corresponding to the operation.
+ */
+public class ReusableLogContentObject {
+
+    private LogicalLogLocator logicalLogLocator;
+    private IndexOperation newOperation;
+    private ITupleReference newValue;
+    private IndexOperation oldOperation;
+    private ITupleReference oldValue;
+
+    public ReusableLogContentObject(LogicalLogLocator logicalLogLocator, IndexOperation newOperation,
+            ITupleReference newValue, IndexOperation oldOperation, ITupleReference oldValue) {
+        this.logicalLogLocator = logicalLogLocator;
+        this.newOperation = newOperation;
+        this.newValue = newValue;
+        this.oldOperation = oldOperation;
+        this.oldValue = oldValue;
+    }
+
+    public synchronized LogicalLogLocator getLogicalLogLocator() {
+        return logicalLogLocator;
+    }
+
+    public synchronized void setLogicalLogLocator(LogicalLogLocator logicalLogLocator) {
+        this.logicalLogLocator = logicalLogLocator;
+    }
+
+    public synchronized void setNewOperation(IndexOperation newOperation) {
+        this.newOperation = newOperation;
+    }
+
+    public synchronized IndexOperation getNewOperation() {
+        return newOperation;
+    }
+
+    public synchronized void setNewValue(ITupleReference newValue) {
+        this.newValue = newValue;
+    }
+
+    public synchronized ITupleReference getNewValue() {
+        return newValue;
+    }
+
+    public synchronized void setOldOperation(IndexOperation oldOperation) {
+        this.oldOperation = oldOperation;
+    }
+
+    public synchronized IndexOperation getOldOperation() {
+        return oldOperation;
+    }
+
+    public synchronized void setOldValue(ITupleReference oldValue) {
+        this.oldValue = oldValue;
+    }
+
+    public synchronized ITupleReference getOldValue() {
+        return oldValue;
+    }
+}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/TransactionalResourceManagerRepository.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/TransactionalResourceManagerRepository.java
similarity index 92%
rename from asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/TransactionalResourceManagerRepository.java
rename to asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/TransactionalResourceManagerRepository.java
index d38226b..35f69d4 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/TransactionalResourceManagerRepository.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/TransactionalResourceManagerRepository.java
@@ -13,13 +13,11 @@
  * limitations under the License.
  */
 
-package edu.uci.ics.asterix.transaction.management.resource;
+package edu.uci.ics.asterix.common.transactions;
 
 import java.util.HashMap;
 import java.util.Map;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
-
 /**
  * Represents a repository containing Resource Managers and Resources in the
  * transaction eco-system. Operations on a resource require acquiring
diff --git a/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java b/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
index 8449971..79ab067 100644
--- a/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
+++ b/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
@@ -342,8 +342,7 @@
 
         List<CompilationUnit> cUnits = testCaseCtx.getTestCase().getCompilationUnit();
         for (CompilationUnit cUnit : cUnits) {
-            LOGGER.info("[TEST]: " + testCaseCtx.getTestCase().getFilePath() + "/" + cUnit.getName());
-
+            
             testFileCtxs = testCaseCtx.getTestFiles(cUnit);
             expectedResultFileCtxs = testCaseCtx.getExpectedResultFiles(cUnit);
 
@@ -378,6 +377,7 @@
 
                                 TestsUtils.runScriptAndCompareWithResult(testFile, new PrintWriter(System.err),
                                         expectedResultFile, actualFile);
+                                LOGGER.info("[TEST]: " + testCaseCtx.getTestCase().getFilePath() + "/" + cUnit.getName() +  " PASSED ");
                             }
                             queryCount++;
                             break;
@@ -387,6 +387,7 @@
                         default:
                             throw new IllegalArgumentException("No statements of type " + ctx.getType());
                     }
+                    
                 } catch (Exception e) {
                     if (cUnit.getExpectedError().isEmpty()) {
                         throw new Exception("Test \"" + testFile + "\" FAILED!", e);
diff --git a/asterix-metadata/pom.xml b/asterix-metadata/pom.xml
index 425e8ff..6f70568 100644
--- a/asterix-metadata/pom.xml
+++ b/asterix-metadata/pom.xml
@@ -42,6 +42,12 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
+			<groupId>edu.uci.ics.asterix</groupId>
+			<artifactId>asterix-runtime</artifactId>
+			<version>0.0.6-SNAPSHOT</version>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
 			<groupId>org.apache.hadoop</groupId>
 			<artifactId>hadoop-core</artifactId>
 			<version>0.20.2</version>
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataCache.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataCache.java
index 0382315..1496208 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataCache.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataCache.java
@@ -22,8 +22,8 @@
 
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.metadata.api.IMetadataEntity;
-import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
+import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Datatype;
 import edu.uci.ics.asterix.metadata.entities.Dataverse;
 import edu.uci.ics.asterix.metadata.entities.Function;
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
index 09ec2f7..f9f5260 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
@@ -21,7 +21,9 @@
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.api.IAsterixStateProxy;
 import edu.uci.ics.asterix.metadata.api.IMetadataManager;
 import edu.uci.ics.asterix.metadata.api.IMetadataNode;
@@ -33,8 +35,6 @@
 import edu.uci.ics.asterix.metadata.entities.Index;
 import edu.uci.ics.asterix.metadata.entities.Node;
 import edu.uci.ics.asterix.metadata.entities.NodeGroup;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.asterix.transaction.management.service.transaction.JobIdFactory;
 
 /**
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
index 5bdf086..5aca7c4 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
@@ -19,11 +19,18 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
-import edu.uci.ics.asterix.common.context.AsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.metadata.api.IMetadataIndex;
 import edu.uci.ics.asterix.metadata.api.IMetadataNode;
@@ -55,16 +62,9 @@
 import edu.uci.ics.asterix.om.base.AMutableString;
 import edu.uci.ics.asterix.om.base.AString;
 import edu.uci.ics.asterix.om.types.BuiltinType;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.PrimaryIndexModificationOperationCallback;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.SecondaryIndexModificationOperationCallback;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
 import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetIdFactory;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext.TransactionType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
@@ -93,7 +93,7 @@
     private static final DatasetId METADATA_DATASET_ID = new DatasetId(MetadataPrimaryIndexes.METADATA_DATASET_ID);
 
     private IIndexLifecycleManager indexLifecycleManager;
-    private TransactionSubsystem transactionSubsystem;
+    private ITransactionSubsystem transactionSubsystem;
 
     public static final MetadataNode INSTANCE = new MetadataNode();
 
@@ -101,7 +101,7 @@
         super();
     }
 
-    public void initialize(AsterixAppRuntimeContext runtimeContext) {
+    public void initialize(IAsterixAppRuntimeContext runtimeContext) {
         this.transactionSubsystem = runtimeContext.getTransactionSubsystem();
         this.indexLifecycleManager = runtimeContext.getIndexLifecycleManager();
     }
@@ -113,14 +113,14 @@
 
     @Override
     public void commitTransaction(JobId jobId) throws RemoteException, ACIDException {
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
         transactionSubsystem.getTransactionManager().commitTransaction(txnCtx, new DatasetId(-1), -1);
     }
 
     @Override
     public void abortTransaction(JobId jobId) throws RemoteException, ACIDException {
         try {
-            TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+            ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
             transactionSubsystem.getTransactionManager().abortTransaction(txnCtx, new DatasetId(-1), -1);
         } catch (ACIDException e) {
             e.printStackTrace();
@@ -130,13 +130,13 @@
 
     @Override
     public void lock(JobId jobId, byte lockMode) throws ACIDException, RemoteException {
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
         transactionSubsystem.getLockManager().lock(METADATA_DATASET_ID, -1, lockMode, txnCtx);
     }
 
     @Override
     public void unlock(JobId jobId) throws ACIDException, RemoteException {
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
         transactionSubsystem.getLockManager().unlock(METADATA_DATASET_ID, -1, txnCtx);
     }
 
@@ -271,7 +271,7 @@
 
         IIndexAccessor indexAccessor = lsmIndex.createAccessor(modCallback, NoOpOperationCallback.INSTANCE);
 
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
         txnCtx.setTransactionType(TransactionType.READ_WRITE);
 
         // TODO: fix exceptions once new BTree exception model is in hyracks.
@@ -282,7 +282,7 @@
 
     private IModificationOperationCallback createIndexModificationCallback(JobId jobId, long resourceId,
             IMetadataIndex metadataIndex, ILSMIndex lsmIndex, IndexOperation indexOp) throws Exception {
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
 
         if (metadataIndex.isPrimaryIndex()) {
             return new PrimaryIndexModificationOperationCallback(metadataIndex.getDatasetId().getId(),
@@ -573,7 +573,7 @@
                 lsmIndex, IndexOperation.DELETE);
         IIndexAccessor indexAccessor = lsmIndex.createAccessor(modCallback, NoOpOperationCallback.INSTANCE);
 
-        TransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
+        ITransactionContext txnCtx = transactionSubsystem.getTransactionManager().getTransactionContext(jobId);
         txnCtx.setTransactionType(TransactionType.READ_WRITE);
 
         indexAccessor.delete(tuple);
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataTransactionContext.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataTransactionContext.java
index cbd37d6..c76fb16 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataTransactionContext.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataTransactionContext.java
@@ -18,6 +18,7 @@
 import java.util.ArrayList;
 
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.external.dataset.adapter.AdapterIdentifier;
 import edu.uci.ics.asterix.metadata.api.IMetadataEntity;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
@@ -27,7 +28,6 @@
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.metadata.entities.Index;
 import edu.uci.ics.asterix.metadata.entities.NodeGroup;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 
 /**
  * Used to implement serializable transactions against the MetadataCache.
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataIndex.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataIndex.java
index ca6ab08..efd8ecb 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataIndex.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataIndex.java
@@ -17,16 +17,13 @@
 
 import java.util.List;
 
+import edu.uci.ics.asterix.common.transactions.DatasetId;
 import edu.uci.ics.asterix.om.types.ARecordType;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 
 /**
  * Descriptor interface for a primary or secondary index on metadata datasets.
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataManager.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataManager.java
index f11144e..527ee91 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataManager.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataManager.java
@@ -18,19 +18,18 @@
 import java.rmi.RemoteException;
 import java.util.List;
 
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataTransactionContext;
-import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
+import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Datatype;
 import edu.uci.ics.asterix.metadata.entities.Dataverse;
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.metadata.entities.Index;
 import edu.uci.ics.asterix.metadata.entities.Node;
 import edu.uci.ics.asterix.metadata.entities.NodeGroup;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 
 /**
  * A metadata manager provides user access to Asterix metadata (e.g., types,
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataNode.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataNode.java
index e0b5e96..9ec233b 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataNode.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IMetadataNode.java
@@ -20,18 +20,18 @@
 import java.rmi.RemoteException;
 import java.util.List;
 
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.MetadataException;
-import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
+import edu.uci.ics.asterix.metadata.entities.DatasourceAdapter;
 import edu.uci.ics.asterix.metadata.entities.Datatype;
 import edu.uci.ics.asterix.metadata.entities.Dataverse;
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.metadata.entities.Index;
 import edu.uci.ics.asterix.metadata.entities.Node;
 import edu.uci.ics.asterix.metadata.entities.NodeGroup;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 
 /**
  * A metadata node stores metadata in its local storage structures (currently
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IValueExtractor.java
index d8958dd..6994bdc 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/api/IValueExtractor.java
@@ -17,8 +17,8 @@
 
 import java.io.IOException;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.MetadataException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataBootstrap.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataBootstrap.java
index f3ccc9c..791666d 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataBootstrap.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataBootstrap.java
@@ -26,13 +26,15 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
 import edu.uci.ics.asterix.common.config.AsterixStorageProperties;
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
-import edu.uci.ics.asterix.common.context.AsterixAppRuntimeContext;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.TransactionalResourceManagerRepository;
 import edu.uci.ics.asterix.external.adapter.factory.IAdapterFactory;
 import edu.uci.ics.asterix.external.dataset.adapter.AdapterIdentifier;
 import edu.uci.ics.asterix.metadata.IDatasetDetails;
@@ -55,13 +57,11 @@
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.asterix.om.types.IAType;
 import edu.uci.ics.asterix.runtime.formats.NonTaggedDataFormat;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.LSMBTreeLocalResourceMetadata;
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceFactoryProvider;
-import edu.uci.ics.asterix.transaction.management.resource.TransactionalResourceManagerRepository;
 import edu.uci.ics.asterix.transaction.management.service.logging.IndexResourceManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
@@ -101,7 +101,7 @@
     private static final int DEFAULT_MEM_PAGE_SIZE = 32768;
     private static final int DEFAULT_MEM_NUM_PAGES = 100;
 
-    private static AsterixAppRuntimeContext runtimeContext;
+    private static IAsterixAppRuntimeContext runtimeContext;
 
     private static IBufferCache bufferCache;
     private static IFileMapProvider fileMapProvider;
@@ -132,7 +132,7 @@
 
     public static void startUniverse(IAsterixPropertiesProvider asterixPropertiesProvider,
             INCApplicationContext ncApplicationContext, boolean isNewUniverse) throws Exception {
-        runtimeContext = (AsterixAppRuntimeContext) ncApplicationContext.getApplicationObject();
+        runtimeContext = (IAsterixAppRuntimeContext) ncApplicationContext.getApplicationObject();
         propertiesProvider = asterixPropertiesProvider;
 
         // Initialize static metadata objects, such as record types and metadata
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataIndex.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataIndex.java
index c0ce030..8036cfb 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataIndex.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/bootstrap/MetadataIndex.java
@@ -20,6 +20,7 @@
 import java.util.List;
 
 import edu.uci.ics.asterix.common.exceptions.AsterixRuntimeException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
 import edu.uci.ics.asterix.formats.nontagged.AqlBinaryComparatorFactoryProvider;
 import edu.uci.ics.asterix.formats.nontagged.AqlBinaryHashFunctionFactoryProvider;
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
@@ -27,17 +28,12 @@
 import edu.uci.ics.asterix.metadata.api.IMetadataIndex;
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.api.io.FileReference;
-import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 
 /**
  * Descriptor for a primary or secondary index on metadata datasets.
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
index 2e45802..14020aa 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
@@ -28,10 +28,12 @@
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
-import edu.uci.ics.asterix.common.context.AsterixRuntimeComponentsProvider;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
 import edu.uci.ics.asterix.common.context.TransactionSubsystemProvider;
-import edu.uci.ics.asterix.common.dataflow.IAsterixApplicationContextInfo;
+import edu.uci.ics.asterix.common.dataflow.IStorageContext;
 import edu.uci.ics.asterix.common.parse.IParseFileSplitsDecl;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.dataflow.data.nontagged.valueproviders.AqlPrimitiveValueProviderFactory;
 import edu.uci.ics.asterix.external.adapter.factory.IAdapterFactory;
 import edu.uci.ics.asterix.external.adapter.factory.IGenericDatasetAdapterFactory;
@@ -74,8 +76,7 @@
 import edu.uci.ics.asterix.transaction.management.opcallbacks.PrimaryIndexSearchOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.SecondaryIndexModificationOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.SecondaryIndexSearchOperationCallbackFactory;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.transaction.management.service.transaction.AsterixRuntimeComponentsProvider;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -509,7 +510,7 @@
             IBinaryComparatorFactory[] comparatorFactories = JobGenHelper.variablesToAscBinaryComparatorFactories(
                     outputVars, keysStartIndex, numKeys, typeEnv, context);
 
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> spPc;
             try {
                 spPc = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(dataset.getDataverseName(),
@@ -530,7 +531,7 @@
                 }
 
                 AqlMetadataImplConfig aqlMetadataImplConfig = (AqlMetadataImplConfig) implConfig;
-                TransactionSubsystemProvider txnSubsystemProvider = new TransactionSubsystemProvider();
+                ITransactionSubsystemProvider txnSubsystemProvider = new TransactionSubsystemProvider();
                 if (aqlMetadataImplConfig != null && aqlMetadataImplConfig.isInstantLock()) {
                     searchCallbackFactory = new PrimaryIndexInstantSearchOperationCallbackFactory(jobId, datasetId,
                             primaryKeyFields, txnSubsystemProvider, ResourceType.LSM_BTREE);
@@ -550,6 +551,7 @@
                             storageProperties.getMemoryComponentPageSize(),
                             storageProperties.getMemoryComponentNumPages(),
                             storageProperties.getBloomFilterFalsePositiveRate()), retainInput, searchCallbackFactory);
+
             return new Pair<IOperatorDescriptor, AlgebricksPartitionConstraint>(btreeSearchOp, spPc.second);
 
         } catch (MetadataException me) {
@@ -600,7 +602,7 @@
                     outputVars, keysStartIndex, numNestedSecondaryKeyFields, typeEnv, context);
             ITypeTraits[] typeTraits = JobGenHelper.variablesToTypeTraits(outputVars, keysStartIndex,
                     numNestedSecondaryKeyFields, typeEnv, context);
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> spPc = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
                     dataset.getDataverseName(), dataset.getDatasetName(), indexName);
 
@@ -757,7 +759,7 @@
 
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
                     dataSource.getId().getDataverseName(), datasetName, indexName);
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
 
             String numElementsHintString = dataset.getHints().get("CARDINALITY");
             long numElementsHint;
@@ -822,7 +824,7 @@
 
             ITypeTraits[] typeTraits = DatasetUtils.computeTupleTypeTraits(dataset, itemType);
 
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             IBinaryComparatorFactory[] comparatorFactories = DatasetUtils.computeKeysBinaryComparatorFactories(dataset,
                     itemType, context.getBinaryComparatorFactoryProvider());
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
@@ -1017,7 +1019,7 @@
                 ++i;
             }
 
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
                     dataverseName, datasetName, indexName);
 
@@ -1143,7 +1145,7 @@
             IBinaryTokenizerFactory tokenizerFactory = NonTaggedFormatUtil.getBinaryTokenizerFactory(
                     secondaryKeyType.getTypeTag(), indexType, secondaryIndex.getGramLength());
 
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
                     dataverseName, datasetName, indexName);
 
@@ -1238,7 +1240,7 @@
 
             IBinaryComparatorFactory[] primaryComparatorFactories = DatasetUtils.computeKeysBinaryComparatorFactories(
                     dataset, recType, context.getBinaryComparatorFactoryProvider());
-            IAsterixApplicationContextInfo appContext = (IAsterixApplicationContextInfo) context.getAppContext();
+            IStorageContext appContext = (IStorageContext) context.getAppContext();
             Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = splitProviderAndPartitionConstraintsForInternalOrFeedDataset(
                     dataverseName, datasetName, indexName);
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entitytupletranslators/DatatypeTupleTranslator.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entitytupletranslators/DatatypeTupleTranslator.java
index 7cfa6d0..6c55f12 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entitytupletranslators/DatatypeTupleTranslator.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entitytupletranslators/DatatypeTupleTranslator.java
@@ -29,6 +29,7 @@
 import edu.uci.ics.asterix.builders.OrderedListBuilder;
 import edu.uci.ics.asterix.builders.RecordBuilder;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataNode;
@@ -49,7 +50,6 @@
 import edu.uci.ics.asterix.om.types.AbstractCollectionType;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatasetNameValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatasetNameValueExtractor.java
index e554643..68ff549 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatasetNameValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatasetNameValueExtractor.java
@@ -19,11 +19,11 @@
 import java.io.DataInput;
 import java.io.DataInputStream;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AObjectSerializerDeserializer;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.api.IValueExtractor;
 import edu.uci.ics.asterix.om.base.AString;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatatypeNameValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatatypeNameValueExtractor.java
index 2e4dbe4..62e7a28 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatatypeNameValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/DatatypeNameValueExtractor.java
@@ -20,12 +20,12 @@
 import java.io.DataInputStream;
 import java.rmi.RemoteException;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AObjectSerializerDeserializer;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataNode;
 import edu.uci.ics.asterix.metadata.api.IValueExtractor;
 import edu.uci.ics.asterix.om.base.AString;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/MetadataEntityValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/MetadataEntityValueExtractor.java
index 7ae334e..9593783 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/MetadataEntityValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/MetadataEntityValueExtractor.java
@@ -17,10 +17,10 @@
 
 import java.io.IOException;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.api.IMetadataEntityTupleTranslator;
 import edu.uci.ics.asterix.metadata.api.IValueExtractor;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/NestedDatatypeNameValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/NestedDatatypeNameValueExtractor.java
index d4109cd..81da41b 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/NestedDatatypeNameValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/NestedDatatypeNameValueExtractor.java
@@ -19,11 +19,11 @@
 import java.io.DataInput;
 import java.io.DataInputStream;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AObjectSerializerDeserializer;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.api.IValueExtractor;
 import edu.uci.ics.asterix.om.base.AString;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/TupleCopyValueExtractor.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/TupleCopyValueExtractor.java
index 03bc963..fbf8cc8 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/TupleCopyValueExtractor.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/valueextractors/TupleCopyValueExtractor.java
@@ -18,9 +18,9 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.api.IValueExtractor;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/AsterixRuntimeUtil.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/AsterixRuntimeUtil.java
index e280b2e..6d3edbc 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/AsterixRuntimeUtil.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/AsterixRuntimeUtil.java
@@ -23,7 +23,7 @@
 import java.util.Map;
 import java.util.Set;
 
-import edu.uci.ics.asterix.common.api.AsterixAppContextInfo;
+import edu.uci.ics.asterix.common.api.AsterixContextInfo;
 
 /**
  * Utility class for obtaining information on the set of Hyracks NodeController
@@ -31,38 +31,32 @@
  */
 public class AsterixRuntimeUtil {
 
-	public static Set<String> getNodeControllersOnIP(String ipAddress)
-			throws Exception {
-		Map<String, Set<String>> nodeControllerInfo = getNodeControllerMap();
-		Set<String> nodeControllersAtLocation = nodeControllerInfo
-				.get(ipAddress);
-		return nodeControllersAtLocation;
-	}
+    public static Set<String> getNodeControllersOnIP(String ipAddress) throws Exception {
+        Map<String, Set<String>> nodeControllerInfo = getNodeControllerMap();
+        Set<String> nodeControllersAtLocation = nodeControllerInfo.get(ipAddress);
+        return nodeControllersAtLocation;
+    }
 
-	public static List<String> getAllNodeControllers() throws Exception {
-		Collection<Set<String>> nodeControllersCollection = getNodeControllerMap()
-				.values();
-		List<String> nodeControllers = new ArrayList<String>();
-		for (Set<String> ncCollection : nodeControllersCollection) {
-			nodeControllers.addAll(ncCollection);
-		}
-		return nodeControllers;
-	}
+    public static List<String> getAllNodeControllers() throws Exception {
+        Collection<Set<String>> nodeControllersCollection = getNodeControllerMap().values();
+        List<String> nodeControllers = new ArrayList<String>();
+        for (Set<String> ncCollection : nodeControllersCollection) {
+            nodeControllers.addAll(ncCollection);
+        }
+        return nodeControllers;
+    }
 
-	public static Map<String, Set<String>> getNodeControllerMap()
-			throws Exception {
-		Map<String, Set<String>> map = new HashMap<String, Set<String>>();
-		AsterixAppContextInfo.getInstance().getCCApplicationContext()
-				.getCCContext().getIPAddressNodeMap(map);
-		return map;
-	}
+    public static Map<String, Set<String>> getNodeControllerMap() throws Exception {
+        Map<String, Set<String>> map = new HashMap<String, Set<String>>();
+        AsterixContextInfo.INSTANCE.getCCApplicationContext().getCCContext().getIPAddressNodeMap(map);
+        return map;
+    }
 
-	public static String getIPAddress(String hostname)
-			throws UnknownHostException {
-		String address = InetAddress.getByName(hostname).getHostAddress();
-		if (address.equals("127.0.1.1")) {
-			address = "127.0.0.1";
-		}
-		return address;
-	}
+    public static String getIPAddress(String hostname) throws UnknownHostException {
+        String address = InetAddress.getByName(hostname).getHostAddress();
+        if (address.equals("127.0.1.1")) {
+            address = "127.0.0.1";
+        }
+        return address;
+    }
 }
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/job/listener/JobEventListenerFactory.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/job/listener/JobEventListenerFactory.java
index 45e19c6..f0e8ec5 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/job/listener/JobEventListenerFactory.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/job/listener/JobEventListenerFactory.java
@@ -1,12 +1,12 @@
 package edu.uci.ics.asterix.runtime.job.listener;
 
-import edu.uci.ics.asterix.common.context.AsterixAppRuntimeContext;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext.TransactionType;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.api.context.IHyracksJobletContext;
 import edu.uci.ics.hyracks.api.job.IJobletEventListener;
 import edu.uci.ics.hyracks.api.job.IJobletEventListenerFactory;
@@ -22,7 +22,7 @@
         this.jobId = jobId;
         this.transactionalWrite = transactionalWrite;
     }
-    
+
     public JobId getJobId() {
         return jobId;
     }
@@ -34,12 +34,13 @@
             @Override
             public void jobletFinish(JobStatus jobStatus) {
                 try {
-                    ITransactionManager txnManager = ((AsterixAppRuntimeContext) jobletContext.getApplicationContext()
+                    ITransactionManager txnManager = ((IAsterixAppRuntimeContext) jobletContext.getApplicationContext()
                             .getApplicationObject()).getTransactionSubsystem().getTransactionManager();
-                    TransactionContext txnContext = txnManager.getTransactionContext(jobId);
+                    ITransactionContext txnContext = txnManager.getTransactionContext(jobId);
                     txnContext.setTransactionType(transactionalWrite ? TransactionType.READ_WRITE
                             : TransactionType.READ);
-                    txnManager.completedTransaction(txnContext, new DatasetId(-1), -1, !(jobStatus == JobStatus.FAILURE));
+                    txnManager.completedTransaction(txnContext, new DatasetId(-1), -1,
+                            !(jobStatus == JobStatus.FAILURE));
                 } catch (ACIDException e) {
                     throw new Error(e);
                 }
@@ -48,7 +49,7 @@
             @Override
             public void jobletStart() {
                 try {
-                    ((AsterixAppRuntimeContext) jobletContext.getApplicationContext().getApplicationObject())
+                    ((IAsterixAppRuntimeContext) jobletContext.getApplicationContext().getApplicationObject())
                             .getTransactionSubsystem().getTransactionManager().getTransactionContext(jobId);
                 } catch (ACIDException e) {
                     throw new Error(e);
diff --git a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/datagen/AdmDataGen.java b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/datagen/AdmDataGen.java
index 3d28851..6b177a7 100644
--- a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/datagen/AdmDataGen.java
+++ b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/datagen/AdmDataGen.java
@@ -36,6 +36,7 @@
 import edu.uci.ics.asterix.common.annotations.TypeDataGen;
 import edu.uci.ics.asterix.common.annotations.UndeclaredFieldsDataGen;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataTransactionContext;
 import edu.uci.ics.asterix.om.types.ARecordType;
@@ -46,8 +47,7 @@
 import edu.uci.ics.asterix.om.types.IAType;
 import edu.uci.ics.asterix.om.types.TypeSignature;
 import edu.uci.ics.asterix.tools.translator.ADGenDmlTranslator;
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
 import edu.uci.ics.hyracks.algebricks.data.utils.WriteValueTools;
@@ -1000,4 +1000,4 @@
         }
     }
 
-}
+}
\ No newline at end of file
diff --git a/asterix-transactions/pom.xml b/asterix-transactions/pom.xml
index 7d951ce..d09ce8a 100644
--- a/asterix-transactions/pom.xml
+++ b/asterix-transactions/pom.xml
@@ -40,6 +40,13 @@
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-lsm-invertedindex</artifactId>
 		</dependency>
+                <dependency>
+                        <groupId>edu.uci.ics.asterix</groupId>
+                        <artifactId>asterix-common</artifactId>
+                        <version>0.0.6-SNAPSHOT</version>
+                        <type>jar</type>
+                        <scope>compile</scope>
+                </dependency>
 	</dependencies>
 
 </project>
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/IndexOperationTracker.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/IndexOperationTracker.java
index 2016d08..9da0a8f 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/IndexOperationTracker.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/IndexOperationTracker.java
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallback.java
index a78f2ff..dedc5df 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallback.java
@@ -15,9 +15,10 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
@@ -30,7 +31,7 @@
         ISearchOperationCallback {
 
     public PrimaryIndexInstantSearchOperationCallback(int datasetId, int[] entityIdFields, ILockManager lockManager,
-            TransactionContext txnCtx) {
+            ITransactionContext txnCtx) {
         super(datasetId, entityIdFields, txnCtx, lockManager);
     }
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallbackFactory.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallbackFactory.java
index 3773950..3efd90b 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallbackFactory.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexInstantSearchOperationCallbackFactory.java
@@ -15,11 +15,12 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallbackFactory;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
@@ -38,9 +39,9 @@
     @Override
     public ISearchOperationCallback createSearchOperationCallback(long resourceId, IHyracksTaskContext ctx)
             throws HyracksDataException {
-        TransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
+        ITransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
         try {
-            TransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
+            ITransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
             return new PrimaryIndexInstantSearchOperationCallback(datasetId, primaryKeyFields,
                     txnSubsystem.getLockManager(), txnCtx);
         } catch (ACIDException e) {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
index 824a324..15ccde4 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallback.java
@@ -15,12 +15,14 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
@@ -37,11 +39,11 @@
     protected final long resourceId;
     protected final byte resourceType;
     protected final IndexOperation indexOp;
-    protected final TransactionSubsystem txnSubsystem;
+    protected final ITransactionSubsystem txnSubsystem;
 
     public PrimaryIndexModificationOperationCallback(int datasetId, int[] primaryKeyFields,
-            TransactionContext txnCtx, ILockManager lockManager,
-            TransactionSubsystem txnSubsystem, long resourceId, byte resourceType, IndexOperation indexOp) {
+            ITransactionContext txnCtx, ILockManager lockManager,
+            ITransactionSubsystem txnSubsystem, long resourceId, byte resourceType, IndexOperation indexOp) {
         super(datasetId, primaryKeyFields, txnCtx, lockManager);
         this.resourceId = resourceId;
         this.resourceType = resourceType;
@@ -61,7 +63,7 @@
 
     @Override
     public void found(ITupleReference before, ITupleReference after) throws HyracksDataException {
-        IndexLogger logger = txnSubsystem.getTreeLoggerRepository().getIndexLogger(resourceId, resourceType);
+        ILogger logger = txnSubsystem.getTreeLoggerRepository().getIndexLogger(resourceId, resourceType);
         int pkHash = computePrimaryKeyHashValue(after, primaryKeyFields);
         LSMBTreeTupleReference lsmBTreeTuple = (LSMBTreeTupleReference) before;
         IndexOperation oldOp = IndexOperation.INSERT;
@@ -72,7 +74,7 @@
             oldOp = IndexOperation.DELETE;
         }
         try {
-            logger.generateLogRecord(txnSubsystem, txnCtx, datasetId.getId(), pkHash, resourceId, indexOp, after,
+            ((IndexLogger)logger).generateLogRecord(txnSubsystem, txnCtx, datasetId.getId(), pkHash, resourceId, indexOp, after,
                     oldOp, before);
         } catch (ACIDException e) {
             throw new HyracksDataException(e);
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallbackFactory.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallbackFactory.java
index c75ab6f..038ecee 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallbackFactory.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexModificationOperationCallbackFactory.java
@@ -15,11 +15,13 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallbackFactory;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
@@ -47,7 +49,7 @@
     public IModificationOperationCallback createModificationOperationCallback(long resourceId, Object resource,
             IHyracksTaskContext ctx) throws HyracksDataException {
 
-        TransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
+        ITransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
         IIndexLifecycleManager indexLifeCycleManager = txnSubsystem.getAsterixAppRuntimeContextProvider()
                 .getIndexLifecycleManager();
         ILSMIndex index = (ILSMIndex) indexLifeCycleManager.getIndex(resourceId);
@@ -56,7 +58,7 @@
         }
 
         try {
-            TransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
+            ITransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
             IModificationOperationCallback modCallback = new PrimaryIndexModificationOperationCallback(datasetId,
                     primaryKeyFields, txnCtx, txnSubsystem.getLockManager(), txnSubsystem, resourceId, resourceType,
                     indexOp);
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallback.java
index 62ec3c9..eee33e9 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallback.java
@@ -15,9 +15,10 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
@@ -29,7 +30,7 @@
 public class PrimaryIndexSearchOperationCallback extends AbstractOperationCallback implements ISearchOperationCallback {
 
     public PrimaryIndexSearchOperationCallback(int datasetId, int[] entityIdFields, ILockManager lockManager,
-            TransactionContext txnCtx) {
+            ITransactionContext txnCtx) {
         super(datasetId, entityIdFields, txnCtx, lockManager);
     }
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallbackFactory.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallbackFactory.java
index fc62b90..5d837b0 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallbackFactory.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/PrimaryIndexSearchOperationCallbackFactory.java
@@ -15,11 +15,12 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallbackFactory;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
@@ -38,9 +39,9 @@
     @Override
     public ISearchOperationCallback createSearchOperationCallback(long resourceId, IHyracksTaskContext ctx)
             throws HyracksDataException {
-        TransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
+        ITransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
         try {
-            TransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
+            ITransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
             return new PrimaryIndexSearchOperationCallback(datasetId, primaryKeyFields, txnSubsystem.getLockManager(),
                     txnCtx);
         } catch (ACIDException e) {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
index 5b55e9a..0e66b32 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallback.java
@@ -15,12 +15,14 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
 import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
@@ -39,10 +41,10 @@
     protected final byte resourceType;
     protected final IndexOperation indexOp;
     protected final IndexOperation oldOp;
-    protected final TransactionSubsystem txnSubsystem;
+    protected final ITransactionSubsystem txnSubsystem;
 
     public SecondaryIndexModificationOperationCallback(int datasetId, int[] primaryKeyFields,
-            TransactionContext txnCtx, ILockManager lockManager, TransactionSubsystem txnSubsystem, long resourceId,
+            ITransactionContext txnCtx, ILockManager lockManager, ITransactionSubsystem txnSubsystem, long resourceId,
             byte resourceType, IndexOperation indexOp) {
         super(datasetId, primaryKeyFields, txnCtx, lockManager);
         this.resourceId = resourceId;
@@ -59,7 +61,7 @@
 
     @Override
     public void found(ITupleReference before, ITupleReference after) throws HyracksDataException {
-        IndexLogger logger = txnSubsystem.getTreeLoggerRepository().getIndexLogger(resourceId, resourceType);
+        ILogger logger = txnSubsystem.getTreeLoggerRepository().getIndexLogger(resourceId, resourceType);
         int pkHash = computePrimaryKeyHashValue(after, primaryKeyFields);
         try {
             IndexOperation effectiveOldOp;
@@ -75,7 +77,7 @@
             } else {
                 effectiveOldOp = oldOp;
             }
-            logger.generateLogRecord(txnSubsystem, txnCtx, datasetId.getId(), pkHash, resourceId, indexOp, after,
+            ((IndexLogger)logger).generateLogRecord(txnSubsystem, txnCtx, datasetId.getId(), pkHash, resourceId, indexOp, after,
                     effectiveOldOp, before);
         } catch (ACIDException e) {
             throw new HyracksDataException(e);
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallbackFactory.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallbackFactory.java
index 672b434..68a09de 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallbackFactory.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexModificationOperationCallbackFactory.java
@@ -15,11 +15,12 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionSubsystemProvider;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallbackFactory;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
@@ -44,7 +45,7 @@
     public IModificationOperationCallback createModificationOperationCallback(long resourceId, Object resource,
             IHyracksTaskContext ctx) throws HyracksDataException {
 
-        TransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
+        ITransactionSubsystem txnSubsystem = txnSubsystemProvider.getTransactionSubsystem(ctx);
         IIndexLifecycleManager indexLifeCycleManager = txnSubsystem.getAsterixAppRuntimeContextProvider()
                 .getIndexLifecycleManager();
         ILSMIndex index = (ILSMIndex) indexLifeCycleManager.getIndex(resourceId);
@@ -53,7 +54,7 @@
         }
 
         try {
-            TransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
+            ITransactionContext txnCtx = txnSubsystem.getTransactionManager().getTransactionContext(jobId);
             return new SecondaryIndexModificationOperationCallback(datasetId, primaryKeyFields, txnCtx,
                     txnSubsystem.getLockManager(), txnSubsystem, resourceId, resourceType, indexOp);
         } catch (ACIDException e) {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexSearchOperationCallback.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexSearchOperationCallback.java
index 4c8a583..e6ce589 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexSearchOperationCallback.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/opcallbacks/SecondaryIndexSearchOperationCallback.java
@@ -15,6 +15,7 @@
 
 package edu.uci.ics.asterix.transaction.management.opcallbacks;
 
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ILocalResourceMetadata.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ILocalResourceMetadata.java
index d2aa164..3b32dc2 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ILocalResourceMetadata.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/ILocalResourceMetadata.java
@@ -2,7 +2,7 @@
 
 import java.io.Serializable;
 
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMBTreeLocalResourceMetadata.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMBTreeLocalResourceMetadata.java
index 7ab0d10..e06b5df 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMBTreeLocalResourceMetadata.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMBTreeLocalResourceMetadata.java
@@ -2,7 +2,7 @@
 
 import java.io.File;
 
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.io.FileReference;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMInvertedIndexLocalResourceMetadata.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMInvertedIndexLocalResourceMetadata.java
index 3bcb747..d56c6ee 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMInvertedIndexLocalResourceMetadata.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMInvertedIndexLocalResourceMetadata.java
@@ -1,6 +1,6 @@
 package edu.uci.ics.asterix.transaction.management.resource;
 
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMRTreeLocalResourceMetadata.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMRTreeLocalResourceMetadata.java
index ff26c54..95fab45 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMRTreeLocalResourceMetadata.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/LSMRTreeLocalResourceMetadata.java
@@ -2,7 +2,7 @@
 
 import java.io.File;
 
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/PersistentLocalResourceRepository.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/PersistentLocalResourceRepository.java
index 01dce6c..191bc8a 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/PersistentLocalResourceRepository.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/resource/PersistentLocalResourceRepository.java
@@ -28,7 +28,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import edu.uci.ics.asterix.transaction.management.service.logging.LogManager;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
 import edu.uci.ics.hyracks.storage.common.file.LocalResource;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DeadlockDetector.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DeadlockDetector.java
index 900725b..600beab 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DeadlockDetector.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DeadlockDetector.java
@@ -2,8 +2,8 @@
 
 import java.util.HashMap;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.JobId;
 
 /**
  * @author pouria, kisskys Performing a BFS search, upon adding each waiter to a waiting
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
index 4f01f37..d846603 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
@@ -1,19 +1,19 @@
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 
 public class JobInfo {
     private EntityInfoManager entityInfoManager;
     private LockWaiterManager lockWaiterManager;
-    private TransactionContext jobCtx;
+    private ITransactionContext jobCtx;
     private int lastHoldingResource; //resource(entity or dataset) which is held by this job lastly
     private int firstWaitingResource; //resource(entity or dataset) which this job is waiting for
     private int upgradingResource; //resource(entity or dataset) which this job is waiting for to upgrade
 
     private PrimitiveIntHashMap datasetISLockHT; //used for keeping dataset-granule-lock's count acquired by this job. 
 
-    public JobInfo(EntityInfoManager entityInfoManager, LockWaiterManager lockWaiterManager, TransactionContext txnCtx) {
+    public JobInfo(EntityInfoManager entityInfoManager, LockWaiterManager lockWaiterManager, ITransactionContext txnCtx) {
         this.entityInfoManager = entityInfoManager;
         this.lockWaiterManager = lockWaiterManager;
         this.jobCtx = txnCtx;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
index a354d2a..8fb7494 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
@@ -22,14 +22,15 @@
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
+import edu.uci.ics.asterix.common.transactions.JobId;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager.TransactionState;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 
@@ -107,12 +108,12 @@
     }
 
     @Override
-    public void lock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext)
+    public void lock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext)
             throws ACIDException {
         internalLock(datasetId, entityHashValue, lockMode, txnContext, false);
     }
 
-    private void internalLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext,
+    private void internalLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext,
             boolean isInstant) throws ACIDException {
 
         JobId jobId = txnContext.getJobId();
@@ -252,7 +253,7 @@
         return;
     }
 
-    private void releaseDatasetISLocks(JobInfo jobInfo, JobId jobId, DatasetId datasetId, TransactionContext txnContext)
+    private void releaseDatasetISLocks(JobInfo jobInfo, JobId jobId, DatasetId datasetId, ITransactionContext txnContext)
             throws ACIDException {
         int entityInfo;
         int prevEntityInfo;
@@ -295,16 +296,16 @@
         }
     }
 
-    private void validateJob(TransactionContext txnContext) throws ACIDException {
+    private void validateJob(ITransactionContext txnContext) throws ACIDException {
         if (txnContext.getTxnState() == TransactionState.ABORTED) {
             throw new ACIDException("" + txnContext.getJobId() + " is in ABORTED state.");
-        } else if (txnContext.getStatus() == TransactionContext.TIMED_OUT_STATUS) {
+        } else if (txnContext.getStatus() == ITransactionContext.TIMED_OUT_STATUS) {
             requestAbort(txnContext);
         }
     }
 
     private int lockDatasetGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext) throws ACIDException {
+            ITransactionContext txnContext) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int dId = datasetId.getId(); //int-type datasetId
@@ -525,7 +526,7 @@
     }
 
     private void lockEntityGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            int entityInfoFromDLockInfo, TransactionContext txnContext) throws ACIDException {
+            int entityInfoFromDLockInfo, ITransactionContext txnContext) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int waiterObjId;
@@ -632,22 +633,22 @@
     }
 
     @Override
-    public void unlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext) throws ACIDException {
+    public void unlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext) throws ACIDException {
         internalUnlock(datasetId, entityHashValue, txnContext, false, false);
     }
 
     @Override
-    public void unlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext, boolean commitFlag)
+    public void unlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext, boolean commitFlag)
             throws ACIDException {
         internalUnlock(datasetId, entityHashValue, txnContext, false, commitFlag);
     }
 
-    private void instantUnlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext)
+    private void instantUnlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext)
             throws ACIDException {
         internalUnlock(datasetId, entityHashValue, txnContext, true, false);
     }
 
-    private void internalUnlock(DatasetId datasetId, int entityHashValue, TransactionContext txnContext,
+    private void internalUnlock(DatasetId datasetId, int entityHashValue, ITransactionContext txnContext,
             boolean isInstant, boolean commitFlag) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int eLockInfo = -1;
@@ -712,7 +713,7 @@
                 //This code should be taken care properly when there is a way to avoid doubling memory space for txnIds.
                 //This commit log is written here in order to avoid increasing the memory space for managing transactionIds
                 if (commitFlag) {
-                    if (txnContext.getTransactionType().equals(TransactionContext.TransactionType.READ_WRITE)) {
+                    if (txnContext.getTransactionType().equals(ITransactionContext.TransactionType.READ_WRITE)) {
                         try {
                             txnSubsystem.getLogManager().log(LogType.ENTITY_COMMIT, txnContext, datasetId.getId(),
                                     entityHashValue, -1, (byte) 0, 0, null, null, logicalLogLocator);
@@ -785,7 +786,7 @@
     }
 
     @Override
-    public void releaseLocks(TransactionContext txnContext) throws ACIDException {
+    public void releaseLocks(ITransactionContext txnContext) throws ACIDException {
         LockWaiter waiterObj;
         int entityInfo;
         int prevEntityInfo;
@@ -962,7 +963,7 @@
             jobHT.remove(jobId);
 
             if (existWaiter) {
-                txnContext.setStatus(TransactionContext.TIMED_OUT_STATUS);
+                txnContext.setStatus(ITransactionContext.TIMED_OUT_STATUS);
                 txnContext.setTxnState(TransactionState.ABORTED);
             }
 
@@ -976,7 +977,7 @@
     }
 
     @Override
-    public void instantLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext)
+    public void instantLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext)
             throws ACIDException {
 
         //        try {
@@ -990,19 +991,19 @@
     }
 
     @Override
-    public boolean tryLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext)
+    public boolean tryLock(DatasetId datasetId, int entityHashValue, byte lockMode, ITransactionContext txnContext)
             throws ACIDException {
         return internalTryLock(datasetId, entityHashValue, lockMode, txnContext, false);
     }
 
     @Override
-    public boolean instantTryLock(DatasetId datasetId, int entityHashValue, byte lockMode, TransactionContext txnContext)
-            throws ACIDException {
+    public boolean instantTryLock(DatasetId datasetId, int entityHashValue, byte lockMode,
+            ITransactionContext txnContext) throws ACIDException {
         return internalInstantTryLock(datasetId, entityHashValue, lockMode, txnContext);
     }
 
     private boolean internalInstantTryLock(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext) throws ACIDException {
+            ITransactionContext txnContext) throws ACIDException {
         DatasetLockInfo dLockInfo = null;
         boolean isSuccess = true;
 
@@ -1065,7 +1066,7 @@
     }
 
     private boolean instantTryLockDatasetGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext, DatasetLockInfo dLockInfo, byte datasetLockMode) throws ACIDException {
+            ITransactionContext txnContext, DatasetLockInfo dLockInfo, byte datasetLockMode) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int dId = datasetId.getId(); //int-type datasetId
@@ -1144,7 +1145,7 @@
     }
 
     private boolean instantTryLockEntityGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext, DatasetLockInfo dLockInfo) throws ACIDException {
+            ITransactionContext txnContext, DatasetLockInfo dLockInfo) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int waiterObjId;
@@ -1205,7 +1206,7 @@
     }
 
     private boolean internalTryLock(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext, boolean isInstant) throws ACIDException {
+            ITransactionContext txnContext, boolean isInstant) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int dId = datasetId.getId(); //int-type datasetId
@@ -1352,7 +1353,7 @@
     }
 
     private void trackLockRequest(String msg, int requestType, DatasetId datasetIdObj, int entityHashValue,
-            byte lockMode, TransactionContext txnContext, DatasetLockInfo dLockInfo, int eLockInfo) {
+            byte lockMode, ITransactionContext txnContext, DatasetLockInfo dLockInfo, int eLockInfo) {
         StringBuilder s = new StringBuilder();
         LockRequest request = new LockRequest(Thread.currentThread().getName(), requestType, datasetIdObj,
                 entityHashValue, lockMode, txnContext);
@@ -1425,7 +1426,7 @@
     }
 
     private void revertTryLockDatasetGranuleOperation(DatasetId datasetId, int entityHashValue, byte lockMode,
-            int entityInfo, TransactionContext txnContext) {
+            int entityInfo, ITransactionContext txnContext) {
         JobId jobId = txnContext.getJobId();
         DatasetLockInfo dLockInfo;
         JobInfo jobInfo;
@@ -1483,7 +1484,7 @@
     }
 
     private int tryLockDatasetGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            TransactionContext txnContext) throws ACIDException {
+            ITransactionContext txnContext) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int dId = datasetId.getId(); //int-type datasetId
@@ -1645,7 +1646,7 @@
     }
 
     private boolean tryLockEntityGranule(DatasetId datasetId, int entityHashValue, byte lockMode,
-            int entityInfoFromDLockInfo, TransactionContext txnContext) throws ACIDException {
+            int entityInfoFromDLockInfo, ITransactionContext txnContext) throws ACIDException {
         JobId jobId = txnContext.getJobId();
         int jId = jobId.getId(); //int-type jobId
         int waiterObjId;
@@ -1735,7 +1736,7 @@
     }
 
     private int handleLockWaiter(DatasetLockInfo dLockInfo, int eLockInfo, int entityInfo, boolean isUpgrade,
-            boolean isDatasetLockInfo, TransactionContext txnContext, JobInfo jobInfo, int duplicatedWaiterObjId)
+            boolean isDatasetLockInfo, ITransactionContext txnContext, JobInfo jobInfo, int duplicatedWaiterObjId)
             throws ACIDException {
         int waiterId = -1;
         LockWaiter waiter;
@@ -1812,7 +1813,7 @@
             //waiter woke up -> remove/deallocate waiter object and abort if timeout
             latchLockTable();
 
-            if (txnContext.getStatus() == TransactionContext.TIMED_OUT_STATUS || waiter.isVictim()) {
+            if (txnContext.getStatus() == ITransactionContext.TIMED_OUT_STATUS || waiter.isVictim()) {
                 requestAbort(txnContext);
             }
 
@@ -1868,9 +1869,9 @@
         return deadlockDetector.isSafeToAdd(dLockInfo, eLockInfo, entityInfo, isDatasetLockInfo, isUpgrade);
     }
 
-    private void requestAbort(TransactionContext txnContext) throws ACIDException {
-        txnContext.setStatus(TransactionContext.TIMED_OUT_STATUS);
-        txnContext.setStartWaitTime(TransactionContext.INVALID_TIME);
+    private void requestAbort(ITransactionContext txnContext) throws ACIDException {
+        txnContext.setStatus(ITransactionContext.TIMED_OUT_STATUS);
+        txnContext.setStartWaitTime(ITransactionContext.INVALID_TIME);
         throw new ACIDException("Transaction " + txnContext.getJobId()
                 + " should abort (requested by the Lock Manager)");
     }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerDeterministicUnitTest.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerDeterministicUnitTest.java
index c3b47bc..0781276 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerDeterministicUnitTest.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerDeterministicUnitTest.java
@@ -7,10 +7,11 @@
 import java.util.NoSuchElementException;
 import java.util.Scanner;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager.TransactionState;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerRandomUnitTest.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerRandomUnitTest.java
index 89a15ef..b2cc6ab 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerRandomUnitTest.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManagerRandomUnitTest.java
@@ -3,10 +3,12 @@
 import java.util.ArrayList;
 import java.util.Random;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager.TransactionState;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
@@ -502,14 +504,14 @@
     public DatasetId datasetIdObj;
     public int entityHashValue;
     public byte lockMode;
-    public TransactionContext txnContext;
+    public ITransactionContext txnContext;
     public boolean isUpgrade;
     public boolean isTryLockFailed;
     public long requestTime;
     public String threadName;
 
     public LockRequest(String threadName, int requestType, DatasetId datasetIdObj, int entityHashValue, byte lockMode,
-            TransactionContext txnContext) {
+            ITransactionContext txnContext) {
         this.requestType = requestType;
         this.datasetIdObj = datasetIdObj;
         this.entityHashValue = entityHashValue;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockMgrLatchHandlerException.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockMgrLatchHandlerException.java
index 05a582c..84ba407 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockMgrLatchHandlerException.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockMgrLatchHandlerException.java
@@ -14,7 +14,7 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 public class LockMgrLatchHandlerException extends ACIDException {
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
index 6bc8c6b..a53c890 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
@@ -2,7 +2,7 @@
 
 import java.util.LinkedList;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 /**
  * @author pouria, kisskys
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/Buffer.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/Buffer.java
index 23a60f7..284b081 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/Buffer.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/Buffer.java
@@ -17,6 +17,8 @@
 import java.nio.ByteBuffer;
 import java.util.Arrays;
 
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+
 /**
  * Represents a wrapper over @see ByteBuffer supporting some custom APIs for
  * transaction support. This class is not "thread-safe". For performance
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/DataUtil.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/DataUtil.java
index 91ce7ed5..0d8448c 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/DataUtil.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/DataUtil.java
@@ -16,6 +16,8 @@
 
 import java.util.zip.CRC32;
 
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+
 /**
  * A utility class for doing bit level operations such as forming checksum or
  * converting between Integer and byte array. Used extensively during writing
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/GenericFilter.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/GenericFilter.java
index 6bb644d..e9ec4fa 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/GenericFilter.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/GenericFilter.java
@@ -17,6 +17,9 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogFilter;
+
 /*
  *  A generic filter that encompasses one or more filters (see @ILogFiler) that may be applied when selectively retrieving logs.
  *  The contained filters are assumed to form a conjunction.   
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogger.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogger.java
deleted file mode 100644
index e26a3cc..0000000
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/ILogger.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.asterix.transaction.management.service.logging;
-
-
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger.ReusableLogContentObject;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-
-/**
- * An interface providing call back APIs that are invoked {@link ILogManager} for providing the content for the log record and doing any pre/post
- * processing.
- */
-public interface ILogger {
-
-    public void preLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException;
-
-    public void log(TransactionContext context, final LogicalLogLocator logicalLogLocator, int logContentSize,
-            ReusableLogContentObject reusableLogContentObject) throws ACIDException;
-
-    public void postLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException;
-
-}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLogger.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLogger.java
index d69a36e..ca30124 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLogger.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLogger.java
@@ -18,11 +18,14 @@
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.resource.ICloseable;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ICloseable;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.ReusableLogContentObject;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
@@ -53,14 +56,14 @@
         this.tupleWriter = new SimpleTupleWriter();
     }
 
-    public synchronized void close(TransactionContext context) {
+    public synchronized void close(ITransactionContext context) {
         ReusableLogContentObjectRepository txnThreadStateRepository = (ReusableLogContentObjectRepository) jobId2ReusableLogContentObjectRepositoryMap
                 .get(context.getJobId());
         txnThreadStateRepository.remove(Thread.currentThread().getId());
         jobId2ReusableLogContentObjectRepositoryMap.remove(context.getJobId());
     }
 
-    public void generateLogRecord(TransactionSubsystem txnSubsystem, TransactionContext context, int datasetId,
+    public void generateLogRecord(ITransactionSubsystem txnSubsystem, ITransactionContext context, int datasetId,
             int PKHashValue, long resourceId, IndexOperation newOperation, ITupleReference newValue,
             IndexOperation oldOperation, ITupleReference oldValue) throws ACIDException {
 
@@ -120,7 +123,7 @@
     }
 
     @Override
-    public void log(TransactionContext context, LogicalLogLocator logicalLogLocator, int logContentSize,
+    public void log(ITransactionContext context, LogicalLogLocator logicalLogLocator, int logContentSize,
             ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         int offset = 0;
         int tupleSize = 0;
@@ -175,12 +178,12 @@
     }
 
     @Override
-    public void postLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject)
+    public void postLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject)
             throws ACIDException {
     }
 
     @Override
-    public void preLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject)
+    public void preLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject)
             throws ACIDException {
     }
 
@@ -207,67 +210,4 @@
         }
     }
 
-    /**
-     * Represents the state of a transaction thread. The state contains information
-     * that includes the tuple being operated, the operation and the location of the
-     * log record corresponding to the operation.
-     */
-    public class ReusableLogContentObject {
-
-        private LogicalLogLocator logicalLogLocator;
-        private IndexOperation newOperation;
-        private ITupleReference newValue;
-        private IndexOperation oldOperation;
-        private ITupleReference oldValue;
-
-        public ReusableLogContentObject(LogicalLogLocator logicalLogLocator, IndexOperation newOperation,
-                ITupleReference newValue, IndexOperation oldOperation, ITupleReference oldValue) {
-            this.logicalLogLocator = logicalLogLocator;
-            this.newOperation = newOperation;
-            this.newValue = newValue;
-            this.oldOperation = oldOperation;
-            this.oldValue = oldValue;
-        }
-
-        public synchronized LogicalLogLocator getLogicalLogLocator() {
-            return logicalLogLocator;
-        }
-
-        public synchronized void setLogicalLogLocator(LogicalLogLocator logicalLogLocator) {
-            this.logicalLogLocator = logicalLogLocator;
-        }
-
-        public synchronized void setNewOperation(IndexOperation newOperation) {
-            this.newOperation = newOperation;
-        }
-
-        public synchronized IndexOperation getNewOperation() {
-            return newOperation;
-        }
-
-        public synchronized void setNewValue(ITupleReference newValue) {
-            this.newValue = newValue;
-        }
-
-        public synchronized ITupleReference getNewValue() {
-            return newValue;
-        }
-
-        public synchronized void setOldOperation(IndexOperation oldOperation) {
-            this.oldOperation = oldOperation;
-        }
-
-        public synchronized IndexOperation getOldOperation() {
-            return oldOperation;
-        }
-
-        public synchronized void setOldValue(ITupleReference oldValue) {
-            this.oldValue = oldValue;
-        }
-
-        public synchronized ITupleReference getOldValue() {
-            return oldValue;
-        }
-    }
-
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLoggerRepository.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLoggerRepository.java
index da5042c..c51bb11 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLoggerRepository.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexLoggerRepository.java
@@ -17,24 +17,27 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.MutableResourceId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.ILoggerRepository;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.MutableResourceId;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 
-public class IndexLoggerRepository {
+public class IndexLoggerRepository implements ILoggerRepository {
 
-    private final Map<MutableResourceId, IndexLogger> loggers = new HashMap<MutableResourceId, IndexLogger>();
-    private final TransactionSubsystem txnSubsystem;
+    private final Map<MutableResourceId, ILogger> loggers = new HashMap<MutableResourceId, ILogger>();
+    private final ITransactionSubsystem txnSubsystem;
     private MutableResourceId mutableResourceId;
 
-    public IndexLoggerRepository(TransactionSubsystem provider) {
+    public IndexLoggerRepository(ITransactionSubsystem provider) {
         this.txnSubsystem = provider;
         mutableResourceId = new MutableResourceId(0);
     }
 
-    public synchronized IndexLogger getIndexLogger(long resourceId, byte resourceType) {
+    @Override
+    public synchronized ILogger getIndexLogger(long resourceId, byte resourceType) {
         mutableResourceId.setId(resourceId);
-        IndexLogger logger = loggers.get(mutableResourceId);
+        ILogger logger = loggers.get(mutableResourceId);
         if (logger == null) {
             MutableResourceId newMutableResourceId = new MutableResourceId(resourceId);
             IIndex index = (IIndex) txnSubsystem.getAsterixAppRuntimeContextProvider().getIndexLifecycleManager()
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexResourceManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexResourceManager.java
index 7ecfa69..ce3401c 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexResourceManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/IndexResourceManager.java
@@ -14,9 +14,11 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.logging;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.IResourceManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
@@ -28,9 +30,9 @@
 
     public final byte resourceType;
 
-    private final TransactionSubsystem txnSubsystem;
+    private final ITransactionSubsystem txnSubsystem;
 
-    public IndexResourceManager(byte resourceType, TransactionSubsystem provider) {
+    public IndexResourceManager(byte resourceType, ITransactionSubsystem provider) {
         this.resourceType = resourceType;
         this.txnSubsystem = provider;
     }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogCursor.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogCursor.java
index 7e954d8..f452631 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogCursor.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogCursor.java
@@ -17,7 +17,15 @@
 import java.io.File;
 import java.io.IOException;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.FileUtil;
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+import edu.uci.ics.asterix.common.transactions.IFileBasedBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogCursor;
+import edu.uci.ics.asterix.common.transactions.ILogFilter;
+import edu.uci.ics.asterix.common.transactions.LogManagerProperties;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
 
 public class LogCursor implements ILogCursor {
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
index 38d39cc..318996a 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
@@ -31,8 +31,20 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger.ReusableLogContentObject;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.FileBasedBuffer;
+import edu.uci.ics.asterix.common.transactions.FileUtil;
+import edu.uci.ics.asterix.common.transactions.IFileBasedBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogCursor;
+import edu.uci.ics.asterix.common.transactions.ILogFilter;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.LogManagerProperties;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.ReusableLogContentObject;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
@@ -78,7 +90,7 @@
      */
     private AtomicLong lsn = new AtomicLong(0);
 
-    private List<HashMap<TransactionContext, Integer>> activeTxnCountMaps;
+    private List<HashMap<ITransactionContext, Integer>> activeTxnCountMaps;
 
     public void addFlushRequest(int pageIndex, long lsn, boolean isSynchronous) {
         logPageFlusher.requestFlush(pageIndex, lsn, isSynchronous);
@@ -147,9 +159,10 @@
     private void initLogManager() throws ACIDException {
         logRecordHelper = new LogRecordHelper(this);
         numLogPages = logManagerProperties.getNumLogPages();
-        activeTxnCountMaps = new ArrayList<HashMap<TransactionContext, Integer>>(numLogPages);
+        activeTxnCountMaps = new ArrayList<HashMap<ITransactionContext, Integer>>(numLogPages);
+
         for (int i = 0; i < numLogPages; i++) {
-            activeTxnCountMaps.add(new HashMap<TransactionContext, Integer>());
+            activeTxnCountMaps.add(new HashMap<ITransactionContext, Integer>());
         }
 
         logPages = new FileBasedBuffer[numLogPages];
@@ -264,10 +277,10 @@
                 // space in the log page and hence is an owner.
                 logPages[prevPage].incRefCnt();
                 logPages[prevPage].releaseReadLatch();
-                
+
                 // forward the nextWriteOffset in the log page
                 logPages[prevPage].setBufferNextWriteOffset(logPageSize);
-                
+
                 logPages[prevPage].decRefCnt();
 
                 addFlushRequest(prevPage, old, false);
@@ -298,11 +311,11 @@
     }
 
     @Override
-    public void log(byte logType, TransactionContext txnCtx, int datasetId, int PKHashValue, long resourceId,
+    public void log(byte logType, ITransactionContext txnCtx, int datasetId, int PKHashValue, long resourceId,
             byte resourceMgrId, int logContentSize, ReusableLogContentObject reusableLogContentObject, ILogger logger,
             LogicalLogLocator logicalLogLocator) throws ACIDException {
 
-        HashMap<TransactionContext, Integer> map = null;
+        HashMap<ITransactionContext, Integer> map = null;
         int activeTxnCount;
 
         // logLocator is a re-usable object that is appropriately set in each
@@ -721,14 +734,14 @@
     }
 
     public void decrementActiveTxnCountOnIndexes(int pageIndex) throws HyracksDataException {
-        TransactionContext ctx = null;
+        ITransactionContext ctx = null;
         int count = 0;
         int i = 0;
 
-        HashMap<TransactionContext, Integer> map = activeTxnCountMaps.get(pageIndex);
-        Set<Map.Entry<TransactionContext, Integer>> entrySet = map.entrySet();
+        HashMap<ITransactionContext, Integer> map = activeTxnCountMaps.get(pageIndex);
+        Set<Map.Entry<ITransactionContext, Integer>> entrySet = map.entrySet();
         if (entrySet != null) {
-            for (Map.Entry<TransactionContext, Integer> entry : entrySet) {
+            for (Map.Entry<ITransactionContext, Integer> entry : entrySet) {
                 if (entry != null) {
                     if (entry.getValue() != null) {
                         count = entry.getValue();
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecordHelper.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecordHelper.java
index 1b65d8f..ed30b88 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecordHelper.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogRecordHelper.java
@@ -14,7 +14,12 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.logging;
 
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.LogManagerProperties;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
 
 /**
  * An implementation of the @see ILogRecordHelper interface that provides API
@@ -63,9 +68,7 @@
     private final int RESOURCE_ID_POS = 25;
     private final int RESOURCE_MGR_ID_POS = 33;
     private final int LOG_RECORD_SIZE_POS = 34;
-    
 
-    
     private ILogManager logManager;
 
     public LogRecordHelper(ILogManager logManager) {
@@ -181,7 +184,7 @@
     }
 
     @Override
-    public void writeLogHeader(LogicalLogLocator logicalLogLocator, byte logType, TransactionContext context,
+    public void writeLogHeader(LogicalLogLocator logicalLogLocator, byte logType, ITransactionContext context,
             int datasetId, int PKHashValue, long prevLogicalLogLocator, long resourceId, byte resourceMgrId,
             int logRecordSize) {
 
@@ -258,8 +261,8 @@
     public int getLogChecksumSize() {
         return LOG_CHECKSUM_SIZE;
     }
-    
+
     public int getCommitLogSize() {
         return COMMIT_LOG_SIZE;
     }
-}
+}
\ No newline at end of file
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogUtil.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogUtil.java
index 77a99bc..e57bf32 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogUtil.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogUtil.java
@@ -24,7 +24,13 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.FileUtil;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.LogManagerProperties;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
+
 
 /**
  * A utility class providing helper methods for the {@link ILogManager}
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/CheckpointThread.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/CheckpointThread.java
index 3eb87bc..a934d6c 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/CheckpointThread.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/CheckpointThread.java
@@ -2,7 +2,8 @@
 
 import java.util.List;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.IndexOperationTracker;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
index 47c5dcb..50d4625 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
@@ -34,23 +34,25 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogCursor;
+import edu.uci.ics.asterix.common.transactions.ILogFilter;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
+import edu.uci.ics.asterix.common.transactions.IResourceManager;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.IndexOperationTracker;
 import edu.uci.ics.asterix.transaction.management.resource.ILocalResourceMetadata;
-import edu.uci.ics.asterix.transaction.management.service.logging.IBuffer;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogCursor;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogFilter;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogRecordHelper;
 import edu.uci.ics.asterix.transaction.management.service.logging.IndexResourceManager;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogManager;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.logging.PhysicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManager;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
@@ -611,7 +613,7 @@
      * @see edu.uci.ics.transaction.management.service.recovery.IRecoveryManager# rollbackTransaction (edu.uci.ics.TransactionContext.management.service.transaction .TransactionContext)
      */
     @Override
-    public void rollbackTransaction(TransactionContext txnContext) throws ACIDException {
+    public void rollbackTransaction(ITransactionContext txnContext) throws ACIDException {
         ILogManager logManager = txnSubsystem.getLogManager();
         ILogRecordHelper logRecordHelper = logManager.getLogRecordHelper();
         Map<TxnId, List<Long>> loserTxnTable = new HashMap<TxnId, List<Long>>();
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/TransactionTableEntry.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/TransactionTableEntry.java
index 9bfcc8f..15e21bc 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/TransactionTableEntry.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/TransactionTableEntry.java
@@ -14,8 +14,8 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.recovery;
 
-import edu.uci.ics.asterix.transaction.management.service.logging.PhysicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
 
 /**
  * Represents a bookkeeping data-structure that is populated duing the analysis
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixRuntimeComponentsProvider.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/AsterixRuntimeComponentsProvider.java
similarity index 76%
rename from asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixRuntimeComponentsProvider.java
rename to asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/AsterixRuntimeComponentsProvider.java
index fad0a38..b1cdd15 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/context/AsterixRuntimeComponentsProvider.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/AsterixRuntimeComponentsProvider.java
@@ -1,5 +1,6 @@
-package edu.uci.ics.asterix.common.context;
+package edu.uci.ics.asterix.transaction.management.service.transaction;
 
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMBTreeIOOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMInvertedIndexIOOperationCallbackFactory;
 import edu.uci.ics.asterix.transaction.management.ioopcallbacks.LSMRTreeIOOperationCallbackFactory;
@@ -23,9 +24,9 @@
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceRepository;
 import edu.uci.ics.hyracks.storage.common.file.ResourceIdFactory;
 
-public class AsterixRuntimeComponentsProvider implements IIndexLifecycleManagerProvider, IStorageManagerInterface,
-        ILSMIOOperationSchedulerProvider, ILSMMergePolicyProvider, ILSMOperationTrackerFactory,
-        ILSMIOOperationCallbackProvider {
+public class AsterixRuntimeComponentsProvider implements 
+        IIndexLifecycleManagerProvider, IStorageManagerInterface, ILSMIOOperationSchedulerProvider,
+        ILSMMergePolicyProvider, ILSMOperationTrackerFactory, ILSMIOOperationCallbackProvider {
     private static final long serialVersionUID = 1L;
 
     private final ILSMIOOperationCallbackFactory ioOpCallbackFactory;
@@ -54,43 +55,45 @@
 
     @Override
     public ILSMIOOperationScheduler getIOScheduler(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getLSMIOScheduler();
     }
 
     @Override
     public ILSMMergePolicy getMergePolicy(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getLSMMergePolicy();
     }
 
     @Override
     public IBufferCache getBufferCache(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getBufferCache();
     }
 
     @Override
     public IFileMapProvider getFileMapProvider(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getFileMapManager();
     }
 
     @Override
     public ILocalResourceRepository getLocalResourceRepository(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getLocalResourceRepository();
     }
 
     @Override
     public IIndexLifecycleManager getLifecycleManager(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getIndexLifecycleManager();
     }
 
     @Override
     public ResourceIdFactory getResourceIdFactory(IHyracksTaskContext ctx) {
-        return ((AsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
+        return ((IAsterixAppRuntimeContext) ctx.getJobletContext().getApplicationContext().getApplicationObject())
                 .getResourceIdFactory();
     }
+
+  
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobIdFactory.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobIdFactory.java
index cac4f8e..8f9fa79 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobIdFactory.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/JobIdFactory.java
@@ -16,6 +16,8 @@
 
 import java.util.concurrent.atomic.AtomicInteger;
 
+import edu.uci.ics.asterix.common.transactions.JobId;
+
 /**
  * Represents a factory to generate unique transaction IDs.
  */
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
index 5b01edf..2659d8f 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
@@ -19,15 +19,16 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.concurrent.atomic.AtomicInteger;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.opcallbacks.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.AbstractOperationCallback;
+import edu.uci.ics.asterix.common.transactions.ICloseable;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
+import edu.uci.ics.asterix.common.transactions.JobId;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.IndexOperationTracker;
-import edu.uci.ics.asterix.transaction.management.resource.ICloseable;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager.TransactionState;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
@@ -40,17 +41,7 @@
  * initiate an operation on the behalf of the transaction associated with the
  * context.
  */
-public class TransactionContext implements Serializable {
-
-    public static final long INVALID_TIME = -1l; // used for showing a
-    // transaction is not waiting.
-    public static final int ACTIVE_STATUS = 0;
-    public static final int TIMED_OUT_STATUS = 1;
-
-    public enum TransactionType {
-        READ,
-        READ_WRITE
-    }
+public class TransactionContext implements ITransactionContext, Serializable {
 
     private static final long serialVersionUID = -6105616785783310111L;
     private TransactionSubsystem transactionSubsystem;
@@ -170,7 +161,7 @@
             closeable.close(this);
         }
     }
-    
+
     @Override
     public int hashCode() {
         return jobId.getId();
@@ -180,4 +171,6 @@
     public boolean equals(Object o) {
         return (o == this);
     }
+
+  
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
index d3294d0..4e8808f 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
@@ -20,9 +20,12 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 /**
  * An implementation of the @see ITransactionManager interface that provides
@@ -31,7 +34,7 @@
 public class TransactionManager implements ITransactionManager {
     private static final Logger LOGGER = Logger.getLogger(TransactionManager.class.getName());
     private final TransactionSubsystem transactionProvider;
-    private Map<JobId, TransactionContext> transactionContextRepository = new HashMap<JobId, TransactionContext>();
+    private Map<JobId, ITransactionContext> ITransactionContextRepository = new HashMap<JobId, ITransactionContext>();
     private AtomicInteger maxJobId = new AtomicInteger(0);
 
     public TransactionManager(TransactionSubsystem provider) {
@@ -39,7 +42,7 @@
     }
 
     @Override
-    public void abortTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal)
+    public void abortTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal)
             throws ACIDException {
         synchronized (txnContext) {
             if (txnContext.getTxnState().equals(TransactionState.ABORTED)) {
@@ -58,39 +61,39 @@
             } finally {
                 txnContext.releaseResources();
                 transactionProvider.getLockManager().releaseLocks(txnContext);
-                transactionContextRepository.remove(txnContext.getJobId());
+                ITransactionContextRepository.remove(txnContext.getJobId());
                 txnContext.setTxnState(TransactionState.ABORTED);
             }
         }
     }
 
     @Override
-    public TransactionContext beginTransaction(JobId jobId) throws ACIDException {
+    public ITransactionContext beginTransaction(JobId jobId) throws ACIDException {
         setMaxJobId(jobId.getId());
-        TransactionContext txnContext = new TransactionContext(jobId, transactionProvider);
+        ITransactionContext txnContext = new TransactionContext(jobId, transactionProvider);
         synchronized (this) {
-            transactionContextRepository.put(jobId, txnContext);
+            ITransactionContextRepository.put(jobId, txnContext);
         }
         return txnContext;
     }
 
     @Override
-    public TransactionContext getTransactionContext(JobId jobId) throws ACIDException {
+    public ITransactionContext getTransactionContext(JobId jobId) throws ACIDException {
         setMaxJobId(jobId.getId());
-        synchronized (transactionContextRepository) {
+        synchronized (ITransactionContextRepository) {
 
-            TransactionContext context = transactionContextRepository.get(jobId);
+            ITransactionContext context = ITransactionContextRepository.get(jobId);
             if (context == null) {
-                context = transactionContextRepository.get(jobId);
+                context = ITransactionContextRepository.get(jobId);
                 context = new TransactionContext(jobId, transactionProvider);
-                transactionContextRepository.put(jobId, context);
+                ITransactionContextRepository.put(jobId, context);
             }
             return context;
         }
     }
 
     @Override
-    public void commitTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal)
+    public void commitTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal)
             throws ACIDException {
         synchronized (txnContext) {
             if ((txnContext.getTxnState().equals(TransactionState.COMMITTED))) {
@@ -116,7 +119,7 @@
 
             //for job-level commit
             try {
-                if (txnContext.getTransactionType().equals(TransactionContext.TransactionType.READ_WRITE)) {
+                if (txnContext.getTransactionType().equals(ITransactionContext.TransactionType.READ_WRITE)) {
                     transactionProvider.getLogManager().log(LogType.COMMIT, txnContext, -1, -1, -1, (byte) 0, 0, null,
                             null, txnContext.getLastLogLocator());
                 }
@@ -128,14 +131,14 @@
             } finally {
                 txnContext.releaseResources();
                 transactionProvider.getLockManager().releaseLocks(txnContext); // release
-                transactionContextRepository.remove(txnContext.getJobId());
+                ITransactionContextRepository.remove(txnContext.getJobId());
                 txnContext.setTxnState(TransactionState.COMMITTED);
             }
         }
     }
 
     @Override
-    public void completedTransaction(TransactionContext txnContext, DatasetId datasetId, int PKHashVal, boolean success)
+    public void completedTransaction(ITransactionContext txnContext, DatasetId datasetId, int PKHashVal, boolean success)
             throws ACIDException {
         if (!success) {
             abortTransaction(txnContext, datasetId, PKHashVal);
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystem.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystem.java
index c83b7bc..eb6e9a2 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystem.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystem.java
@@ -14,23 +14,25 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.transaction;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.resource.TransactionalResourceManagerRepository;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IAsterixAppRuntimeContextProvider;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.asterix.common.transactions.TransactionalResourceManagerRepository;
 import edu.uci.ics.asterix.transaction.management.service.locking.LockManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogManager;
 import edu.uci.ics.asterix.transaction.management.service.logging.IndexLoggerRepository;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogManager;
 import edu.uci.ics.asterix.transaction.management.service.recovery.CheckpointThread;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IAsterixAppRuntimeContextProvider;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager;
 import edu.uci.ics.asterix.transaction.management.service.recovery.RecoveryManager;
 
 /**
  * Provider for all the sub-systems (transaction/lock/log/recovery) managers.
  * Users of transaction sub-systems must obtain them from the provider.
  */
-public class TransactionSubsystem {
+public class TransactionSubsystem implements ITransactionSubsystem {
     private final String id;
     private final ILogManager logManager;
     private final ILockManager lockManager;
@@ -52,10 +54,10 @@
         this.resourceRepository = new TransactionalResourceManagerRepository();
         this.asterixAppRuntimeContextProvider = asterixAppRuntimeContextProvider;
         if (asterixAppRuntimeContextProvider != null) {
-	        this.checkpointThread = new CheckpointThread(recoveryManager,
-	                asterixAppRuntimeContextProvider.getIndexLifecycleManager(), 0);
+            this.checkpointThread = new CheckpointThread(recoveryManager,
+                    asterixAppRuntimeContextProvider.getIndexLifecycleManager(), 0);
         } else {
-        	this.checkpointThread = null;
+            this.checkpointThread = null;
         }
     }
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystemProvider.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystemProvider.java
new file mode 100644
index 0000000..ab89ef4
--- /dev/null
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionSubsystemProvider.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.asterix.transaction.management.service.transaction;
+
+import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.context.ITransactionSubsystemProvider;
+import edu.uci.ics.asterix.common.transactions.ITransactionSubsystem;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+
+/**
+ * The purpose of this provider is to work around a cyclic dependency between asterix-common and asterix-transactions.
+ * The operation callbacks would depend on the AsterixAppRuntimeContext to get the transaction subsystem,
+ * while at the same time the AsterixAppRuntimeContext depends on asterix-transactions for the TransactionSubsystem.
+ */
+public class TransactionSubsystemProvider implements ITransactionSubsystemProvider {
+    @Override
+    public ITransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx) {
+        IAsterixAppRuntimeContext runtimeCtx = (IAsterixAppRuntimeContext) ctx.getJobletContext()
+                .getApplicationContext().getApplicationObject();
+        return runtimeCtx.getTransactionSubsystem();
+    }
+}
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/BasicLogger.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/BasicLogger.java
index c9d01a0..076227b 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/BasicLogger.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/BasicLogger.java
@@ -16,19 +16,19 @@
 
 import java.util.Random;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IBuffer;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogger;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger.ReusableLogContentObject;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.ReusableLogContentObject;
 
 public class BasicLogger implements ILogger {
 
     private static long averageContentCreationTime = 0;
     private static long count = 0;
 
-    public void log(TransactionContext context, LogicalLogLocator wMemLSN, int length,
+    public void log(ITransactionContext context, LogicalLogLocator wMemLSN, int length,
             ReusableLogContentObject reusableLogContentObject) throws ACIDException {
 
         byte[] logContent = getRandomBytes(length);
@@ -66,12 +66,12 @@
         return averageContentCreationTime;
     }
 
-    public void postLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
+    public void postLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         // TODO Auto-generated method stub
 
     }
 
-    public void preLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
+    public void preLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         // TODO Auto-generated method stub
 
     }
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/IResource.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/IResource.java
index fbc44da..a0e0980 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/IResource.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/IResource.java
@@ -14,7 +14,7 @@
  */
 package edu.uci.ics.asterix.transaction.management.logging;
 
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogger;
+import edu.uci.ics.asterix.common.transactions.ILogger;
 
 public interface IResource {
 
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/RecoverySimulator.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/RecoverySimulator.java
index 54ec036..07f7474 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/RecoverySimulator.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/RecoverySimulator.java
@@ -16,8 +16,8 @@
 
 import java.io.IOException;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 
 public class RecoverySimulator {
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/TransactionWorkloadSimulator.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/TransactionWorkloadSimulator.java
index dcd644d..8f56e3b 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/TransactionWorkloadSimulator.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/logging/test/TransactionWorkloadSimulator.java
@@ -18,18 +18,18 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.IResourceManager;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.logging.BasicLogger;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogRecordHelper;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogActionType;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
 import edu.uci.ics.asterix.transaction.management.service.transaction.JobIdFactory;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileLogger.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileLogger.java
index 54bb0b8..3b251bc 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileLogger.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileLogger.java
@@ -15,12 +15,12 @@
 package edu.uci.ics.asterix.transaction.management.test;
 
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.ReusableLogContentObject;
 import edu.uci.ics.asterix.transaction.management.logging.IResource;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogger;
-import edu.uci.ics.asterix.transaction.management.service.logging.IndexLogger.ReusableLogContentObject;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 
 class FileLogger implements ILogger {
 
@@ -39,13 +39,13 @@
     }
 
     @Override
-    public void preLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
+    public void preLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         // TODO Auto-generated method stub
 
     }
 
     @Override
-    public void log(TransactionContext context, final LogicalLogLocator memLSN, int logContentSize,
+    public void log(ITransactionContext context, final LogicalLogLocator memLSN, int logContentSize,
             ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         byte[] buffer = memLSN.getBuffer().getArray();
         byte[] content = logRecordContent.getBytes();
@@ -58,7 +58,7 @@
     }
 
     @Override
-    public void postLog(TransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
+    public void postLog(ITransactionContext context, ReusableLogContentObject reusableLogContentObject) throws ACIDException {
         // TODO Auto-generated method stub
 
     }
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResource.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResource.java
index bc1a6f0..fc1eb86 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResource.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResource.java
@@ -21,9 +21,9 @@
 import java.io.FileWriter;
 import java.io.IOException;
 
+import edu.uci.ics.asterix.common.transactions.FileUtil;
+import edu.uci.ics.asterix.common.transactions.ILogger;
 import edu.uci.ics.asterix.transaction.management.logging.IResource;
-import edu.uci.ics.asterix.transaction.management.service.logging.FileUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogger;
 
 class FileResource implements IResource {
 
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResourceManager.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResourceManager.java
index 6014003..f47b1df 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResourceManager.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/FileResourceManager.java
@@ -17,11 +17,11 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.IResourceManager;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.logging.IResource;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogRecordHelper;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
 
 class FileResourceManager implements IResourceManager {
 
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/LogRecordReader.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/LogRecordReader.java
index ad1238a..1aa8454 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/LogRecordReader.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/LogRecordReader.java
@@ -15,19 +15,17 @@
 package edu.uci.ics.asterix.transaction.management.test;
 
 import java.io.IOException;
-import java.util.Properties;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
-import edu.uci.ics.asterix.transaction.management.service.logging.IBuffer;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogCursor;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogFilter;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogRecordHelper;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.IBuffer;
+import edu.uci.ics.asterix.common.transactions.ILogCursor;
+import edu.uci.ics.asterix.common.transactions.ILogFilter;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogRecordHelper;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
+import edu.uci.ics.asterix.common.transactions.PhysicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogManagerProperties;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.logging.PhysicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 
 public class LogRecordReader {
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionRecoverySimulator.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionRecoverySimulator.java
index 2bd277c..ccd83eb 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionRecoverySimulator.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionRecoverySimulator.java
@@ -14,7 +14,7 @@
  */
 package edu.uci.ics.asterix.transaction.management.test;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 public class TransactionRecoverySimulator {
 
diff --git a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionSimulator.java b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionSimulator.java
index 092f2ed..66e9bdf 100644
--- a/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionSimulator.java
+++ b/asterix-transactions/src/test/java/edu/uci/ics/asterix/transaction/management/test/TransactionSimulator.java
@@ -17,23 +17,22 @@
 import java.io.IOException;
 import java.util.Random;
 
-import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.asterix.common.exceptions.ACIDException;
+import edu.uci.ics.asterix.common.transactions.DatasetId;
+import edu.uci.ics.asterix.common.transactions.ILockManager;
+import edu.uci.ics.asterix.common.transactions.ILogManager;
+import edu.uci.ics.asterix.common.transactions.ILogger;
+import edu.uci.ics.asterix.common.transactions.IRecoveryManager;
+import edu.uci.ics.asterix.common.transactions.IResourceManager;
+import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
+import edu.uci.ics.asterix.common.transactions.ITransactionContext;
+import edu.uci.ics.asterix.common.transactions.ITransactionManager;
+import edu.uci.ics.asterix.common.transactions.JobId;
+import edu.uci.ics.asterix.common.transactions.LogicalLogLocator;
 import edu.uci.ics.asterix.transaction.management.logging.IResource;
-import edu.uci.ics.asterix.transaction.management.service.locking.ILockManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogManager;
-import edu.uci.ics.asterix.transaction.management.service.logging.ILogger;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
-import edu.uci.ics.asterix.transaction.management.service.logging.LogicalLogLocator;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager;
-import edu.uci.ics.asterix.transaction.management.service.recovery.IRecoveryManager.SystemState;
-import edu.uci.ics.asterix.transaction.management.service.transaction.DatasetId;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.IResourceManager.ResourceType;
-import edu.uci.ics.asterix.transaction.management.service.transaction.ITransactionManager;
-import edu.uci.ics.asterix.transaction.management.service.transaction.JobId;
 import edu.uci.ics.asterix.transaction.management.service.transaction.JobIdFactory;
-import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionContext;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 
 public class TransactionSimulator {
@@ -63,12 +62,12 @@
         memLSN = LogUtil.getDummyLogicalLogLocator(transactionProvider.getLogManager());
     }
 
-    public TransactionContext beginTransaction() throws ACIDException {
+    public ITransactionContext beginTransaction() throws ACIDException {
         JobId jobId = JobIdFactory.generateJobId();
         return transactionManager.beginTransaction(jobId);
     }
 
-    public void executeTransactionOperation(TransactionContext txnContext, FileResource.CounterOperation operation)
+    public void executeTransactionOperation(ITransactionContext txnContext, FileResource.CounterOperation operation)
             throws ACIDException {
         // lockManager.lock(txnContext, resourceId, 0);
         ILogManager logManager = transactionProvider.getLogManager();
@@ -91,7 +90,7 @@
 
     }
 
-    public void commitTransaction(TransactionContext context) throws ACIDException {
+    public void commitTransaction(ITransactionContext context) throws ACIDException {
         transactionManager.commitTransaction(context, new DatasetId(-1), -1);
     }
 
@@ -116,7 +115,7 @@
         Schedule schedule = new Schedule(numTransactions);
 
         for (int i = 0; i < numTransactions; i++) {
-            TransactionContext context = txnSimulator.beginTransaction();
+            ITransactionContext context = txnSimulator.beginTransaction();
             txnSimulator.executeTransactionOperation(context, schedule.getOperations()[i]);
             if (schedule.getWillCommit()[i]) {
                 txnSimulator.commitTransaction(context);