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 }