/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License 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.
**********************************************************************************************************************/
package eu.stratosphere.nephele.event.job;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import eu.stratosphere.core.io.StringRecord;
import eu.stratosphere.nephele.managementgraph.ManagementVertexID;
/**
* A {@link VertexAssignmentEvent} can be used to notify other objects about changes in the assignment of vertices to
* instances.
*
*/
public final class VertexAssignmentEvent extends AbstractEvent implements ManagementEvent {
/**
* The ID identifies the vertex this events refers to.
*/
private ManagementVertexID managementVertexID;
/**
* The name of the instance the vertex is now assigned to.
*/
private String instanceName;
/**
* The type of the instance the vertex is now assigned to.
*/
private String instanceType;
/**
* Constructs a new event.
*
* @param timestamp
* the timestamp of the event
* @param managementVertexID
* identifies the vertex this event refers to
* @param instanceName
* the name of the instance the vertex is now assigned to
* @param instanceType
* the type of the instance the vertex is now assigned to
*/
public VertexAssignmentEvent(final long timestamp, final ManagementVertexID managementVertexID,
final String instanceName, final String instanceType) {
super(timestamp);
this.managementVertexID = managementVertexID;
this.instanceName = instanceName;
this.instanceType = instanceType;
}
/**
* Constructor for serialization/deserialization. Should not be called on other occasions.
*/
public VertexAssignmentEvent() {
super();
this.managementVertexID = new ManagementVertexID();
}
/**
* Returns the ID of the vertex this event refers to.
*
* @return the ID of the vertex this event refers to
*/
public ManagementVertexID getVertexID() {
return this.managementVertexID;
}
/**
* Returns the name of the instance the vertex is now assigned to.
*
* @return the name of the instance the vertex is now assigned to
*/
public String getInstanceName() {
return this.instanceName;
}
/**
* Returns the type of the instance the vertex is now assigned to.
*
* @return the type of the instance the vertex is now assigned to
*/
public String getInstanceType() {
return this.instanceType;
}
@Override
public void read(final DataInput in) throws IOException {
super.read(in);
this.managementVertexID.read(in);
this.instanceName = StringRecord.readString(in);
this.instanceType = StringRecord.readString(in);
}
@Override
public void write(final DataOutput out) throws IOException {
super.write(out);
this.managementVertexID.write(out);
StringRecord.writeString(out, this.instanceName);
StringRecord.writeString(out, this.instanceType);
}
@Override
public boolean equals(final Object obj) {
if (!super.equals(obj)) {
return false;
}
if (!(obj instanceof VertexAssignmentEvent)) {
return false;
}
final VertexAssignmentEvent vae = (VertexAssignmentEvent) obj;
if (!this.managementVertexID.equals(vae.getVertexID())) {
return false;
}
if (this.instanceName == null) {
if (vae.getInstanceName() != null) {
return false;
}
} else {
if (!this.instanceName.equals(vae.getInstanceName())) {
return false;
}
}
if (this.instanceType == null) {
if (vae.getInstanceType() != null) {
return false;
}
} else {
if (!this.instanceType.equals(vae.getInstanceType())) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
if (this.managementVertexID != null) {
return this.managementVertexID.hashCode();
}
return super.hashCode();
}
}