| /** |
| * 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.contrib.index.mapred; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.FileOutputFormat; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.RecordWriter; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.util.Progressable; |
| |
| /** |
| * The record writer of this output format simply puts a message in an output |
| * path when a shard update is done. |
| */ |
| public class IndexUpdateOutputFormat extends FileOutputFormat<Shard, Text> { |
| |
| /* (non-Javadoc) |
| * @see FileOutputFormat#getRecordWriter(FileSystem, JobConf, String, Progressable) |
| */ |
| public RecordWriter<Shard, Text> getRecordWriter(final FileSystem fs, |
| JobConf job, String name, final Progressable progress) |
| throws IOException { |
| |
| final Path perm = new Path(getWorkOutputPath(job), name); |
| |
| return new RecordWriter<Shard, Text>() { |
| public void write(Shard key, Text value) throws IOException { |
| assert (IndexUpdateReducer.DONE.equals(value)); |
| |
| String shardName = key.getDirectory(); |
| shardName = shardName.replace("/", "_"); |
| |
| Path doneFile = |
| new Path(perm, IndexUpdateReducer.DONE + "_" + shardName); |
| if (!fs.exists(doneFile)) { |
| fs.createNewFile(doneFile); |
| } |
| } |
| |
| public void close(final Reporter reporter) throws IOException { |
| } |
| }; |
| } |
| } |