TestCustomOutputCommitter.java
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上传日期:2018-01-08
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开发平台:
Java
- /* 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;
- import junit.framework.TestCase;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.*;
- import org.apache.hadoop.util.ToolRunner;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- public class TestCustomOutputCommitter extends TestCase {
- static final Path input = new Path("/test/input/");
- static final Path output = new Path("/test/output");
- public void testCommitter() throws Exception {
- MiniDFSCluster dfs = null;
- MiniMRCluster mr = null;
- FileSystem fs = null;
- Path testFile = new Path(input, "testfile");
- try {
- Configuration conf = new Configuration();
- //start the mini mr and dfs cluster.
- dfs = new MiniDFSCluster(conf, 2 , true, null);
- fs = dfs.getFileSystem();
- FSDataOutputStream stream = fs.create(testFile);
- stream.write("teststring".getBytes());
- stream.close();
- mr = new MiniMRCluster(2, fs.getUri().toString(), 1);
- String[] args = new String[6];
- args[0] = "-libjars";
- // the testjob.jar as a temporary jar file
- // holding custom output committer
- args[1] = "build/test/testjar/testjob.jar";
- args[2] = "-D";
- args[3] = "mapred.output.committer.class=testjar.CustomOutputCommitter";
- args[4] = input.toString();
- args[5] = output.toString();
- JobConf jobConf = mr.createJobConf();
- int ret = ToolRunner.run(jobConf, new WordCount(), args);
- assertTrue("not failed ", ret == 0);
- } finally {
- if (dfs != null) {dfs.shutdown();};
- if (mr != null) {mr.shutdown();};
- }
- }
- }