001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.mapred.lib;
020    
021    
022    import org.apache.hadoop.classification.InterfaceAudience;
023    import org.apache.hadoop.classification.InterfaceStability;
024    import org.apache.hadoop.io.WritableComparable;
025    import org.apache.hadoop.fs.Path;
026    import org.apache.hadoop.mapred.JobConf;
027    import org.apache.hadoop.mapred.Partitioner;
028    
029    /**
030     * Partitioner effecting a total order by reading split points from
031     * an externally generated source.
032     */
033    @InterfaceAudience.Public
034    @InterfaceStability.Stable
035    public class TotalOrderPartitioner<K extends WritableComparable<?>,V>
036        extends org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner<K, V>
037        implements Partitioner<K,V> {
038    
039      public TotalOrderPartitioner() { }
040    
041      public void configure(JobConf job) {
042        super.setConf(job);
043      }
044    
045      /**
046       * Set the path to the SequenceFile storing the sorted partition keyset.
047       * It must be the case that for <tt>R</tt> reduces, there are <tt>R-1</tt>
048       * keys in the SequenceFile.
049       * @deprecated Use 
050       * {@link #setPartitionFile(Configuration, Path)}
051       * instead
052       */
053      @Deprecated
054      public static void setPartitionFile(JobConf job, Path p) {
055        org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.
056                setPartitionFile(job, p);
057      }
058    
059      /**
060       * Get the path to the SequenceFile storing the sorted partition keyset.
061       * @see #setPartitionFile(JobConf,Path)
062       * @deprecated Use 
063       * {@link #getPartitionFile(Configuration)}
064       * instead
065       */
066      @Deprecated
067      public static String getPartitionFile(JobConf job) {
068        return org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.
069                getPartitionFile(job);
070      }
071    }