com.hazelcast.mapreduce.impl.JobPartitionStateSerializerHook Maven / Gradle / Ivy

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Core Hazelcast Module
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/*
 * 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;

import com.hazelcast.mapreduce.JobPartitionState;
import com.hazelcast.mapreduce.impl.task.JobPartitionStateImpl;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.SerializationConstants;
import com.hazelcast.nio.serialization.Serializer;
import com.hazelcast.nio.serialization.SerializerHook;
import com.hazelcast.nio.serialization.StreamSerializer;

import java.io.IOException;

/**
 * This class is the auto registered serializer hook for a {@link com.hazelcast.mapreduce.JobPartitionState}.
 */
public class JobPartitionStateSerializerHook
        implements SerializerHook {

    @Override
    public Class getSerializationType() {
        return JobPartitionStateImpl.class;
    }

    @Override
    public Serializer createSerializer() {
        return new JobPartitionStateSerializer();
    }

    @Override
    public boolean isOverwritable() {
        return false;
    }

    /**
     * The {@link com.hazelcast.mapreduce.JobPartitionState} serializer itself
     */
    private static class JobPartitionStateSerializer
            implements StreamSerializer {

        @Override
        public void write(ObjectDataOutput out, JobPartitionStateImpl partitionState)
                throws IOException {
            out.writeBoolean(partitionState != null);
            if (partitionState != null) {
                out.writeObject(partitionState.getOwner());
                out.writeInt(partitionState.getState().ordinal());
            }
        }

        @Override
        public JobPartitionStateImpl read(ObjectDataInput in)
                throws IOException {
            if (in.readBoolean()) {
                Address owner = in.readObject();
                JobPartitionState.State state = JobPartitionState.State.byOrdinal(in.readInt());
                return new JobPartitionStateImpl(owner, state);
            }
            return null;
        }

        @Override
        public int getTypeId() {
            return SerializationConstants.AUTO_TYPE_JOB_PARTITION_STATE;
        }

        @Override
        public void destroy() {
        }
    }

}