libra.core.kmersimilarity_r.KmerSimilarityPartitioner.java Source code

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Here is the source code for libra.core.kmersimilarity_r.KmerSimilarityPartitioner.java

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/*
 * Copyright 2016 iychoi.
 *
 * 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 libra.core.kmersimilarity_r;

import libra.common.hadoop.io.datatypes.CompressedIntArrayWritable;
import libra.common.hadoop.io.datatypes.CompressedSequenceWritable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.mapreduce.Partitioner;

/**
 *
 * @author iychoi
 */
public class KmerSimilarityPartitioner extends Partitioner<CompressedSequenceWritable, CompressedIntArrayWritable> {

    private static final Log LOG = LogFactory.getLog(KmerSimilarityPartitioner.class);

    @Override
    public int getPartition(CompressedSequenceWritable key, CompressedIntArrayWritable value, int numReduceTasks) {
        return Math.abs(key.getSequence().hashCode()) % numReduceTasks;
    }
}