/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.mapreduce.impl.operation;
import com.hazelcast.mapreduce.impl.AbstractJobTracker;
import com.hazelcast.mapreduce.impl.MapReduceDataSerializerHook;
import com.hazelcast.mapreduce.impl.MapReduceService;
import com.hazelcast.mapreduce.impl.task.JobSupervisor;
import java.util.Map;
/**
* This operation is used to retrieve results from a remote node
*/
public class GetResultOperation
extends ProcessingOperation {
private volatile Map result;
public GetResultOperation() {
}
public GetResultOperation(String name, String jobId) {
super(name, jobId);
}
public Map getResult() {
return result;
}
@Override
public void run()
throws Exception {
MapReduceService mapReduceService = getService();
JobSupervisor supervisor = mapReduceService.getJobSupervisor(getName(), getJobId());
if (supervisor != null) {
result = supervisor.getJobResults();
// This is the final call so cleanup on all nodes that are not job owners
if (!supervisor.isOwnerNode()) {
mapReduceService.destroyJobSupervisor(supervisor);
AbstractJobTracker jobTracker = (AbstractJobTracker) mapReduceService.getJobTracker(getName());
jobTracker.unregisterTrackableJob(getJobId());
jobTracker.unregisterMapCombineTask(getJobId());
jobTracker.unregisterReducerTask(getJobId());
}
}
}
@Override
public Object getResponse() {
return result;
}
@Override
public int getFactoryId() {
return MapReduceDataSerializerHook.F_ID;
}
@Override
public int getId() {
return MapReduceDataSerializerHook.GET_RESULT_OPERATION;
}
}