Add support for storing result status for a job in the dataset directory record.

git-svn-id: https://hyracks.googlecode.com/svn/branches/fullstack_hyracks_result_distribution@2840 123451ca-8445-de46-9d55-352943316053
diff --git a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java
index 1aa0c86..6316bba 100644
--- a/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java
+++ b/hyracks/hyracks-api/src/main/java/edu/uci/ics/hyracks/api/dataset/DatasetDirectoryRecord.java
@@ -19,15 +19,25 @@
 import edu.uci.ics.hyracks.api.comm.NetworkAddress;
 
 public class DatasetDirectoryRecord implements Serializable {
+    public enum Status {
+        IDLE,
+        RUNNING,
+        SUCCESS,
+        FAILED
+    }
+
     private static final long serialVersionUID = 1L;
 
     private NetworkAddress address;
 
-    private boolean eos;
+    private boolean readEOS;
+
+    private Status status;
 
     public DatasetDirectoryRecord() {
         this.address = null;
-        this.eos = false;
+        this.readEOS = false;
+        this.status = Status.IDLE;
     }
 
     public void setNetworkAddress(NetworkAddress address) {
@@ -38,12 +48,28 @@
         return address;
     }
 
-    public void setEOS(boolean eos) {
-        this.eos = eos;
+    public void readEOS() {
+        this.readEOS = true;
     }
 
-    public boolean getEOS() {
-        return eos;
+    public boolean hasReachedReadEOS() {
+        return readEOS;
+    }
+
+    public void start() {
+        status = Status.RUNNING;
+    }
+
+    public void writeEOS() {
+        status = Status.SUCCESS;
+    }
+
+    public void fail() {
+        status = Status.FAILED;
+    }
+
+    public Status getStatus() {
+        return status;
     }
 
     @Override
@@ -56,4 +82,4 @@
         }
         return address.equals(((DatasetDirectoryRecord) o).address);
     }
-}
\ No newline at end of file
+}