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From chath...@apache.org
Subject [2/4] adding initial messaging framework changes
Date Fri, 08 Aug 2014 19:33:59 GMT
http://git-wip-us.apache.org/repos/asf/airavata/blob/1fe3d1d8/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/JobStatusChangeEvent.java
----------------------------------------------------------------------
diff --git a/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/JobStatusChangeEvent.java b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/JobStatusChangeEvent.java
new file mode 100644
index 0000000..3d26458
--- /dev/null
+++ b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/JobStatusChangeEvent.java
@@ -0,0 +1,610 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Autogenerated by Thrift Compiler (0.9.1)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+package org.apache.airavata.model.messaging.event;
+
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.SchemeFactory;
+import org.apache.thrift.scheme.StandardScheme;
+
+import org.apache.thrift.scheme.TupleScheme;
+import org.apache.thrift.protocol.TTupleProtocol;
+import org.apache.thrift.protocol.TProtocolException;
+import org.apache.thrift.EncodingUtils;
+import org.apache.thrift.TException;
+import org.apache.thrift.async.AsyncMethodCallback;
+import org.apache.thrift.server.AbstractNonblockingServer.*;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.EnumMap;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.EnumSet;
+import java.util.Collections;
+import java.util.BitSet;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("all") public class JobStatusChangeEvent implements org.apache.thrift.TBase<JobStatusChangeEvent, JobStatusChangeEvent._Fields>, java.io.Serializable, Cloneable, Comparable<JobStatusChangeEvent> {
+  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("JobStatusChangeEvent");
+
+  private static final org.apache.thrift.protocol.TField STATE_FIELD_DESC = new org.apache.thrift.protocol.TField("state", org.apache.thrift.protocol.TType.I32, (short)1);
+  private static final org.apache.thrift.protocol.TField JOB_IDENTITY_FIELD_DESC = new org.apache.thrift.protocol.TField("jobIdentity", org.apache.thrift.protocol.TType.STRUCT, (short)2);
+  private static final org.apache.thrift.protocol.TField JOB_MONITOR_FIELD_DESC = new org.apache.thrift.protocol.TField("jobMonitor", org.apache.thrift.protocol.TType.STRUCT, (short)3);
+
+  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = new HashMap<Class<? extends IScheme>, SchemeFactory>();
+  static {
+    schemes.put(StandardScheme.class, new JobStatusChangeEventStandardSchemeFactory());
+    schemes.put(TupleScheme.class, new JobStatusChangeEventTupleSchemeFactory());
+  }
+
+  private org.apache.airavata.model.workspace.experiment.JobState state; // required
+  private JobIdentity jobIdentity; // required
+  private JobMonitor jobMonitor; // required
+
+  /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
+  @SuppressWarnings("all") public enum _Fields implements org.apache.thrift.TFieldIdEnum {
+    /**
+     * 
+     * @see org.apache.airavata.model.workspace.experiment.JobState
+     */
+    STATE((short)1, "state"),
+    JOB_IDENTITY((short)2, "jobIdentity"),
+    JOB_MONITOR((short)3, "jobMonitor");
+
+    private static final Map<String, _Fields> byName = new HashMap<String, _Fields>();
+
+    static {
+      for (_Fields field : EnumSet.allOf(_Fields.class)) {
+        byName.put(field.getFieldName(), field);
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, or null if its not found.
+     */
+    public static _Fields findByThriftId(int fieldId) {
+      switch(fieldId) {
+        case 1: // STATE
+          return STATE;
+        case 2: // JOB_IDENTITY
+          return JOB_IDENTITY;
+        case 3: // JOB_MONITOR
+          return JOB_MONITOR;
+        default:
+          return null;
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, throwing an exception
+     * if it is not found.
+     */
+    public static _Fields findByThriftIdOrThrow(int fieldId) {
+      _Fields fields = findByThriftId(fieldId);
+      if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
+      return fields;
+    }
+
+    /**
+     * Find the _Fields constant that matches name, or null if its not found.
+     */
+    public static _Fields findByName(String name) {
+      return byName.get(name);
+    }
+
+    private final short _thriftId;
+    private final String _fieldName;
+
+    _Fields(short thriftId, String fieldName) {
+      _thriftId = thriftId;
+      _fieldName = fieldName;
+    }
+
+    public short getThriftFieldId() {
+      return _thriftId;
+    }
+
+    public String getFieldName() {
+      return _fieldName;
+    }
+  }
+
+  // isset id assignments
+  public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
+  static {
+    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
+    tmpMap.put(_Fields.STATE, new org.apache.thrift.meta_data.FieldMetaData("state", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.EnumMetaData(org.apache.thrift.protocol.TType.ENUM, org.apache.airavata.model.workspace.experiment.JobState.class)));
+    tmpMap.put(_Fields.JOB_IDENTITY, new org.apache.thrift.meta_data.FieldMetaData("jobIdentity", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.StructMetaData(org.apache.thrift.protocol.TType.STRUCT, JobIdentity.class)));
+    tmpMap.put(_Fields.JOB_MONITOR, new org.apache.thrift.meta_data.FieldMetaData("jobMonitor", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.StructMetaData(org.apache.thrift.protocol.TType.STRUCT, JobMonitor.class)));
+    metaDataMap = Collections.unmodifiableMap(tmpMap);
+    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(JobStatusChangeEvent.class, metaDataMap);
+  }
+
+  public JobStatusChangeEvent() {
+  }
+
+  public JobStatusChangeEvent(
+    org.apache.airavata.model.workspace.experiment.JobState state,
+    JobIdentity jobIdentity,
+    JobMonitor jobMonitor)
+  {
+    this();
+    this.state = state;
+    this.jobIdentity = jobIdentity;
+    this.jobMonitor = jobMonitor;
+  }
+
+  /**
+   * Performs a deep copy on <i>other</i>.
+   */
+  public JobStatusChangeEvent(JobStatusChangeEvent other) {
+    if (other.isSetState()) {
+      this.state = other.state;
+    }
+    if (other.isSetJobIdentity()) {
+      this.jobIdentity = new JobIdentity(other.jobIdentity);
+    }
+    if (other.isSetJobMonitor()) {
+      this.jobMonitor = new JobMonitor(other.jobMonitor);
+    }
+  }
+
+  public JobStatusChangeEvent deepCopy() {
+    return new JobStatusChangeEvent(this);
+  }
+
+  @Override
+  public void clear() {
+    this.state = null;
+    this.jobIdentity = null;
+    this.jobMonitor = null;
+  }
+
+  /**
+   * 
+   * @see org.apache.airavata.model.workspace.experiment.JobState
+   */
+  public org.apache.airavata.model.workspace.experiment.JobState getState() {
+    return this.state;
+  }
+
+  /**
+   * 
+   * @see org.apache.airavata.model.workspace.experiment.JobState
+   */
+  public void setState(org.apache.airavata.model.workspace.experiment.JobState state) {
+    this.state = state;
+  }
+
+  public void unsetState() {
+    this.state = null;
+  }
+
+  /** Returns true if field state is set (has been assigned a value) and false otherwise */
+  public boolean isSetState() {
+    return this.state != null;
+  }
+
+  public void setStateIsSet(boolean value) {
+    if (!value) {
+      this.state = null;
+    }
+  }
+
+  public JobIdentity getJobIdentity() {
+    return this.jobIdentity;
+  }
+
+  public void setJobIdentity(JobIdentity jobIdentity) {
+    this.jobIdentity = jobIdentity;
+  }
+
+  public void unsetJobIdentity() {
+    this.jobIdentity = null;
+  }
+
+  /** Returns true if field jobIdentity is set (has been assigned a value) and false otherwise */
+  public boolean isSetJobIdentity() {
+    return this.jobIdentity != null;
+  }
+
+  public void setJobIdentityIsSet(boolean value) {
+    if (!value) {
+      this.jobIdentity = null;
+    }
+  }
+
+  public JobMonitor getJobMonitor() {
+    return this.jobMonitor;
+  }
+
+  public void setJobMonitor(JobMonitor jobMonitor) {
+    this.jobMonitor = jobMonitor;
+  }
+
+  public void unsetJobMonitor() {
+    this.jobMonitor = null;
+  }
+
+  /** Returns true if field jobMonitor is set (has been assigned a value) and false otherwise */
+  public boolean isSetJobMonitor() {
+    return this.jobMonitor != null;
+  }
+
+  public void setJobMonitorIsSet(boolean value) {
+    if (!value) {
+      this.jobMonitor = null;
+    }
+  }
+
+  public void setFieldValue(_Fields field, Object value) {
+    switch (field) {
+    case STATE:
+      if (value == null) {
+        unsetState();
+      } else {
+        setState((org.apache.airavata.model.workspace.experiment.JobState)value);
+      }
+      break;
+
+    case JOB_IDENTITY:
+      if (value == null) {
+        unsetJobIdentity();
+      } else {
+        setJobIdentity((JobIdentity)value);
+      }
+      break;
+
+    case JOB_MONITOR:
+      if (value == null) {
+        unsetJobMonitor();
+      } else {
+        setJobMonitor((JobMonitor)value);
+      }
+      break;
+
+    }
+  }
+
+  public Object getFieldValue(_Fields field) {
+    switch (field) {
+    case STATE:
+      return getState();
+
+    case JOB_IDENTITY:
+      return getJobIdentity();
+
+    case JOB_MONITOR:
+      return getJobMonitor();
+
+    }
+    throw new IllegalStateException();
+  }
+
+  /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
+  public boolean isSet(_Fields field) {
+    if (field == null) {
+      throw new IllegalArgumentException();
+    }
+
+    switch (field) {
+    case STATE:
+      return isSetState();
+    case JOB_IDENTITY:
+      return isSetJobIdentity();
+    case JOB_MONITOR:
+      return isSetJobMonitor();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public boolean equals(Object that) {
+    if (that == null)
+      return false;
+    if (that instanceof JobStatusChangeEvent)
+      return this.equals((JobStatusChangeEvent)that);
+    return false;
+  }
+
+  public boolean equals(JobStatusChangeEvent that) {
+    if (that == null)
+      return false;
+
+    boolean this_present_state = true && this.isSetState();
+    boolean that_present_state = true && that.isSetState();
+    if (this_present_state || that_present_state) {
+      if (!(this_present_state && that_present_state))
+        return false;
+      if (!this.state.equals(that.state))
+        return false;
+    }
+
+    boolean this_present_jobIdentity = true && this.isSetJobIdentity();
+    boolean that_present_jobIdentity = true && that.isSetJobIdentity();
+    if (this_present_jobIdentity || that_present_jobIdentity) {
+      if (!(this_present_jobIdentity && that_present_jobIdentity))
+        return false;
+      if (!this.jobIdentity.equals(that.jobIdentity))
+        return false;
+    }
+
+    boolean this_present_jobMonitor = true && this.isSetJobMonitor();
+    boolean that_present_jobMonitor = true && that.isSetJobMonitor();
+    if (this_present_jobMonitor || that_present_jobMonitor) {
+      if (!(this_present_jobMonitor && that_present_jobMonitor))
+        return false;
+      if (!this.jobMonitor.equals(that.jobMonitor))
+        return false;
+    }
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return 0;
+  }
+
+  @Override
+  public int compareTo(JobStatusChangeEvent other) {
+    if (!getClass().equals(other.getClass())) {
+      return getClass().getName().compareTo(other.getClass().getName());
+    }
+
+    int lastComparison = 0;
+
+    lastComparison = Boolean.valueOf(isSetState()).compareTo(other.isSetState());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetState()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.state, other.state);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetJobIdentity()).compareTo(other.isSetJobIdentity());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetJobIdentity()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.jobIdentity, other.jobIdentity);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetJobMonitor()).compareTo(other.isSetJobMonitor());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetJobMonitor()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.jobMonitor, other.jobMonitor);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    return 0;
+  }
+
+  public _Fields fieldForId(int fieldId) {
+    return _Fields.findByThriftId(fieldId);
+  }
+
+  public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
+    schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
+  }
+
+  public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
+    schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder("JobStatusChangeEvent(");
+    boolean first = true;
+
+    sb.append("state:");
+    if (this.state == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.state);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("jobIdentity:");
+    if (this.jobIdentity == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.jobIdentity);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("jobMonitor:");
+    if (this.jobMonitor == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.jobMonitor);
+    }
+    first = false;
+    sb.append(")");
+    return sb.toString();
+  }
+
+  public void validate() throws org.apache.thrift.TException {
+    // check for required fields
+    if (!isSetState()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'state' is unset! Struct:" + toString());
+    }
+
+    if (!isSetJobIdentity()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'jobIdentity' is unset! Struct:" + toString());
+    }
+
+    if (!isSetJobMonitor()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'jobMonitor' is unset! Struct:" + toString());
+    }
+
+    // check for sub-struct validity
+    if (jobIdentity != null) {
+      jobIdentity.validate();
+    }
+    if (jobMonitor != null) {
+      jobMonitor.validate();
+    }
+  }
+
+  private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
+    try {
+      write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+    try {
+      read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private static class JobStatusChangeEventStandardSchemeFactory implements SchemeFactory {
+    public JobStatusChangeEventStandardScheme getScheme() {
+      return new JobStatusChangeEventStandardScheme();
+    }
+  }
+
+  private static class JobStatusChangeEventStandardScheme extends StandardScheme<JobStatusChangeEvent> {
+
+    public void read(org.apache.thrift.protocol.TProtocol iprot, JobStatusChangeEvent struct) throws org.apache.thrift.TException {
+      org.apache.thrift.protocol.TField schemeField;
+      iprot.readStructBegin();
+      while (true)
+      {
+        schemeField = iprot.readFieldBegin();
+        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
+          break;
+        }
+        switch (schemeField.id) {
+          case 1: // STATE
+            if (schemeField.type == org.apache.thrift.protocol.TType.I32) {
+              struct.state = org.apache.airavata.model.workspace.experiment.JobState.findByValue(iprot.readI32());
+              struct.setStateIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 2: // JOB_IDENTITY
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRUCT) {
+              struct.jobIdentity = new JobIdentity();
+              struct.jobIdentity.read(iprot);
+              struct.setJobIdentityIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 3: // JOB_MONITOR
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRUCT) {
+              struct.jobMonitor = new JobMonitor();
+              struct.jobMonitor.read(iprot);
+              struct.setJobMonitorIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          default:
+            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+        }
+        iprot.readFieldEnd();
+      }
+      iprot.readStructEnd();
+      struct.validate();
+    }
+
+    public void write(org.apache.thrift.protocol.TProtocol oprot, JobStatusChangeEvent struct) throws org.apache.thrift.TException {
+      struct.validate();
+
+      oprot.writeStructBegin(STRUCT_DESC);
+      if (struct.state != null) {
+        oprot.writeFieldBegin(STATE_FIELD_DESC);
+        oprot.writeI32(struct.state.getValue());
+        oprot.writeFieldEnd();
+      }
+      if (struct.jobIdentity != null) {
+        oprot.writeFieldBegin(JOB_IDENTITY_FIELD_DESC);
+        struct.jobIdentity.write(oprot);
+        oprot.writeFieldEnd();
+      }
+      if (struct.jobMonitor != null) {
+        oprot.writeFieldBegin(JOB_MONITOR_FIELD_DESC);
+        struct.jobMonitor.write(oprot);
+        oprot.writeFieldEnd();
+      }
+      oprot.writeFieldStop();
+      oprot.writeStructEnd();
+    }
+
+  }
+
+  private static class JobStatusChangeEventTupleSchemeFactory implements SchemeFactory {
+    public JobStatusChangeEventTupleScheme getScheme() {
+      return new JobStatusChangeEventTupleScheme();
+    }
+  }
+
+  private static class JobStatusChangeEventTupleScheme extends TupleScheme<JobStatusChangeEvent> {
+
+    @Override
+    public void write(org.apache.thrift.protocol.TProtocol prot, JobStatusChangeEvent struct) throws org.apache.thrift.TException {
+      TTupleProtocol oprot = (TTupleProtocol) prot;
+      oprot.writeI32(struct.state.getValue());
+      struct.jobIdentity.write(oprot);
+      struct.jobMonitor.write(oprot);
+    }
+
+    @Override
+    public void read(org.apache.thrift.protocol.TProtocol prot, JobStatusChangeEvent struct) throws org.apache.thrift.TException {
+      TTupleProtocol iprot = (TTupleProtocol) prot;
+      struct.state = org.apache.airavata.model.workspace.experiment.JobState.findByValue(iprot.readI32());
+      struct.setStateIsSet(true);
+      struct.jobIdentity = new JobIdentity();
+      struct.jobIdentity.read(iprot);
+      struct.setJobIdentityIsSet(true);
+      struct.jobMonitor = new JobMonitor();
+      struct.jobMonitor.read(iprot);
+      struct.setJobMonitorIsSet(true);
+    }
+  }
+
+}
+

http://git-wip-us.apache.org/repos/asf/airavata/blob/1fe3d1d8/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskIdentity.java
----------------------------------------------------------------------
diff --git a/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskIdentity.java b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskIdentity.java
new file mode 100644
index 0000000..91cb600
--- /dev/null
+++ b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskIdentity.java
@@ -0,0 +1,588 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Autogenerated by Thrift Compiler (0.9.1)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+package org.apache.airavata.model.messaging.event;
+
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.SchemeFactory;
+import org.apache.thrift.scheme.StandardScheme;
+
+import org.apache.thrift.scheme.TupleScheme;
+import org.apache.thrift.protocol.TTupleProtocol;
+import org.apache.thrift.protocol.TProtocolException;
+import org.apache.thrift.EncodingUtils;
+import org.apache.thrift.TException;
+import org.apache.thrift.async.AsyncMethodCallback;
+import org.apache.thrift.server.AbstractNonblockingServer.*;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.EnumMap;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.EnumSet;
+import java.util.Collections;
+import java.util.BitSet;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("all") public class TaskIdentity implements org.apache.thrift.TBase<TaskIdentity, TaskIdentity._Fields>, java.io.Serializable, Cloneable, Comparable<TaskIdentity> {
+  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("TaskIdentity");
+
+  private static final org.apache.thrift.protocol.TField TASK_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("taskId", org.apache.thrift.protocol.TType.STRING, (short)1);
+  private static final org.apache.thrift.protocol.TField WORKFLOW_NODE_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("workflowNodeId", org.apache.thrift.protocol.TType.STRING, (short)2);
+  private static final org.apache.thrift.protocol.TField EXPERIMENT_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("experimentId", org.apache.thrift.protocol.TType.STRING, (short)3);
+
+  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = new HashMap<Class<? extends IScheme>, SchemeFactory>();
+  static {
+    schemes.put(StandardScheme.class, new TaskIdentityStandardSchemeFactory());
+    schemes.put(TupleScheme.class, new TaskIdentityTupleSchemeFactory());
+  }
+
+  private String taskId; // required
+  private String workflowNodeId; // required
+  private String experimentId; // required
+
+  /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
+  @SuppressWarnings("all") public enum _Fields implements org.apache.thrift.TFieldIdEnum {
+    TASK_ID((short)1, "taskId"),
+    WORKFLOW_NODE_ID((short)2, "workflowNodeId"),
+    EXPERIMENT_ID((short)3, "experimentId");
+
+    private static final Map<String, _Fields> byName = new HashMap<String, _Fields>();
+
+    static {
+      for (_Fields field : EnumSet.allOf(_Fields.class)) {
+        byName.put(field.getFieldName(), field);
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, or null if its not found.
+     */
+    public static _Fields findByThriftId(int fieldId) {
+      switch(fieldId) {
+        case 1: // TASK_ID
+          return TASK_ID;
+        case 2: // WORKFLOW_NODE_ID
+          return WORKFLOW_NODE_ID;
+        case 3: // EXPERIMENT_ID
+          return EXPERIMENT_ID;
+        default:
+          return null;
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, throwing an exception
+     * if it is not found.
+     */
+    public static _Fields findByThriftIdOrThrow(int fieldId) {
+      _Fields fields = findByThriftId(fieldId);
+      if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
+      return fields;
+    }
+
+    /**
+     * Find the _Fields constant that matches name, or null if its not found.
+     */
+    public static _Fields findByName(String name) {
+      return byName.get(name);
+    }
+
+    private final short _thriftId;
+    private final String _fieldName;
+
+    _Fields(short thriftId, String fieldName) {
+      _thriftId = thriftId;
+      _fieldName = fieldName;
+    }
+
+    public short getThriftFieldId() {
+      return _thriftId;
+    }
+
+    public String getFieldName() {
+      return _fieldName;
+    }
+  }
+
+  // isset id assignments
+  public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
+  static {
+    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
+    tmpMap.put(_Fields.TASK_ID, new org.apache.thrift.meta_data.FieldMetaData("taskId", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    tmpMap.put(_Fields.WORKFLOW_NODE_ID, new org.apache.thrift.meta_data.FieldMetaData("workflowNodeId", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    tmpMap.put(_Fields.EXPERIMENT_ID, new org.apache.thrift.meta_data.FieldMetaData("experimentId", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    metaDataMap = Collections.unmodifiableMap(tmpMap);
+    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(TaskIdentity.class, metaDataMap);
+  }
+
+  public TaskIdentity() {
+  }
+
+  public TaskIdentity(
+    String taskId,
+    String workflowNodeId,
+    String experimentId)
+  {
+    this();
+    this.taskId = taskId;
+    this.workflowNodeId = workflowNodeId;
+    this.experimentId = experimentId;
+  }
+
+  /**
+   * Performs a deep copy on <i>other</i>.
+   */
+  public TaskIdentity(TaskIdentity other) {
+    if (other.isSetTaskId()) {
+      this.taskId = other.taskId;
+    }
+    if (other.isSetWorkflowNodeId()) {
+      this.workflowNodeId = other.workflowNodeId;
+    }
+    if (other.isSetExperimentId()) {
+      this.experimentId = other.experimentId;
+    }
+  }
+
+  public TaskIdentity deepCopy() {
+    return new TaskIdentity(this);
+  }
+
+  @Override
+  public void clear() {
+    this.taskId = null;
+    this.workflowNodeId = null;
+    this.experimentId = null;
+  }
+
+  public String getTaskId() {
+    return this.taskId;
+  }
+
+  public void setTaskId(String taskId) {
+    this.taskId = taskId;
+  }
+
+  public void unsetTaskId() {
+    this.taskId = null;
+  }
+
+  /** Returns true if field taskId is set (has been assigned a value) and false otherwise */
+  public boolean isSetTaskId() {
+    return this.taskId != null;
+  }
+
+  public void setTaskIdIsSet(boolean value) {
+    if (!value) {
+      this.taskId = null;
+    }
+  }
+
+  public String getWorkflowNodeId() {
+    return this.workflowNodeId;
+  }
+
+  public void setWorkflowNodeId(String workflowNodeId) {
+    this.workflowNodeId = workflowNodeId;
+  }
+
+  public void unsetWorkflowNodeId() {
+    this.workflowNodeId = null;
+  }
+
+  /** Returns true if field workflowNodeId is set (has been assigned a value) and false otherwise */
+  public boolean isSetWorkflowNodeId() {
+    return this.workflowNodeId != null;
+  }
+
+  public void setWorkflowNodeIdIsSet(boolean value) {
+    if (!value) {
+      this.workflowNodeId = null;
+    }
+  }
+
+  public String getExperimentId() {
+    return this.experimentId;
+  }
+
+  public void setExperimentId(String experimentId) {
+    this.experimentId = experimentId;
+  }
+
+  public void unsetExperimentId() {
+    this.experimentId = null;
+  }
+
+  /** Returns true if field experimentId is set (has been assigned a value) and false otherwise */
+  public boolean isSetExperimentId() {
+    return this.experimentId != null;
+  }
+
+  public void setExperimentIdIsSet(boolean value) {
+    if (!value) {
+      this.experimentId = null;
+    }
+  }
+
+  public void setFieldValue(_Fields field, Object value) {
+    switch (field) {
+    case TASK_ID:
+      if (value == null) {
+        unsetTaskId();
+      } else {
+        setTaskId((String)value);
+      }
+      break;
+
+    case WORKFLOW_NODE_ID:
+      if (value == null) {
+        unsetWorkflowNodeId();
+      } else {
+        setWorkflowNodeId((String)value);
+      }
+      break;
+
+    case EXPERIMENT_ID:
+      if (value == null) {
+        unsetExperimentId();
+      } else {
+        setExperimentId((String)value);
+      }
+      break;
+
+    }
+  }
+
+  public Object getFieldValue(_Fields field) {
+    switch (field) {
+    case TASK_ID:
+      return getTaskId();
+
+    case WORKFLOW_NODE_ID:
+      return getWorkflowNodeId();
+
+    case EXPERIMENT_ID:
+      return getExperimentId();
+
+    }
+    throw new IllegalStateException();
+  }
+
+  /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
+  public boolean isSet(_Fields field) {
+    if (field == null) {
+      throw new IllegalArgumentException();
+    }
+
+    switch (field) {
+    case TASK_ID:
+      return isSetTaskId();
+    case WORKFLOW_NODE_ID:
+      return isSetWorkflowNodeId();
+    case EXPERIMENT_ID:
+      return isSetExperimentId();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public boolean equals(Object that) {
+    if (that == null)
+      return false;
+    if (that instanceof TaskIdentity)
+      return this.equals((TaskIdentity)that);
+    return false;
+  }
+
+  public boolean equals(TaskIdentity that) {
+    if (that == null)
+      return false;
+
+    boolean this_present_taskId = true && this.isSetTaskId();
+    boolean that_present_taskId = true && that.isSetTaskId();
+    if (this_present_taskId || that_present_taskId) {
+      if (!(this_present_taskId && that_present_taskId))
+        return false;
+      if (!this.taskId.equals(that.taskId))
+        return false;
+    }
+
+    boolean this_present_workflowNodeId = true && this.isSetWorkflowNodeId();
+    boolean that_present_workflowNodeId = true && that.isSetWorkflowNodeId();
+    if (this_present_workflowNodeId || that_present_workflowNodeId) {
+      if (!(this_present_workflowNodeId && that_present_workflowNodeId))
+        return false;
+      if (!this.workflowNodeId.equals(that.workflowNodeId))
+        return false;
+    }
+
+    boolean this_present_experimentId = true && this.isSetExperimentId();
+    boolean that_present_experimentId = true && that.isSetExperimentId();
+    if (this_present_experimentId || that_present_experimentId) {
+      if (!(this_present_experimentId && that_present_experimentId))
+        return false;
+      if (!this.experimentId.equals(that.experimentId))
+        return false;
+    }
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return 0;
+  }
+
+  @Override
+  public int compareTo(TaskIdentity other) {
+    if (!getClass().equals(other.getClass())) {
+      return getClass().getName().compareTo(other.getClass().getName());
+    }
+
+    int lastComparison = 0;
+
+    lastComparison = Boolean.valueOf(isSetTaskId()).compareTo(other.isSetTaskId());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetTaskId()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.taskId, other.taskId);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetWorkflowNodeId()).compareTo(other.isSetWorkflowNodeId());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetWorkflowNodeId()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.workflowNodeId, other.workflowNodeId);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetExperimentId()).compareTo(other.isSetExperimentId());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetExperimentId()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.experimentId, other.experimentId);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    return 0;
+  }
+
+  public _Fields fieldForId(int fieldId) {
+    return _Fields.findByThriftId(fieldId);
+  }
+
+  public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
+    schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
+  }
+
+  public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
+    schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder("TaskIdentity(");
+    boolean first = true;
+
+    sb.append("taskId:");
+    if (this.taskId == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.taskId);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("workflowNodeId:");
+    if (this.workflowNodeId == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.workflowNodeId);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("experimentId:");
+    if (this.experimentId == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.experimentId);
+    }
+    first = false;
+    sb.append(")");
+    return sb.toString();
+  }
+
+  public void validate() throws org.apache.thrift.TException {
+    // check for required fields
+    if (!isSetTaskId()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'taskId' is unset! Struct:" + toString());
+    }
+
+    if (!isSetWorkflowNodeId()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'workflowNodeId' is unset! Struct:" + toString());
+    }
+
+    if (!isSetExperimentId()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'experimentId' is unset! Struct:" + toString());
+    }
+
+    // check for sub-struct validity
+  }
+
+  private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
+    try {
+      write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+    try {
+      read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private static class TaskIdentityStandardSchemeFactory implements SchemeFactory {
+    public TaskIdentityStandardScheme getScheme() {
+      return new TaskIdentityStandardScheme();
+    }
+  }
+
+  private static class TaskIdentityStandardScheme extends StandardScheme<TaskIdentity> {
+
+    public void read(org.apache.thrift.protocol.TProtocol iprot, TaskIdentity struct) throws org.apache.thrift.TException {
+      org.apache.thrift.protocol.TField schemeField;
+      iprot.readStructBegin();
+      while (true)
+      {
+        schemeField = iprot.readFieldBegin();
+        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
+          break;
+        }
+        switch (schemeField.id) {
+          case 1: // TASK_ID
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
+              struct.taskId = iprot.readString();
+              struct.setTaskIdIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 2: // WORKFLOW_NODE_ID
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
+              struct.workflowNodeId = iprot.readString();
+              struct.setWorkflowNodeIdIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 3: // EXPERIMENT_ID
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
+              struct.experimentId = iprot.readString();
+              struct.setExperimentIdIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          default:
+            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+        }
+        iprot.readFieldEnd();
+      }
+      iprot.readStructEnd();
+      struct.validate();
+    }
+
+    public void write(org.apache.thrift.protocol.TProtocol oprot, TaskIdentity struct) throws org.apache.thrift.TException {
+      struct.validate();
+
+      oprot.writeStructBegin(STRUCT_DESC);
+      if (struct.taskId != null) {
+        oprot.writeFieldBegin(TASK_ID_FIELD_DESC);
+        oprot.writeString(struct.taskId);
+        oprot.writeFieldEnd();
+      }
+      if (struct.workflowNodeId != null) {
+        oprot.writeFieldBegin(WORKFLOW_NODE_ID_FIELD_DESC);
+        oprot.writeString(struct.workflowNodeId);
+        oprot.writeFieldEnd();
+      }
+      if (struct.experimentId != null) {
+        oprot.writeFieldBegin(EXPERIMENT_ID_FIELD_DESC);
+        oprot.writeString(struct.experimentId);
+        oprot.writeFieldEnd();
+      }
+      oprot.writeFieldStop();
+      oprot.writeStructEnd();
+    }
+
+  }
+
+  private static class TaskIdentityTupleSchemeFactory implements SchemeFactory {
+    public TaskIdentityTupleScheme getScheme() {
+      return new TaskIdentityTupleScheme();
+    }
+  }
+
+  private static class TaskIdentityTupleScheme extends TupleScheme<TaskIdentity> {
+
+    @Override
+    public void write(org.apache.thrift.protocol.TProtocol prot, TaskIdentity struct) throws org.apache.thrift.TException {
+      TTupleProtocol oprot = (TTupleProtocol) prot;
+      oprot.writeString(struct.taskId);
+      oprot.writeString(struct.workflowNodeId);
+      oprot.writeString(struct.experimentId);
+    }
+
+    @Override
+    public void read(org.apache.thrift.protocol.TProtocol prot, TaskIdentity struct) throws org.apache.thrift.TException {
+      TTupleProtocol iprot = (TTupleProtocol) prot;
+      struct.taskId = iprot.readString();
+      struct.setTaskIdIsSet(true);
+      struct.workflowNodeId = iprot.readString();
+      struct.setWorkflowNodeIdIsSet(true);
+      struct.experimentId = iprot.readString();
+      struct.setExperimentIdIsSet(true);
+    }
+  }
+
+}
+

http://git-wip-us.apache.org/repos/asf/airavata/blob/1fe3d1d8/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskStatusChangeEvent.java
----------------------------------------------------------------------
diff --git a/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskStatusChangeEvent.java b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskStatusChangeEvent.java
new file mode 100644
index 0000000..a206f0b
--- /dev/null
+++ b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/TaskStatusChangeEvent.java
@@ -0,0 +1,509 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Autogenerated by Thrift Compiler (0.9.1)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+package org.apache.airavata.model.messaging.event;
+
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.SchemeFactory;
+import org.apache.thrift.scheme.StandardScheme;
+
+import org.apache.thrift.scheme.TupleScheme;
+import org.apache.thrift.protocol.TTupleProtocol;
+import org.apache.thrift.protocol.TProtocolException;
+import org.apache.thrift.EncodingUtils;
+import org.apache.thrift.TException;
+import org.apache.thrift.async.AsyncMethodCallback;
+import org.apache.thrift.server.AbstractNonblockingServer.*;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.EnumMap;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.EnumSet;
+import java.util.Collections;
+import java.util.BitSet;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("all") public class TaskStatusChangeEvent implements org.apache.thrift.TBase<TaskStatusChangeEvent, TaskStatusChangeEvent._Fields>, java.io.Serializable, Cloneable, Comparable<TaskStatusChangeEvent> {
+  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("TaskStatusChangeEvent");
+
+  private static final org.apache.thrift.protocol.TField STATE_FIELD_DESC = new org.apache.thrift.protocol.TField("state", org.apache.thrift.protocol.TType.I32, (short)1);
+  private static final org.apache.thrift.protocol.TField TASK_IDENTITY_FIELD_DESC = new org.apache.thrift.protocol.TField("taskIdentity", org.apache.thrift.protocol.TType.STRUCT, (short)2);
+
+  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = new HashMap<Class<? extends IScheme>, SchemeFactory>();
+  static {
+    schemes.put(StandardScheme.class, new TaskStatusChangeEventStandardSchemeFactory());
+    schemes.put(TupleScheme.class, new TaskStatusChangeEventTupleSchemeFactory());
+  }
+
+  private org.apache.airavata.model.workspace.experiment.TaskState state; // required
+  private TaskIdentity taskIdentity; // required
+
+  /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
+  @SuppressWarnings("all") public enum _Fields implements org.apache.thrift.TFieldIdEnum {
+    /**
+     * 
+     * @see org.apache.airavata.model.workspace.experiment.TaskState
+     */
+    STATE((short)1, "state"),
+    TASK_IDENTITY((short)2, "taskIdentity");
+
+    private static final Map<String, _Fields> byName = new HashMap<String, _Fields>();
+
+    static {
+      for (_Fields field : EnumSet.allOf(_Fields.class)) {
+        byName.put(field.getFieldName(), field);
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, or null if its not found.
+     */
+    public static _Fields findByThriftId(int fieldId) {
+      switch(fieldId) {
+        case 1: // STATE
+          return STATE;
+        case 2: // TASK_IDENTITY
+          return TASK_IDENTITY;
+        default:
+          return null;
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, throwing an exception
+     * if it is not found.
+     */
+    public static _Fields findByThriftIdOrThrow(int fieldId) {
+      _Fields fields = findByThriftId(fieldId);
+      if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
+      return fields;
+    }
+
+    /**
+     * Find the _Fields constant that matches name, or null if its not found.
+     */
+    public static _Fields findByName(String name) {
+      return byName.get(name);
+    }
+
+    private final short _thriftId;
+    private final String _fieldName;
+
+    _Fields(short thriftId, String fieldName) {
+      _thriftId = thriftId;
+      _fieldName = fieldName;
+    }
+
+    public short getThriftFieldId() {
+      return _thriftId;
+    }
+
+    public String getFieldName() {
+      return _fieldName;
+    }
+  }
+
+  // isset id assignments
+  public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
+  static {
+    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
+    tmpMap.put(_Fields.STATE, new org.apache.thrift.meta_data.FieldMetaData("state", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.EnumMetaData(org.apache.thrift.protocol.TType.ENUM, org.apache.airavata.model.workspace.experiment.TaskState.class)));
+    tmpMap.put(_Fields.TASK_IDENTITY, new org.apache.thrift.meta_data.FieldMetaData("taskIdentity", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.StructMetaData(org.apache.thrift.protocol.TType.STRUCT, TaskIdentity.class)));
+    metaDataMap = Collections.unmodifiableMap(tmpMap);
+    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(TaskStatusChangeEvent.class, metaDataMap);
+  }
+
+  public TaskStatusChangeEvent() {
+  }
+
+  public TaskStatusChangeEvent(
+    org.apache.airavata.model.workspace.experiment.TaskState state,
+    TaskIdentity taskIdentity)
+  {
+    this();
+    this.state = state;
+    this.taskIdentity = taskIdentity;
+  }
+
+  /**
+   * Performs a deep copy on <i>other</i>.
+   */
+  public TaskStatusChangeEvent(TaskStatusChangeEvent other) {
+    if (other.isSetState()) {
+      this.state = other.state;
+    }
+    if (other.isSetTaskIdentity()) {
+      this.taskIdentity = new TaskIdentity(other.taskIdentity);
+    }
+  }
+
+  public TaskStatusChangeEvent deepCopy() {
+    return new TaskStatusChangeEvent(this);
+  }
+
+  @Override
+  public void clear() {
+    this.state = null;
+    this.taskIdentity = null;
+  }
+
+  /**
+   * 
+   * @see org.apache.airavata.model.workspace.experiment.TaskState
+   */
+  public org.apache.airavata.model.workspace.experiment.TaskState getState() {
+    return this.state;
+  }
+
+  /**
+   * 
+   * @see org.apache.airavata.model.workspace.experiment.TaskState
+   */
+  public void setState(org.apache.airavata.model.workspace.experiment.TaskState state) {
+    this.state = state;
+  }
+
+  public void unsetState() {
+    this.state = null;
+  }
+
+  /** Returns true if field state is set (has been assigned a value) and false otherwise */
+  public boolean isSetState() {
+    return this.state != null;
+  }
+
+  public void setStateIsSet(boolean value) {
+    if (!value) {
+      this.state = null;
+    }
+  }
+
+  public TaskIdentity getTaskIdentity() {
+    return this.taskIdentity;
+  }
+
+  public void setTaskIdentity(TaskIdentity taskIdentity) {
+    this.taskIdentity = taskIdentity;
+  }
+
+  public void unsetTaskIdentity() {
+    this.taskIdentity = null;
+  }
+
+  /** Returns true if field taskIdentity is set (has been assigned a value) and false otherwise */
+  public boolean isSetTaskIdentity() {
+    return this.taskIdentity != null;
+  }
+
+  public void setTaskIdentityIsSet(boolean value) {
+    if (!value) {
+      this.taskIdentity = null;
+    }
+  }
+
+  public void setFieldValue(_Fields field, Object value) {
+    switch (field) {
+    case STATE:
+      if (value == null) {
+        unsetState();
+      } else {
+        setState((org.apache.airavata.model.workspace.experiment.TaskState)value);
+      }
+      break;
+
+    case TASK_IDENTITY:
+      if (value == null) {
+        unsetTaskIdentity();
+      } else {
+        setTaskIdentity((TaskIdentity)value);
+      }
+      break;
+
+    }
+  }
+
+  public Object getFieldValue(_Fields field) {
+    switch (field) {
+    case STATE:
+      return getState();
+
+    case TASK_IDENTITY:
+      return getTaskIdentity();
+
+    }
+    throw new IllegalStateException();
+  }
+
+  /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
+  public boolean isSet(_Fields field) {
+    if (field == null) {
+      throw new IllegalArgumentException();
+    }
+
+    switch (field) {
+    case STATE:
+      return isSetState();
+    case TASK_IDENTITY:
+      return isSetTaskIdentity();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public boolean equals(Object that) {
+    if (that == null)
+      return false;
+    if (that instanceof TaskStatusChangeEvent)
+      return this.equals((TaskStatusChangeEvent)that);
+    return false;
+  }
+
+  public boolean equals(TaskStatusChangeEvent that) {
+    if (that == null)
+      return false;
+
+    boolean this_present_state = true && this.isSetState();
+    boolean that_present_state = true && that.isSetState();
+    if (this_present_state || that_present_state) {
+      if (!(this_present_state && that_present_state))
+        return false;
+      if (!this.state.equals(that.state))
+        return false;
+    }
+
+    boolean this_present_taskIdentity = true && this.isSetTaskIdentity();
+    boolean that_present_taskIdentity = true && that.isSetTaskIdentity();
+    if (this_present_taskIdentity || that_present_taskIdentity) {
+      if (!(this_present_taskIdentity && that_present_taskIdentity))
+        return false;
+      if (!this.taskIdentity.equals(that.taskIdentity))
+        return false;
+    }
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return 0;
+  }
+
+  @Override
+  public int compareTo(TaskStatusChangeEvent other) {
+    if (!getClass().equals(other.getClass())) {
+      return getClass().getName().compareTo(other.getClass().getName());
+    }
+
+    int lastComparison = 0;
+
+    lastComparison = Boolean.valueOf(isSetState()).compareTo(other.isSetState());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetState()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.state, other.state);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetTaskIdentity()).compareTo(other.isSetTaskIdentity());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetTaskIdentity()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.taskIdentity, other.taskIdentity);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    return 0;
+  }
+
+  public _Fields fieldForId(int fieldId) {
+    return _Fields.findByThriftId(fieldId);
+  }
+
+  public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
+    schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
+  }
+
+  public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
+    schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder("TaskStatusChangeEvent(");
+    boolean first = true;
+
+    sb.append("state:");
+    if (this.state == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.state);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("taskIdentity:");
+    if (this.taskIdentity == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.taskIdentity);
+    }
+    first = false;
+    sb.append(")");
+    return sb.toString();
+  }
+
+  public void validate() throws org.apache.thrift.TException {
+    // check for required fields
+    if (!isSetState()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'state' is unset! Struct:" + toString());
+    }
+
+    if (!isSetTaskIdentity()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'taskIdentity' is unset! Struct:" + toString());
+    }
+
+    // check for sub-struct validity
+    if (taskIdentity != null) {
+      taskIdentity.validate();
+    }
+  }
+
+  private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
+    try {
+      write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+    try {
+      read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private static class TaskStatusChangeEventStandardSchemeFactory implements SchemeFactory {
+    public TaskStatusChangeEventStandardScheme getScheme() {
+      return new TaskStatusChangeEventStandardScheme();
+    }
+  }
+
+  private static class TaskStatusChangeEventStandardScheme extends StandardScheme<TaskStatusChangeEvent> {
+
+    public void read(org.apache.thrift.protocol.TProtocol iprot, TaskStatusChangeEvent struct) throws org.apache.thrift.TException {
+      org.apache.thrift.protocol.TField schemeField;
+      iprot.readStructBegin();
+      while (true)
+      {
+        schemeField = iprot.readFieldBegin();
+        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
+          break;
+        }
+        switch (schemeField.id) {
+          case 1: // STATE
+            if (schemeField.type == org.apache.thrift.protocol.TType.I32) {
+              struct.state = org.apache.airavata.model.workspace.experiment.TaskState.findByValue(iprot.readI32());
+              struct.setStateIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 2: // TASK_IDENTITY
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRUCT) {
+              struct.taskIdentity = new TaskIdentity();
+              struct.taskIdentity.read(iprot);
+              struct.setTaskIdentityIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          default:
+            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+        }
+        iprot.readFieldEnd();
+      }
+      iprot.readStructEnd();
+      struct.validate();
+    }
+
+    public void write(org.apache.thrift.protocol.TProtocol oprot, TaskStatusChangeEvent struct) throws org.apache.thrift.TException {
+      struct.validate();
+
+      oprot.writeStructBegin(STRUCT_DESC);
+      if (struct.state != null) {
+        oprot.writeFieldBegin(STATE_FIELD_DESC);
+        oprot.writeI32(struct.state.getValue());
+        oprot.writeFieldEnd();
+      }
+      if (struct.taskIdentity != null) {
+        oprot.writeFieldBegin(TASK_IDENTITY_FIELD_DESC);
+        struct.taskIdentity.write(oprot);
+        oprot.writeFieldEnd();
+      }
+      oprot.writeFieldStop();
+      oprot.writeStructEnd();
+    }
+
+  }
+
+  private static class TaskStatusChangeEventTupleSchemeFactory implements SchemeFactory {
+    public TaskStatusChangeEventTupleScheme getScheme() {
+      return new TaskStatusChangeEventTupleScheme();
+    }
+  }
+
+  private static class TaskStatusChangeEventTupleScheme extends TupleScheme<TaskStatusChangeEvent> {
+
+    @Override
+    public void write(org.apache.thrift.protocol.TProtocol prot, TaskStatusChangeEvent struct) throws org.apache.thrift.TException {
+      TTupleProtocol oprot = (TTupleProtocol) prot;
+      oprot.writeI32(struct.state.getValue());
+      struct.taskIdentity.write(oprot);
+    }
+
+    @Override
+    public void read(org.apache.thrift.protocol.TProtocol prot, TaskStatusChangeEvent struct) throws org.apache.thrift.TException {
+      TTupleProtocol iprot = (TTupleProtocol) prot;
+      struct.state = org.apache.airavata.model.workspace.experiment.TaskState.findByValue(iprot.readI32());
+      struct.setStateIsSet(true);
+      struct.taskIdentity = new TaskIdentity();
+      struct.taskIdentity.read(iprot);
+      struct.setTaskIdentityIsSet(true);
+    }
+  }
+
+}
+

http://git-wip-us.apache.org/repos/asf/airavata/blob/1fe3d1d8/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/WorkflowIdentity.java
----------------------------------------------------------------------
diff --git a/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/WorkflowIdentity.java b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/WorkflowIdentity.java
new file mode 100644
index 0000000..7c57a56
--- /dev/null
+++ b/airavata-api/airavata-data-models/src/main/java/org/apache/airavata/model/messaging/event/WorkflowIdentity.java
@@ -0,0 +1,492 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Autogenerated by Thrift Compiler (0.9.1)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+package org.apache.airavata.model.messaging.event;
+
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.SchemeFactory;
+import org.apache.thrift.scheme.StandardScheme;
+
+import org.apache.thrift.scheme.TupleScheme;
+import org.apache.thrift.protocol.TTupleProtocol;
+import org.apache.thrift.protocol.TProtocolException;
+import org.apache.thrift.EncodingUtils;
+import org.apache.thrift.TException;
+import org.apache.thrift.async.AsyncMethodCallback;
+import org.apache.thrift.server.AbstractNonblockingServer.*;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.EnumMap;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.EnumSet;
+import java.util.Collections;
+import java.util.BitSet;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("all") public class WorkflowIdentity implements org.apache.thrift.TBase<WorkflowIdentity, WorkflowIdentity._Fields>, java.io.Serializable, Cloneable, Comparable<WorkflowIdentity> {
+  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("WorkflowIdentity");
+
+  private static final org.apache.thrift.protocol.TField WORKFLOW_NODE_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("workflowNodeId", org.apache.thrift.protocol.TType.STRING, (short)1);
+  private static final org.apache.thrift.protocol.TField EXPERIMENT_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("experimentId", org.apache.thrift.protocol.TType.STRING, (short)2);
+
+  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = new HashMap<Class<? extends IScheme>, SchemeFactory>();
+  static {
+    schemes.put(StandardScheme.class, new WorkflowIdentityStandardSchemeFactory());
+    schemes.put(TupleScheme.class, new WorkflowIdentityTupleSchemeFactory());
+  }
+
+  private String workflowNodeId; // required
+  private String experimentId; // required
+
+  /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
+  @SuppressWarnings("all") public enum _Fields implements org.apache.thrift.TFieldIdEnum {
+    WORKFLOW_NODE_ID((short)1, "workflowNodeId"),
+    EXPERIMENT_ID((short)2, "experimentId");
+
+    private static final Map<String, _Fields> byName = new HashMap<String, _Fields>();
+
+    static {
+      for (_Fields field : EnumSet.allOf(_Fields.class)) {
+        byName.put(field.getFieldName(), field);
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, or null if its not found.
+     */
+    public static _Fields findByThriftId(int fieldId) {
+      switch(fieldId) {
+        case 1: // WORKFLOW_NODE_ID
+          return WORKFLOW_NODE_ID;
+        case 2: // EXPERIMENT_ID
+          return EXPERIMENT_ID;
+        default:
+          return null;
+      }
+    }
+
+    /**
+     * Find the _Fields constant that matches fieldId, throwing an exception
+     * if it is not found.
+     */
+    public static _Fields findByThriftIdOrThrow(int fieldId) {
+      _Fields fields = findByThriftId(fieldId);
+      if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
+      return fields;
+    }
+
+    /**
+     * Find the _Fields constant that matches name, or null if its not found.
+     */
+    public static _Fields findByName(String name) {
+      return byName.get(name);
+    }
+
+    private final short _thriftId;
+    private final String _fieldName;
+
+    _Fields(short thriftId, String fieldName) {
+      _thriftId = thriftId;
+      _fieldName = fieldName;
+    }
+
+    public short getThriftFieldId() {
+      return _thriftId;
+    }
+
+    public String getFieldName() {
+      return _fieldName;
+    }
+  }
+
+  // isset id assignments
+  public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
+  static {
+    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
+    tmpMap.put(_Fields.WORKFLOW_NODE_ID, new org.apache.thrift.meta_data.FieldMetaData("workflowNodeId", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    tmpMap.put(_Fields.EXPERIMENT_ID, new org.apache.thrift.meta_data.FieldMetaData("experimentId", org.apache.thrift.TFieldRequirementType.REQUIRED, 
+        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    metaDataMap = Collections.unmodifiableMap(tmpMap);
+    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(WorkflowIdentity.class, metaDataMap);
+  }
+
+  public WorkflowIdentity() {
+  }
+
+  public WorkflowIdentity(
+    String workflowNodeId,
+    String experimentId)
+  {
+    this();
+    this.workflowNodeId = workflowNodeId;
+    this.experimentId = experimentId;
+  }
+
+  /**
+   * Performs a deep copy on <i>other</i>.
+   */
+  public WorkflowIdentity(WorkflowIdentity other) {
+    if (other.isSetWorkflowNodeId()) {
+      this.workflowNodeId = other.workflowNodeId;
+    }
+    if (other.isSetExperimentId()) {
+      this.experimentId = other.experimentId;
+    }
+  }
+
+  public WorkflowIdentity deepCopy() {
+    return new WorkflowIdentity(this);
+  }
+
+  @Override
+  public void clear() {
+    this.workflowNodeId = null;
+    this.experimentId = null;
+  }
+
+  public String getWorkflowNodeId() {
+    return this.workflowNodeId;
+  }
+
+  public void setWorkflowNodeId(String workflowNodeId) {
+    this.workflowNodeId = workflowNodeId;
+  }
+
+  public void unsetWorkflowNodeId() {
+    this.workflowNodeId = null;
+  }
+
+  /** Returns true if field workflowNodeId is set (has been assigned a value) and false otherwise */
+  public boolean isSetWorkflowNodeId() {
+    return this.workflowNodeId != null;
+  }
+
+  public void setWorkflowNodeIdIsSet(boolean value) {
+    if (!value) {
+      this.workflowNodeId = null;
+    }
+  }
+
+  public String getExperimentId() {
+    return this.experimentId;
+  }
+
+  public void setExperimentId(String experimentId) {
+    this.experimentId = experimentId;
+  }
+
+  public void unsetExperimentId() {
+    this.experimentId = null;
+  }
+
+  /** Returns true if field experimentId is set (has been assigned a value) and false otherwise */
+  public boolean isSetExperimentId() {
+    return this.experimentId != null;
+  }
+
+  public void setExperimentIdIsSet(boolean value) {
+    if (!value) {
+      this.experimentId = null;
+    }
+  }
+
+  public void setFieldValue(_Fields field, Object value) {
+    switch (field) {
+    case WORKFLOW_NODE_ID:
+      if (value == null) {
+        unsetWorkflowNodeId();
+      } else {
+        setWorkflowNodeId((String)value);
+      }
+      break;
+
+    case EXPERIMENT_ID:
+      if (value == null) {
+        unsetExperimentId();
+      } else {
+        setExperimentId((String)value);
+      }
+      break;
+
+    }
+  }
+
+  public Object getFieldValue(_Fields field) {
+    switch (field) {
+    case WORKFLOW_NODE_ID:
+      return getWorkflowNodeId();
+
+    case EXPERIMENT_ID:
+      return getExperimentId();
+
+    }
+    throw new IllegalStateException();
+  }
+
+  /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
+  public boolean isSet(_Fields field) {
+    if (field == null) {
+      throw new IllegalArgumentException();
+    }
+
+    switch (field) {
+    case WORKFLOW_NODE_ID:
+      return isSetWorkflowNodeId();
+    case EXPERIMENT_ID:
+      return isSetExperimentId();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public boolean equals(Object that) {
+    if (that == null)
+      return false;
+    if (that instanceof WorkflowIdentity)
+      return this.equals((WorkflowIdentity)that);
+    return false;
+  }
+
+  public boolean equals(WorkflowIdentity that) {
+    if (that == null)
+      return false;
+
+    boolean this_present_workflowNodeId = true && this.isSetWorkflowNodeId();
+    boolean that_present_workflowNodeId = true && that.isSetWorkflowNodeId();
+    if (this_present_workflowNodeId || that_present_workflowNodeId) {
+      if (!(this_present_workflowNodeId && that_present_workflowNodeId))
+        return false;
+      if (!this.workflowNodeId.equals(that.workflowNodeId))
+        return false;
+    }
+
+    boolean this_present_experimentId = true && this.isSetExperimentId();
+    boolean that_present_experimentId = true && that.isSetExperimentId();
+    if (this_present_experimentId || that_present_experimentId) {
+      if (!(this_present_experimentId && that_present_experimentId))
+        return false;
+      if (!this.experimentId.equals(that.experimentId))
+        return false;
+    }
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return 0;
+  }
+
+  @Override
+  public int compareTo(WorkflowIdentity other) {
+    if (!getClass().equals(other.getClass())) {
+      return getClass().getName().compareTo(other.getClass().getName());
+    }
+
+    int lastComparison = 0;
+
+    lastComparison = Boolean.valueOf(isSetWorkflowNodeId()).compareTo(other.isSetWorkflowNodeId());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetWorkflowNodeId()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.workflowNodeId, other.workflowNodeId);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    lastComparison = Boolean.valueOf(isSetExperimentId()).compareTo(other.isSetExperimentId());
+    if (lastComparison != 0) {
+      return lastComparison;
+    }
+    if (isSetExperimentId()) {
+      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.experimentId, other.experimentId);
+      if (lastComparison != 0) {
+        return lastComparison;
+      }
+    }
+    return 0;
+  }
+
+  public _Fields fieldForId(int fieldId) {
+    return _Fields.findByThriftId(fieldId);
+  }
+
+  public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
+    schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
+  }
+
+  public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
+    schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder("WorkflowIdentity(");
+    boolean first = true;
+
+    sb.append("workflowNodeId:");
+    if (this.workflowNodeId == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.workflowNodeId);
+    }
+    first = false;
+    if (!first) sb.append(", ");
+    sb.append("experimentId:");
+    if (this.experimentId == null) {
+      sb.append("null");
+    } else {
+      sb.append(this.experimentId);
+    }
+    first = false;
+    sb.append(")");
+    return sb.toString();
+  }
+
+  public void validate() throws org.apache.thrift.TException {
+    // check for required fields
+    if (!isSetWorkflowNodeId()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'workflowNodeId' is unset! Struct:" + toString());
+    }
+
+    if (!isSetExperimentId()) {
+      throw new org.apache.thrift.protocol.TProtocolException("Required field 'experimentId' is unset! Struct:" + toString());
+    }
+
+    // check for sub-struct validity
+  }
+
+  private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
+    try {
+      write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+    try {
+      read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
+    } catch (org.apache.thrift.TException te) {
+      throw new java.io.IOException(te);
+    }
+  }
+
+  private static class WorkflowIdentityStandardSchemeFactory implements SchemeFactory {
+    public WorkflowIdentityStandardScheme getScheme() {
+      return new WorkflowIdentityStandardScheme();
+    }
+  }
+
+  private static class WorkflowIdentityStandardScheme extends StandardScheme<WorkflowIdentity> {
+
+    public void read(org.apache.thrift.protocol.TProtocol iprot, WorkflowIdentity struct) throws org.apache.thrift.TException {
+      org.apache.thrift.protocol.TField schemeField;
+      iprot.readStructBegin();
+      while (true)
+      {
+        schemeField = iprot.readFieldBegin();
+        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
+          break;
+        }
+        switch (schemeField.id) {
+          case 1: // WORKFLOW_NODE_ID
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
+              struct.workflowNodeId = iprot.readString();
+              struct.setWorkflowNodeIdIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          case 2: // EXPERIMENT_ID
+            if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
+              struct.experimentId = iprot.readString();
+              struct.setExperimentIdIsSet(true);
+            } else { 
+              org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+            }
+            break;
+          default:
+            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
+        }
+        iprot.readFieldEnd();
+      }
+      iprot.readStructEnd();
+      struct.validate();
+    }
+
+    public void write(org.apache.thrift.protocol.TProtocol oprot, WorkflowIdentity struct) throws org.apache.thrift.TException {
+      struct.validate();
+
+      oprot.writeStructBegin(STRUCT_DESC);
+      if (struct.workflowNodeId != null) {
+        oprot.writeFieldBegin(WORKFLOW_NODE_ID_FIELD_DESC);
+        oprot.writeString(struct.workflowNodeId);
+        oprot.writeFieldEnd();
+      }
+      if (struct.experimentId != null) {
+        oprot.writeFieldBegin(EXPERIMENT_ID_FIELD_DESC);
+        oprot.writeString(struct.experimentId);
+        oprot.writeFieldEnd();
+      }
+      oprot.writeFieldStop();
+      oprot.writeStructEnd();
+    }
+
+  }
+
+  private static class WorkflowIdentityTupleSchemeFactory implements SchemeFactory {
+    public WorkflowIdentityTupleScheme getScheme() {
+      return new WorkflowIdentityTupleScheme();
+    }
+  }
+
+  private static class WorkflowIdentityTupleScheme extends TupleScheme<WorkflowIdentity> {
+
+    @Override
+    public void write(org.apache.thrift.protocol.TProtocol prot, WorkflowIdentity struct) throws org.apache.thrift.TException {
+      TTupleProtocol oprot = (TTupleProtocol) prot;
+      oprot.writeString(struct.workflowNodeId);
+      oprot.writeString(struct.experimentId);
+    }
+
+    @Override
+    public void read(org.apache.thrift.protocol.TProtocol prot, WorkflowIdentity struct) throws org.apache.thrift.TException {
+      TTupleProtocol iprot = (TTupleProtocol) prot;
+      struct.workflowNodeId = iprot.readString();
+      struct.setWorkflowNodeIdIsSet(true);
+      struct.experimentId = iprot.readString();
+      struct.setExperimentIdIsSet(true);
+    }
+  }
+
+}
+


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