hadoop TotalOrderPartitioner 源码
haddop TotalOrderPartitioner 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/TotalOrderPartitioner.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.mapred.lib;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Partitioner;
/**
* Partitioner effecting a total order by reading split points from
* an externally generated source.
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public class TotalOrderPartitioner<K ,V>
extends org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner<K, V>
implements Partitioner<K,V> {
public TotalOrderPartitioner() { }
public void configure(JobConf job) {
super.setConf(job);
}
/**
* Set the path to the SequenceFile storing the sorted partition keyset.
* It must be the case that for <tt>R</tt> reduces, there are <tt>R-1</tt>
* keys in the SequenceFile.
* @deprecated Use
* {@link #setPartitionFile(Configuration, Path)}
* instead
*/
@Deprecated
public static void setPartitionFile(JobConf job, Path p) {
org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.
setPartitionFile(job, p);
}
/**
* Get the path to the SequenceFile storing the sorted partition keyset.
* @see #setPartitionFile(JobConf,Path)
* @deprecated Use
* {@link #getPartitionFile(Configuration)}
* instead
*/
@Deprecated
public static String getPartitionFile(JobConf job) {
return org.apache.hadoop.mapreduce.lib.partition.TotalOrderPartitioner.
getPartitionFile(job);
}
}
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