    001/*
    002 * Copyright (c) 2007-2016 Concurrent, 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.tez.util;
    022
    023import cascading.tuple.Tuple;
    024import cascading.tuple.hadoop.util.HasherPartitioner;
    025import org.apache.hadoop.conf.Configuration;
    026
    027/** Class GroupingPartitioner is an implementation of {@link org.apache.hadoop.mapred.Partitioner}. */
    028public class TuplePartitioner extends HasherPartitioner implements org.apache.tez.runtime.library.api.Partitioner
    029  {
    030  public TuplePartitioner( Configuration configuration )
    031    {
    032    setConf( configuration );
    033    }
    034
    035  public int getPartition( Object key, Object value, int numReduceTasks )
    036    {
    037    return ( hashCode( (Tuple) key ) & Integer.MAX_VALUE ) % numReduceTasks;
    038    }
    039  }