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
019package org.apache.hadoop.mapred.lib;
020
021import java.io.IOException;
022
023import org.apache.hadoop.classification.InterfaceAudience;
024import org.apache.hadoop.classification.InterfaceStability;
025import org.apache.hadoop.fs.FileSystem;
026import org.apache.hadoop.mapred.JobConf;
027import org.apache.hadoop.mapred.RecordWriter;
028import org.apache.hadoop.mapred.SequenceFileOutputFormat;
029import org.apache.hadoop.util.Progressable;
030
031/**
032 * This class extends the MultipleOutputFormat, allowing to write the output data 
033 * to different output files in sequence file output format. 
034 */
035@InterfaceAudience.Public
036@InterfaceStability.Stable
037public class MultipleSequenceFileOutputFormat <K,V>
038extends MultipleOutputFormat<K, V> {
039
040    private SequenceFileOutputFormat<K,V> theSequenceFileOutputFormat = null;
041  
042  @Override
043  protected RecordWriter<K, V> getBaseRecordWriter(FileSystem fs,
044                                                   JobConf job,
045                                                   String name,
046                                                   Progressable arg3) 
047  throws IOException {
048    if (theSequenceFileOutputFormat == null) {
049      theSequenceFileOutputFormat = new SequenceFileOutputFormat<K,V>();
050    }
051    return theSequenceFileOutputFormat.getRecordWriter(fs, job, name, arg3);
052  }
053}