hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/structure/io/HadoopPoolShimService.java

/*
 * 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.
 */
package org.apache.tinkerpop.gremlin.hadoop.structure.io;

import org.apache.commons.configuration.Configuration;
import org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.KryoShimService;
import org.apache.tinkerpop.shaded.kryo.io.Input;
import org.apache.tinkerpop.shaded.kryo.io.Output;

import java.io.InputStream;
import java.io.OutputStream;

public class HadoopPoolShimService implements KryoShimService {

    @Override
    public Object readClassAndObject(final InputStream inputStream) {
        return HadoopPools.getGryoPool().readWithKryo(kryo -> kryo.readClassAndObject(new Input(inputStream)));
    }

    @Override
    public void writeClassAndObject(final Object object, final OutputStream outputStream) {
        HadoopPools.getGryoPool().writeWithKryo(kryo -> {
            final Output output = new Output(outputStream);
            kryo.writeClassAndObject(output, object);
            output.flush();
        });
    }

    @Override
    public void applyConfiguration(final Configuration configuration) {
        HadoopPools.initialize(configuration);
    }

    @Override
    public void close() {
        HadoopPools.close();
    }

    @Override
    public int getPriority() {
        return 0;
    }
}