| /** |
| * 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; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.FileOutputFormat; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.JobContext; |
| import org.apache.hadoop.mapred.OutputCommitter; |
| import org.apache.hadoop.mapred.TaskAttemptContext; |
| |
| public class CustomOutputCommitter extends OutputCommitter { |
| |
| public static final String JOB_SETUP_FILE_NAME = "_job_setup"; |
| public static final String JOB_COMMIT_FILE_NAME = "_job_commit"; |
| public static final String JOB_ABORT_FILE_NAME = "_job_abort"; |
| public static final String TASK_SETUP_FILE_NAME = "_task_setup"; |
| public static final String TASK_ABORT_FILE_NAME = "_task_abort"; |
| public static final String TASK_COMMIT_FILE_NAME = "_task_commit"; |
| |
| @Override |
| public void setupJob(JobContext jobContext) throws IOException { |
| writeFile(jobContext.getJobConf(), JOB_SETUP_FILE_NAME); |
| } |
| |
| @Override |
| public void commitJob(JobContext jobContext) throws IOException { |
| super.commitJob(jobContext); |
| writeFile(jobContext.getJobConf(), JOB_COMMIT_FILE_NAME); |
| } |
| |
| @Override |
| public void abortJob(JobContext jobContext, int status) |
| throws IOException { |
| super.abortJob(jobContext, status); |
| writeFile(jobContext.getJobConf(), JOB_ABORT_FILE_NAME); |
| } |
| |
| @Override |
| public void setupTask(TaskAttemptContext taskContext) throws IOException { |
| writeFile(taskContext.getJobConf(), TASK_SETUP_FILE_NAME); |
| } |
| |
| @Override |
| public boolean needsTaskCommit(TaskAttemptContext taskContext) |
| throws IOException { |
| return true; |
| } |
| |
| @Override |
| public void commitTask(TaskAttemptContext taskContext) throws IOException { |
| writeFile(taskContext.getJobConf(), TASK_COMMIT_FILE_NAME); |
| } |
| |
| @Override |
| public void abortTask(TaskAttemptContext taskContext) throws IOException { |
| writeFile(taskContext.getJobConf(), TASK_ABORT_FILE_NAME); |
| } |
| |
| private void writeFile(JobConf conf , String filename) throws IOException { |
| System.out.println("writing file ----" + filename); |
| Path outputPath = FileOutputFormat.getOutputPath(conf); |
| FileSystem fs = outputPath.getFileSystem(conf); |
| fs.create(new Path(outputPath, filename)).close(); |
| } |
| } |