NullOutputFormat.java
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上传日期:2018-01-08
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- /**
- * 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.fs.FileSystem;
- import org.apache.hadoop.mapred.JobConf;
- import org.apache.hadoop.mapred.OutputFormat;
- import org.apache.hadoop.mapred.RecordWriter;
- import org.apache.hadoop.mapred.Reporter;
- import org.apache.hadoop.util.Progressable;
- /**
- * Consume all outputs and put them in /dev/null.
- * @deprecated Use
- * {@link org.apache.hadoop.mapreduce.lib.output.NullOutputFormat} instead.
- */
- @Deprecated
- public class NullOutputFormat<K, V> implements OutputFormat<K, V> {
-
- public RecordWriter<K, V> getRecordWriter(FileSystem ignored, JobConf job,
- String name, Progressable progress) {
- return new RecordWriter<K, V>(){
- public void write(K key, V value) { }
- public void close(Reporter reporter) { }
- };
- }
-
- public void checkOutputSpecs(FileSystem ignored, JobConf job) { }
- }