    001/*
    002 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.tuple.hadoop.util;
    022
    023import cascading.tuple.Tuple;
    024import cascading.tuple.io.TuplePair;
    025import org.apache.hadoop.mapred.JobConf;
    026import org.apache.hadoop.mapred.Partitioner;
    027
    028/** Class GroupingSortingPartitioner is an implementation of {@link Partitioner}. */
    029public class GroupingSortingPartitioner extends HasherPartitioner implements Partitioner<TuplePair, Tuple>
    030  {
    031  public int getPartition( TuplePair key, Tuple value, int numReduceTasks )
    032    {
    033    return ( hashCode( key.getLhs() ) & Integer.MAX_VALUE ) % numReduceTasks;
    034    }
    035
    036  @Override
    037  public void configure( JobConf job )
    038    {
    039    setConf( job );
    040    }
    041  }