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 import org.apache.hadoop.classification.InterfaceAudience; 022 import org.apache.hadoop.classification.InterfaceStability; 023 import org.apache.hadoop.fs.FileSystem; 024 import org.apache.hadoop.mapred.JobConf; 025 import org.apache.hadoop.mapred.OutputFormat; 026 import org.apache.hadoop.mapred.RecordWriter; 027 import org.apache.hadoop.mapred.Reporter; 028 import org.apache.hadoop.util.Progressable; 029 030 /** 031 * Consume all outputs and put them in /dev/null. 032 * @deprecated Use 033 * {@link org.apache.hadoop.mapreduce.lib.output.NullOutputFormat} instead. 034 */ 035 @Deprecated 036 @InterfaceAudience.Public 037 @InterfaceStability.Stable 038 public class NullOutputFormat<K, V> implements OutputFormat<K, V> { 039 040 public RecordWriter<K, V> getRecordWriter(FileSystem ignored, JobConf job, 041 String name, Progressable progress) { 042 return new RecordWriter<K, V>(){ 043 public void write(K key, V value) { } 044 public void close(Reporter reporter) { } 045 }; 046 } 047 048 public void checkOutputSpecs(FileSystem ignored, JobConf job) { } 049 }