diff --git a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
index 9c88f75..d3bb3f4 100644
--- a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
+++ b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/InsertPipelineExample.java
@@ -47,7 +47,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
@@ -152,7 +152,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor primaryInsert = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, recDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, primaryFieldPermutation, IndexOperation.INSERT, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, primaryInsert, splitNCs);
 
         // prepare insertion into secondary index
@@ -176,7 +176,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsert = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, recDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, secondaryFieldPermutation, IndexOperation.INSERT, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, secondaryInsert, splitNCs);
 
         // end the insert pipeline at this sink operator
diff --git a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
index 06411ff..e55882a 100644
--- a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
+++ b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexBulkLoadExample.java
@@ -46,7 +46,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will load a primary index from randomly generated data
@@ -152,7 +152,7 @@
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, btreeSplitProvider, typeTraits, comparatorFactories,
-                fieldPermutation, 0.7f, false, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                fieldPermutation, 0.7f, false, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeBulkLoad, splitNCs);
 
         // distribute the records from the datagen via hashing to the bulk load
diff --git a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
index 3b3d1e2..5402adb 100644
--- a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
+++ b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/PrimaryIndexSearchExample.java
@@ -44,7 +44,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will perform an ordered scan on the primary index
@@ -142,7 +142,7 @@
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         BTreeSearchOperatorDescriptor btreeSearchOp = new BTreeSearchOperatorDescriptor(spec, recDesc, storageManager,
                 lcManagerProvider, btreeSplitProvider, typeTraits, comparatorFactories, lowKeyFields, highKeyFields,
-                true, true, dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                true, true, dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeSearchOp, splitNCs);
 
         // have each node print the results of its respective B-Tree
diff --git a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
index cfc7d25..3a4e59f 100644
--- a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
+++ b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexBulkLoadExample.java
@@ -40,7 +40,7 @@
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDiskOrderScanOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will load a secondary index with <key, primary-index key> pairs
@@ -122,7 +122,7 @@
         IIndexDataflowHelperFactory dataflowHelperFactory = new BTreeDataflowHelperFactory();
         TreeIndexDiskOrderScanOperatorDescriptor btreeScanOp = new TreeIndexDiskOrderScanOperatorDescriptor(spec,
                 recDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeScanOp, splitNCs);
 
         // sort the tuples as preparation for bulk load into secondary index
@@ -144,7 +144,7 @@
         IFileSplitProvider btreeSplitProvider = JobHelper.createFileSplitProvider(splitNCs, options.secondaryBTreeName);
         TreeIndexBulkLoadOperatorDescriptor btreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, btreeSplitProvider, secondaryTypeTraits, comparatorFactories,
-                fieldPermutation, 0.7f, false, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                fieldPermutation, 0.7f, false, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, btreeBulkLoad, splitNCs);
 
         // connect the ops
diff --git a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
index 6c8b024..a09ff4f 100644
--- a/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
+++ b/hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/SecondaryIndexSearchExample.java
@@ -44,7 +44,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 // This example will perform range search on the secondary index
@@ -169,7 +169,7 @@
         BTreeSearchOperatorDescriptor secondarySearchOp = new BTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 searchComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, secondarySearchOp, splitNCs);
 
         // secondary index will output tuples with [UTF8String, Integer]
@@ -185,7 +185,7 @@
         BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 primaryLowKeyFields, primaryHighKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         JobHelper.createPartitionConstraint(spec, primarySearchOp, splitNCs);
 
         // have each node print the results of its respective B-Tree
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java
index f161260..739f107 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/AbstractBTreeOperatorTest.java
@@ -47,11 +47,11 @@
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDropOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexDropOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.TransientLocalResourceFactoryProvider;
@@ -137,7 +137,7 @@
         TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
         TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
                 lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, localResourceFactoryProvider);
+                dataflowHelperFactory, localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
         spec.addRoot(primaryCreateOp);
         runTest(spec);
@@ -172,7 +172,7 @@
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7 };
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                fieldPermutation, 0.7f, true, dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                fieldPermutation, 0.7f, true, dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -188,7 +188,8 @@
         TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
         TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, dataflowHelperFactory, localResourceFactoryProvider);
+                secondaryComparatorFactories, dataflowHelperFactory, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
         spec.addRoot(secondaryCreateOp);
         runTest(spec);
@@ -220,14 +221,13 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         // sort based on secondary keys
         ExternalSortOperatorDescriptor sorter = new ExternalSortOperatorDescriptor(spec, 1000, new int[] { 3, 0 },
                 new IBinaryComparatorFactory[] { PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY),
-        		PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) },
-                primaryRecDesc);
+                        PointableBinaryComparatorFactory.of(UTF8StringPointable.FACTORY) }, primaryRecDesc);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, sorter, NC1_ID);
 
         // load secondary index
@@ -235,7 +235,7 @@
         TreeIndexBulkLoadOperatorDescriptor secondaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, fieldPermutation, 0.7f, true, dataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
@@ -273,7 +273,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor primaryBtreeInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, ordersDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, primaryFieldPermutation, pipelineOperation, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeInsertOp, NC1_ID);
 
         // first secondary index
@@ -281,7 +281,7 @@
         TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, ordersDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, fieldPermutationB, pipelineOperation, dataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryInsertOp, NC1_ID);
 
         NullSinkOperatorDescriptor nullSink = new NullSinkOperatorDescriptor(spec);
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java
index a43e5d8..f1c6877 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexScanOperatorTest.java
@@ -35,7 +35,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreePrimaryIndexScanOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -72,7 +72,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java
index 9c73cd3..1a793fa 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexSearchOperatorTest.java
@@ -35,7 +35,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreePrimaryIndexSearchOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -77,7 +77,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java
index 2c469cc..ef93a13 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreePrimaryIndexStatsOperatorTest.java
@@ -28,7 +28,7 @@
 import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreePrimaryIndexStatsOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -45,7 +45,7 @@
 
         TreeIndexStatsOperatorDescriptor primaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
                 lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                dataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryStatsOp, NC1_ID);
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
                 createTempFile().getAbsolutePath()) });
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java
index ac0d980..33bd22e 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexInsertOperatorTest.java
@@ -35,7 +35,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreeSecondaryIndexInsertOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -81,7 +81,7 @@
         BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
                 secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
 
         // second field from the tuples coming from secondary index
@@ -93,7 +93,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 primaryLowKeyFields, primaryHighKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java
index b140b25..999789a 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexSearchOperatorTest.java
@@ -35,7 +35,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreeSecondaryIndexSearchOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -80,7 +80,7 @@
         BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
                 secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
 
         int[] primaryLowKeyFields = { 1 }; // second field from the tuples
@@ -92,7 +92,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 primaryLowKeyFields, primaryHighKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java
index e9e8c56..ebb5496 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/btree/BTreeSecondaryIndexUpsertOperatorTest.java
@@ -20,7 +20,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 
 public class BTreeSecondaryIndexUpsertOperatorTest extends AbstractBTreeOperatorTest {
 
@@ -66,7 +66,7 @@
         BTreeSearchOperatorDescriptor secondaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec,
                 secondaryRecDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, secondaryLowKeyFields, secondaryHighKeyFields, true, true,
-                dataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                dataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBtreeSearchOp, NC1_ID);
 
         // second field from the tuples coming from secondary index
@@ -78,7 +78,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 primaryLowKeyFields, primaryHighKeyFields, true, true, dataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java
index 6bc13da..0ecbd15 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/invertedindex/WordInvertedIndexTest.java
@@ -56,7 +56,7 @@
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ConstantMergePolicyProvider;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.FlushControllerProvider;
 import edu.uci.ics.hyracks.storage.am.lsm.common.impls.ImmediateSchedulerProvider;
@@ -159,7 +159,7 @@
         TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
         TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
                 lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                btreeDataflowHelperFactory, localResourceFactoryProvider);
+                btreeDataflowHelperFactory, localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
         spec.addRoot(primaryCreateOp);
         runTest(spec);
@@ -171,7 +171,7 @@
         LSMInvertedIndexCreateOperatorDescriptor invIndexCreateOp = new LSMInvertedIndexCreateOperatorDescriptor(spec,
                 storageManager, btreeFileSplitProvider, lcManagerProvider, tokenTypeTraits, tokenComparatorFactories,
                 invListsTypeTraits, invListsComparatorFactories, tokenizerFactory, invertedIndexDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE, localResourceFactoryProvider);
+                localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexCreateOp, NC1_ID);
         spec.addRoot(invIndexCreateOp);
         runTest(spec);
@@ -203,7 +203,7 @@
         TreeIndexBulkLoadOperatorDescriptor primaryBtreeBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, fieldPermutation, 0.7f, true, btreeDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeBulkLoad, NC1_ID);
         return primaryBtreeBulkLoad;
     }
@@ -230,7 +230,7 @@
         BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primaryFileSplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);
         return primaryBtreeSearchOp;
     }
@@ -279,7 +279,7 @@
         LSMInvertedIndexBulkLoadOperatorDescriptor invIndexBulkLoadOp = new LSMInvertedIndexBulkLoadOperatorDescriptor(
                 spec, fieldPermutation, true, storageManager, btreeFileSplitProvider, lcManagerProvider,
                 tokenTypeTraits, tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
-                tokenizerFactory, invertedIndexDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                tokenizerFactory, invertedIndexDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexBulkLoadOp, NC1_ID);
         return invIndexBulkLoadOp;
     }
@@ -325,7 +325,7 @@
                 0, storageManager, btreeFileSplitProvider, lcManagerProvider, tokenTypeTraits,
                 tokenComparatorFactories, invListsTypeTraits, invListsComparatorFactories,
                 invertedIndexDataflowHelperFactory, tokenizerFactory, searchModifierFactory, invListsRecDesc, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, invIndexSearchOp, NC1_ID);
         return invIndexSearchOp;
     }
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java
index bce4a1d..428b354 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/AbstractRTreeOperatorTest.java
@@ -58,7 +58,7 @@
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexBulkLoadOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexCreateOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.lsm.rtree.utils.LSMRTreeUtils;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
@@ -184,7 +184,7 @@
         TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
         TreeIndexCreateOperatorDescriptor primaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec, storageManager,
                 lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                btreeDataflowHelperFactory, localResourceFactoryProvider);
+                btreeDataflowHelperFactory, localResourceFactoryProvider, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryCreateOp, NC1_ID);
         spec.addRoot(primaryCreateOp);
         runTest(spec);
@@ -223,7 +223,7 @@
         int[] fieldPermutation = { 0, 1, 2, 4, 5, 7, 9, 10, 11, 12 };
         TreeIndexBulkLoadOperatorDescriptor primaryBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
-                fieldPermutation, 0.7f, false, btreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                fieldPermutation, 0.7f, false, btreeDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), ordScanner, 0, sorter, 0);
@@ -239,7 +239,8 @@
         TransientLocalResourceFactoryProvider localResourceFactoryProvider = new TransientLocalResourceFactoryProvider();
         TreeIndexCreateOperatorDescriptor secondaryCreateOp = new TreeIndexCreateOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, rtreeDataflowHelperFactory, localResourceFactoryProvider);
+                secondaryComparatorFactories, rtreeDataflowHelperFactory, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryCreateOp, NC1_ID);
         spec.addRoot(secondaryCreateOp);
         runTest(spec);
@@ -271,7 +272,7 @@
         BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                 lowKeyFields, highKeyFields, true, true, btreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
 
         // load secondary index
@@ -279,7 +280,7 @@
         TreeIndexBulkLoadOperatorDescriptor secondaryBulkLoad = new TreeIndexBulkLoadOperatorDescriptor(spec,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, fieldPermutation, 0.7f, false, rtreeDataflowHelperFactory,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryBulkLoad, NC1_ID);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primarySearchOp, 0);
@@ -319,16 +320,16 @@
         int[] primaryFieldPermutation = { 0, 1, 2, 4, 5, 7, 9, 10, 11, 12 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor primaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, ordersDesc, storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
-                primaryComparatorFactories, primaryFieldPermutation, IndexOperation.INSERT, btreeDataflowHelperFactory, null,
-                NoOpOperationCallbackProvider.INSTANCE);
+                primaryComparatorFactories, primaryFieldPermutation, IndexOperation.INSERT, btreeDataflowHelperFactory,
+                null, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryInsertOp, NC1_ID);
 
         // secondary index
         int[] secondaryFieldPermutation = { 9, 10, 11, 12, 0 };
         TreeIndexInsertUpdateDeleteOperatorDescriptor secondaryInsertOp = new TreeIndexInsertUpdateDeleteOperatorDescriptor(
                 spec, ordersDesc, storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
-                secondaryComparatorFactories, secondaryFieldPermutation, IndexOperation.INSERT, rtreeDataflowHelperFactory,
-                null, NoOpOperationCallbackProvider.INSTANCE);
+                secondaryComparatorFactories, secondaryFieldPermutation, IndexOperation.INSERT,
+                rtreeDataflowHelperFactory, null, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryInsertOp, NC1_ID);
 
         NullSinkOperatorDescriptor nullSink = new NullSinkOperatorDescriptor(spec);
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java
index d01d701..417b074 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexInsertOperatorTest.java
@@ -39,7 +39,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
@@ -87,7 +87,7 @@
         RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
 
         // fifth field from the tuples coming from secondary index
@@ -99,7 +99,7 @@
         BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, primaryLowKeyFields, primaryHighKeyFields, true, true,
-                btreeDataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                btreeDataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java
index c727700..90bb918 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexScanOperatorTest.java
@@ -37,7 +37,7 @@
 import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
@@ -84,7 +84,7 @@
         RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java
index 53ec214..8356c4d 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexSearchOperatorTest.java
@@ -39,7 +39,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.TreeIndexException;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.dataflow.RTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
@@ -86,7 +86,7 @@
         RTreeSearchOperatorDescriptor secondarySearchOp = new RTreeSearchOperatorDescriptor(spec, secondaryRecDesc,
                 storageManager, lcManagerProvider, secondarySplitProvider, secondaryTypeTraits,
                 secondaryComparatorFactories, keyFields, rtreeDataflowHelperFactory, false,
-                NoOpOperationCallbackProvider.INSTANCE);
+                NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondarySearchOp, NC1_ID);
 
         // fifth field from the tuples coming from secondary index
@@ -98,7 +98,7 @@
         BTreeSearchOperatorDescriptor primarySearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                 storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits,
                 primaryComparatorFactories, primaryLowKeyFields, primaryHighKeyFields, true, true,
-                btreeDataflowHelperFactory, false, NoOpOperationCallbackProvider.INSTANCE);
+                btreeDataflowHelperFactory, false, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primarySearchOp, NC1_ID);
 
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java
index 59ecf06..cdc09be 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/am/rtree/RTreeSecondaryIndexStatsOperatorTest.java
@@ -31,7 +31,7 @@
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexStatsOperatorDescriptor;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 public class RTreeSecondaryIndexStatsOperatorTest extends AbstractRTreeOperatorTest {
@@ -51,7 +51,7 @@
 
         TreeIndexStatsOperatorDescriptor secondaryStatsOp = new TreeIndexStatsOperatorDescriptor(spec, storageManager,
                 lcManagerProvider, secondarySplitProvider, secondaryTypeTraits, secondaryComparatorFactories,
-                rtreeDataflowHelperFactory, NoOpOperationCallbackProvider.INSTANCE);
+                rtreeDataflowHelperFactory, NoOpOperationCallbackFactory.INSTANCE);
         PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, secondaryStatsOp, NC1_ID);
         IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
                 createTempFile().getAbsolutePath()) });
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
index 83570c8..26ea6f61 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeSearchOperatorDescriptor.java
@@ -24,9 +24,10 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -44,10 +45,11 @@
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory dataflowHelperFactory,
-            boolean retainInput, IOperationCallbackFactory opCallbackProvider) {
+            boolean retainInput, ISearchOperationCallbackFactory searchOpCallbackProvider) {
         super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, retainInput, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                comparatorFactories, dataflowHelperFactory, null, retainInput,
+                NoOpLocalResourceFactoryProvider.INSTANCE, searchOpCallbackProvider,
+                NoOpOperationCallbackFactory.INSTANCE);
         this.lowKeyFields = lowKeyFields;
         this.highKeyFields = highKeyFields;
         this.lowKeyInclusive = lowKeyInclusive;
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
index 8a259ef..2901fce 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeUpdateSearchOperatorDescriptor.java
@@ -24,7 +24,7 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleUpdaterFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
@@ -40,10 +40,11 @@
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] lowKeyFields, int[] highKeyFields,
             boolean lowKeyInclusive, boolean highKeyInclusive, IIndexDataflowHelperFactory dataflowHelperFactory,
-            boolean retainInput, IOperationCallbackFactory opCallbackProvider, ITupleUpdaterFactory tupleUpdaterFactory) {
+            boolean retainInput, ISearchOperationCallbackFactory searchOpCallbackProvider,
+            ITupleUpdaterFactory tupleUpdaterFactory) {
         super(spec, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
                 comparatorFactories, lowKeyFields, highKeyFields, lowKeyInclusive, highKeyInclusive,
-                dataflowHelperFactory, retainInput, opCallbackProvider);
+                dataflowHelperFactory, retainInput, searchOpCallbackProvider);
         this.tupleUpdaterFactory = tupleUpdaterFactory;
     }
 
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackFactory.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackFactory.java
deleted file mode 100644
index 6ed056d..0000000
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackFactory.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-import java.io.Serializable;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-
-public interface IOperationCallbackFactory extends Serializable {
-    public IModificationOperationCallback createModificationOperationCallback(long resourceId, IHyracksTaskContext ctx) throws HyracksDataException;
-
-    public ISearchOperationCallback createSearchOperationCallback(long resourceId, IHyracksTaskContext ctx) throws HyracksDataException;
-}
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java
deleted file mode 100644
index f579af5..0000000
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/api/IOperationCallbackProvider.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.common.api;
-
-import java.io.Serializable;
-
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-
-public interface IOperationCallbackProvider extends Serializable {
-    public IModificationOperationCallback getModificationOperationCallback(long resourceId, IHyracksTaskContext ctx);
-
-    public ISearchOperationCallback getSearchOperationCallback(long resourceId, IHyracksTaskContext ctx);
-}
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java
index 3a493c0..c26bbfa 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractIndexOperatorDescriptor.java
@@ -20,7 +20,8 @@
 import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
@@ -36,15 +37,17 @@
     protected final IIndexDataflowHelperFactory dataflowHelperFactory;
     protected final ITupleFilterFactory tupleFilterFactory;
     protected final boolean retainInput;
-    protected final IOperationCallbackFactory opCallbackProvider;
+    protected final ISearchOperationCallbackFactory searchOpCallbackFactory;
+    protected final IModificationOperationCallbackFactory modificationOpCallbackFactory;
     protected final ILocalResourceFactoryProvider localResourceFactoryProvider;
 
     public AbstractIndexOperatorDescriptor(IOperatorDescriptorRegistry spec, int inputArity, int outputArity,
             RecordDescriptor recDesc, IStorageManagerInterface storageManager,
             IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
             IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory,
-            boolean retainInput, IOperationCallbackFactory opCallbackProvider,
-            ILocalResourceFactoryProvider localResourceFactoryProvider) {
+            boolean retainInput, ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, inputArity, outputArity);
         this.fileSplitProvider = fileSplitProvider;
         this.storageManager = storageManager;
@@ -52,8 +55,9 @@
         this.dataflowHelperFactory = dataflowHelperFactory;
         this.retainInput = retainInput;
         this.tupleFilterFactory = tupleFilterFactory;
-        this.opCallbackProvider = opCallbackProvider;
         this.localResourceFactoryProvider = localResourceFactoryProvider;
+        this.searchOpCallbackFactory = searchOpCallbackFactory;
+        this.modificationOpCallbackFactory = modificationOpCallbackFactory;
         if (outputArity > 0) {
             recordDescriptors[0] = recDesc;
         }
@@ -90,8 +94,13 @@
     }
 
     @Override
-    public IOperationCallbackFactory getOpCallbackProvider() {
-        return opCallbackProvider;
+    public ISearchOperationCallbackFactory getSearchOpCallbackFactory() {
+        return searchOpCallbackFactory;
+    }
+    
+    @Override
+    public IModificationOperationCallbackFactory getModificationOpCallbackFactory() {
+        return modificationOpCallbackFactory;
     }
 
     @Override
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
index 382fb0d..1a5885e 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/AbstractTreeIndexOperatorDescriptor.java
@@ -21,7 +21,8 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
@@ -38,11 +39,12 @@
             IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories,
             IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory,
-            boolean retainInput, IOperationCallbackFactory opCallbackProvider,
-            ILocalResourceFactoryProvider localResourceFactoryProvider) {
+            boolean retainInput, ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, inputArity, outputArity, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider,
-                dataflowHelperFactory, tupleFilterFactory, retainInput, opCallbackProvider,
-                localResourceFactoryProvider);
+                dataflowHelperFactory, tupleFilterFactory, retainInput, localResourceFactoryProvider,
+                searchOpCallbackFactory, modificationOpCallbackFactory);
         this.typeTraits = typeTraits;
         this.comparatorFactories = comparatorFactories;
     }
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
index e5d45d9..6193414 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IIndexOperatorDescriptor.java
@@ -19,7 +19,8 @@
 import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
@@ -37,7 +38,9 @@
 
     public boolean getRetainInput();
 
-    public IOperationCallbackFactory getOpCallbackProvider();
+    public ISearchOperationCallbackFactory getSearchOpCallbackFactory();
+    
+    public IModificationOperationCallbackFactory getModificationOpCallbackFactory();
     
     public ITupleFilterFactory getTupleFilterFactory();
     
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java
index 8a0f729..d9b25d7 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexDropOperatorDescriptor.java
@@ -24,7 +24,7 @@
 import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -41,8 +41,8 @@
         // This should eventually not be *hacked*, but I don't know the proper fix yet. -zheilbron
         super(spec, 0, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, new ITypeTraits[] {
                 IntegerPointable.TYPE_TRAITS, IntegerPointable.TYPE_TRAITS }, new IBinaryComparatorFactory[] { null },
-                dataflowHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, NoOpOperationCallbackFactory.INSTANCE);
     }
 
     @Override
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java
index 7060f1f..4480c26 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexInsertUpdateDeleteOperatorNodePushable.java
@@ -67,8 +67,8 @@
         indexHelper.open();
         IIndex index = indexHelper.getIndexInstance();
         try {
-            modCallback = opDesc.getOpCallbackProvider().createModificationOperationCallback(indexHelper.getResourceID(),
-                    ctx);
+            modCallback = opDesc.getModificationOpCallbackFactory().createModificationOperationCallback(
+                    indexHelper.getResourceID(), ctx);
             indexAccessor = index.createAccessor(modCallback, NoOpOperationCallback.INSTANCE);
             ITupleFilterFactory tupleFilterFactory = opDesc.getTupleFilterFactory();
             if (tupleFilterFactory != null) {
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java
index 2721a0a..98beea2 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/IndexSearchOperatorNodePushable.java
@@ -86,8 +86,8 @@
             dos = tb.getDataOutput();
             appender = new FrameTupleAppender(ctx.getFrameSize());
             appender.reset(writeBuffer, true);
-            ISearchOperationCallback searchCallback = opDesc.getOpCallbackProvider().createSearchOperationCallback(
-                    indexHelper.getResourceID(), ctx);
+            ISearchOperationCallback searchCallback = opDesc.getSearchOpCallbackFactory()
+                    .createSearchOperationCallback(indexHelper.getResourceID(), ctx);
             indexAccessor = index.createAccessor(NoOpOperationCallback.INSTANCE, searchCallback);
             cursor = createCursor();
             if (retainInput) {
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
index d3e61e0..fea6463 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexBulkLoadOperatorDescriptor.java
@@ -23,7 +23,8 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -40,10 +41,10 @@
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation, float fillFactor,
             boolean verifyInput, IIndexDataflowHelperFactory dataflowHelperFactory,
-            IOperationCallbackFactory opCallbackProvider) {
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 1, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                comparatorFactories, dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
         this.fieldPermutation = fieldPermutation;
         this.fillFactor = fillFactor;
         this.verifyInput = verifyInput;
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
index 8ba5fae..2207295 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexCreateOperatorDescriptor.java
@@ -23,7 +23,8 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackProvider;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
 
@@ -35,10 +36,11 @@
             IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories,
             IIndexDataflowHelperFactory dataflowHelperFactory,
-            ILocalResourceFactoryProvider localResourceFactoryProvider) {
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 0, 0, null, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, NoOpOperationCallbackProvider.INSTANCE,
-                localResourceFactoryProvider);
+                comparatorFactories, dataflowHelperFactory, null, false, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
     }
 
     @Override
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
index b33465c..1adbc5f 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorDescriptor.java
@@ -23,7 +23,8 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -34,9 +35,10 @@
     public TreeIndexDiskOrderScanOperatorDescriptor(IOperatorDescriptorRegistry spec, RecordDescriptor recDesc,
             IStorageManagerInterface storageManager, IIndexLifecycleManagerProvider lifecycleManagerProvider,
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
-            IIndexDataflowHelperFactory dataflowHelperFactory, IOperationCallbackFactory opCallbackProvider) {
+            IIndexDataflowHelperFactory dataflowHelperFactory, ISearchOperationCallbackFactory searchOpCallbackProvider) {
         super(spec, 0, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits, null,
-                dataflowHelperFactory, null, false, opCallbackProvider, NoOpLocalResourceFactoryProvider.INSTANCE);
+                dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackProvider, NoOpOperationCallbackFactory.INSTANCE);
     }
 
     @Override
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
index ba747e6..a861af7 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexDiskOrderScanOperatorNodePushable.java
@@ -52,7 +52,7 @@
         try {
             ITreeIndexFrame cursorFrame = treeIndex.getLeafFrameFactory().createFrame();
             ITreeIndexCursor cursor = treeIndexHelper.createDiskOrderScanCursor(cursorFrame);
-            ISearchOperationCallback searchCallback = opDesc.getOpCallbackProvider().createSearchOperationCallback(
+            ISearchOperationCallback searchCallback = opDesc.getSearchOpCallbackFactory().createSearchOperationCallback(
                     treeIndexHelper.getResourceID(), ctx);
             ITreeIndexAccessor indexAccessor = (ITreeIndexAccessor) treeIndex.createAccessor(
                     NoOpOperationCallback.INSTANCE, searchCallback);
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
index cc14eeb..0326b2e 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexInsertUpdateDeleteOperatorDescriptor.java
@@ -24,8 +24,9 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
@@ -42,10 +43,11 @@
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] fieldPermutation, IndexOperation op,
             IIndexDataflowHelperFactory dataflowHelperFactory, ITupleFilterFactory tupleFilterFactory,
-            IOperationCallbackFactory opCallbackProvider) {
+            IModificationOperationCallbackFactory modificationOpCallbackProvider) {
         super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, tupleFilterFactory, false, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                comparatorFactories, dataflowHelperFactory, tupleFilterFactory, false,
+                NoOpLocalResourceFactoryProvider.INSTANCE, NoOpOperationCallbackFactory.INSTANCE,
+                modificationOpCallbackProvider);
         this.fieldPermutation = fieldPermutation;
         this.op = op;
     }
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
index e0f0071..6e19ecb 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexStatsOperatorDescriptor.java
@@ -25,7 +25,8 @@
 import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -38,10 +39,10 @@
     public TreeIndexStatsOperatorDescriptor(IOperatorDescriptorRegistry spec, IStorageManagerInterface storageManager,
             IIndexLifecycleManagerProvider lifecycleManagerProvider, IFileSplitProvider fileSplitProvider,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] comparatorFactories,
-            IIndexDataflowHelperFactory dataflowHelperFactory, IOperationCallbackFactory opCallbackProvider) {
+            IIndexDataflowHelperFactory dataflowHelperFactory, ISearchOperationCallbackFactory searchOpCallbackProvider) {
         super(spec, 0, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                comparatorFactories, dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackProvider, NoOpOperationCallbackFactory.INSTANCE);
     }
 
     @Override
diff --git a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java
similarity index 63%
rename from hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java
rename to hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java
index 8d78080..ca77093 100644
--- a/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackProvider.java
+++ b/hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/impls/NoOpOperationCallbackFactory.java
@@ -2,16 +2,16 @@
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallback;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallback;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 
 /**
- * Dummy NoOp callback provider used primarily for testing. Always returns the 
- * {@link NoOpOperationCallback} instance. 
- *
+ * Dummy NoOp callback factory used primarily for testing. Always returns the {@link NoOpOperationCallback} instance.
  * Implemented as an enum to preserve singleton model while being serializable
  */
-public enum NoOpOperationCallbackProvider implements IOperationCallbackFactory {
+public enum NoOpOperationCallbackFactory implements ISearchOperationCallbackFactory,
+        IModificationOperationCallbackFactory {
     INSTANCE;
 
     @Override
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java
index 18e8485..e0af36e 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/AbstractLSMInvertedIndexOperatorDescriptor.java
@@ -21,7 +21,8 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ITupleFilterFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
@@ -47,11 +48,13 @@
             ITypeTraits[] tokenTypeTraits, IBinaryComparatorFactory[] tokenComparatorFactories,
             ITypeTraits[] invListsTypeTraits, IBinaryComparatorFactory[] invListComparatorFactories,
             IBinaryTokenizerFactory tokenizerFactory, IIndexDataflowHelperFactory dataflowHelperFactory,
-            ITupleFilterFactory tupleFilterFactory, boolean retainInput, IOperationCallbackFactory opCallbackProvider,
-            ILocalResourceFactoryProvider localResourceFactoryProvider) {
+            ITupleFilterFactory tupleFilterFactory, boolean retainInput,
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            ISearchOperationCallbackFactory searchOpCallbackFactory,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, inputArity, outputArity, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider,
-                dataflowHelperFactory, tupleFilterFactory, retainInput, opCallbackProvider,
-                localResourceFactoryProvider);
+                dataflowHelperFactory, tupleFilterFactory, retainInput, localResourceFactoryProvider,
+                searchOpCallbackFactory, modificationOpCallbackFactory);
         this.invListsTypeTraits = invListsTypeTraits;
         this.invListComparatorFactories = invListComparatorFactories;
         this.tokenTypeTraits = tokenTypeTraits;
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java
index 11d7d25..6b07608 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexBulkLoadOperatorDescriptor.java
@@ -23,9 +23,10 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexBulkLoadOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
@@ -43,11 +44,11 @@
             IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
             IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
             IIndexDataflowHelperFactory invertedIndexDataflowHelperFactory,
-            IOperationCallbackFactory opCallbackProvider) {
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 1, 0, null, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
                 tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
-                invertedIndexDataflowHelperFactory, null, false, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                invertedIndexDataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
         this.fieldPermutation = fieldPermutation;
         this.verifyInput = verifyInput;
     }
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java
index 1e6f32f..641878f 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexCreateOperatorDescriptor.java
@@ -23,9 +23,10 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexCreateOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.ILocalResourceFactoryProvider;
@@ -39,11 +40,13 @@
             IIndexLifecycleManagerProvider lifecycleManagerProvider, ITypeTraits[] tokenTypeTraits,
             IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
             IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
-            IIndexDataflowHelperFactory btreeDataflowHelperFactory, IOperationCallbackFactory opCallbackProvider,
-            ILocalResourceFactoryProvider localResourceFactoryProvider) {
+            IIndexDataflowHelperFactory btreeDataflowHelperFactory,
+            ILocalResourceFactoryProvider localResourceFactoryProvider,
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 0, 0, null, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
                 tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
-                btreeDataflowHelperFactory, null, false, opCallbackProvider, localResourceFactoryProvider);
+                btreeDataflowHelperFactory, null, false, localResourceFactoryProvider,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
     }
 
     @Override
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java
index 650dd556..4b455e7 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexInsertUpdateDeleteOperator.java
@@ -23,9 +23,10 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.IModificationOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexInsertUpdateDeleteOperatorNodePushable;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
@@ -44,10 +45,11 @@
             IBinaryComparatorFactory[] tokenComparatorFactories, ITypeTraits[] invListsTypeTraits,
             IBinaryComparatorFactory[] invListComparatorFactories, IBinaryTokenizerFactory tokenizerFactory,
             int[] fieldPermutation, IndexOperation op, IIndexDataflowHelperFactory dataflowHelperFactory,
-            IOperationCallbackFactory opCallbackProvider) {
+            IModificationOperationCallbackFactory modificationOpCallbackFactory) {
         super(spec, 0, 0, null, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
                 tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, tokenizerFactory,
-                dataflowHelperFactory, null, false, opCallbackProvider, NoOpLocalResourceFactoryProvider.INSTANCE);
+                dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                NoOpOperationCallbackFactory.INSTANCE, modificationOpCallbackFactory);
         this.fieldPermutation = fieldPermutation;
         this.op = op;
     }
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java
index 4b2935f..4f97060 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/dataflow/LSMInvertedIndexSearchOperatorDescriptor.java
@@ -25,8 +25,9 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifierFactory;
 import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizerFactory;
@@ -46,11 +47,11 @@
             IBinaryComparatorFactory[] invListComparatorFactories,
             IIndexDataflowHelperFactory btreeDataflowHelperFactory, IBinaryTokenizerFactory queryTokenizerFactory,
             IInvertedIndexSearchModifierFactory searchModifierFactory, RecordDescriptor recDesc, boolean retainInput,
-            IOperationCallbackFactory opCallbackProvider) {
+            ISearchOperationCallbackFactory searchOpCallbackProvider) {
         super(spec, 1, 1, recDesc, storageManager, fileSplitProvider, lifecycleManagerProvider, tokenTypeTraits,
                 tokenComparatorFactories, invListsTypeTraits, invListComparatorFactories, queryTokenizerFactory,
-                btreeDataflowHelperFactory, null, retainInput, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                btreeDataflowHelperFactory, null, retainInput, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackProvider, NoOpOperationCallbackFactory.INSTANCE);
         this.queryField = queryField;
         this.searchModifierFactory = searchModifierFactory;
     }
diff --git a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java
index 14f5c23..419d5aa 100644
--- a/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java
+++ b/hyracks-storage-am-lsm-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/invertedindex/search/TOccurrenceSearcher.java
@@ -282,6 +282,8 @@
         boolean advancePrevResult = false;
         int resultTidx = 0;
 
+        currentNumResults = 0;
+        
         resultFrameTupleAcc.reset(prevCurrentBuffer);
         resultFrameTupleApp.reset(newCurrentBuffer, true);
 
diff --git a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
index 9426ca7..0331f52 100644
--- a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
+++ b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorDescriptor.java
@@ -24,9 +24,10 @@
 import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManagerProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
+import edu.uci.ics.hyracks.storage.am.common.api.ISearchOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
+import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 import edu.uci.ics.hyracks.storage.common.file.NoOpLocalResourceFactoryProvider;
 
@@ -41,17 +42,16 @@
             IFileSplitProvider fileSplitProvider, ITypeTraits[] typeTraits,
             IBinaryComparatorFactory[] comparatorFactories, int[] keyFields,
             IIndexDataflowHelperFactory dataflowHelperFactory, boolean retainInput,
-            IOperationCallbackFactory opCallbackProvider) {
+            ISearchOperationCallbackFactory searchOpCallbackFactory) {
         super(spec, 1, 1, recDesc, storageManager, lifecycleManagerProvider, fileSplitProvider, typeTraits,
-                comparatorFactories, dataflowHelperFactory, null, false, opCallbackProvider,
-                NoOpLocalResourceFactoryProvider.INSTANCE);
+                comparatorFactories, dataflowHelperFactory, null, false, NoOpLocalResourceFactoryProvider.INSTANCE,
+                searchOpCallbackFactory, NoOpOperationCallbackFactory.INSTANCE);
         this.keyFields = keyFields;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) {
-        return new RTreeSearchOperatorNodePushable(this, ctx, opCallbackProvider, partition, recordDescProvider,
-                keyFields);
+        return new RTreeSearchOperatorNodePushable(this, ctx, partition, recordDescProvider, keyFields);
     }
 }
\ No newline at end of file
diff --git a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
index 9d41491..de4961b 100644
--- a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
+++ b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeSearchOperatorNodePushable.java
@@ -17,7 +17,6 @@
 
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
-import edu.uci.ics.hyracks.storage.am.common.api.IOperationCallbackFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.AbstractTreeIndexOperatorDescriptor;
@@ -32,8 +31,7 @@
     protected MultiComparator cmp;
 
     public RTreeSearchOperatorNodePushable(AbstractTreeIndexOperatorDescriptor opDesc, IHyracksTaskContext ctx,
-            IOperationCallbackFactory opCallbackProvider, int partition, IRecordDescriptorProvider recordDescProvider,
-            int[] keyFields) {
+            int partition, IRecordDescriptorProvider recordDescProvider, int[] keyFields) {
         super(opDesc, ctx, partition, recordDescProvider);
         if (keyFields != null && keyFields.length > 0) {
             searchKey = new PermutingFrameTupleReference();