org.apache.giraph.combiner.MinimumIntCombiner.java Source code

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Here is the source code for org.apache.giraph.combiner.MinimumIntCombiner.java

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/*
 * 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.giraph.combiner;

import org.apache.hadoop.io.IntWritable;

/**
 * {@link Combiner} that finds the minimum {@link IntWritable}
 */
public class MinimumIntCombiner extends Combiner<IntWritable, IntWritable> {
    @Override
    public void combine(IntWritable vertexIndex, IntWritable originalMessage, IntWritable messageToCombine) {
        if (originalMessage.get() > messageToCombine.get()) {
            originalMessage.set(messageToCombine.get());
        }
    }

    @Override
    public IntWritable createInitialMessage() {
        return new IntWritable(Integer.MAX_VALUE);
    }
}