/*
* 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.task;
import com.hazelcast.mapreduce.JobPartitionState;
import com.hazelcast.mapreduce.JobProcessInformation;
import com.hazelcast.mapreduce.impl.MapReducePortableHook;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Portable;
import com.hazelcast.nio.serialization.PortableReader;
import com.hazelcast.nio.serialization.PortableWriter;
import edu.umd.cs.findbugs.annotations.SuppressWarnings;
import java.io.IOException;
/**
* This implementation of {@link com.hazelcast.mapreduce.JobProcessInformation} is used to
* transmit the currently processed number of records and the partition states to a requesting
* client. This information can only be requested by the job emitting client and by requesting
* it at the job owner.
*/
public class TransferableJobProcessInformation
implements JobProcessInformation, Portable {
private JobPartitionState[] partitionStates;
private int processedRecords;
public TransferableJobProcessInformation() {
}
public TransferableJobProcessInformation(JobPartitionState[] partitionStates, int processedRecords) {
this.partitionStates = new JobPartitionState[partitionStates.length];
System.arraycopy(partitionStates, 0, this.partitionStates, 0, partitionStates.length);
this.processedRecords = processedRecords;
}
@Override
// This field is explicitly exposed since it is guarded by a serialization cycle
// or by a copy inside the constructor. This class is only used for transfer of
// the states and user can change it without breaking anything.
@SuppressWarnings("EI_EXPOSE_REP")
public JobPartitionState[] getPartitionStates() {
return partitionStates;
}
@Override
public int getProcessedRecords() {
return processedRecords;
}
@Override
public void writePortable(PortableWriter writer)
throws IOException {
writer.writeInt("processedRecords", processedRecords);
ObjectDataOutput out = writer.getRawDataOutput();
out.writeObject(partitionStates);
}
@Override
public void readPortable(PortableReader reader)
throws IOException {
processedRecords = reader.readInt("processedRecords");
ObjectDataInput in = reader.getRawDataInput();
partitionStates = in.readObject();
}
@Override
public int getFactoryId() {
return MapReducePortableHook.F_ID;
}
@Override
public int getClassId() {
return MapReducePortableHook.TRANSFERABLE_PROCESS_INFORMATION;
}
}