TestJobClient.java
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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;
- import java.io.BufferedReader;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.io.OutputStream;
- import java.io.OutputStreamWriter;
- import java.io.PipedInputStream;
- import java.io.PipedOutputStream;
- import java.io.PrintStream;
- import java.io.Writer;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.io.LongWritable;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.util.Tool;
- import org.apache.hadoop.util.ToolRunner;
- public class TestJobClient extends ClusterMapReduceTestCase {
-
- private static final Log LOG = LogFactory.getLog(TestJobClient.class);
-
- private String runJob() throws Exception {
- OutputStream os = getFileSystem().create(new Path(getInputDir(), "text.txt"));
- Writer wr = new OutputStreamWriter(os);
- wr.write("hello1n");
- wr.write("hello2n");
- wr.write("hello3n");
- wr.close();
- JobConf conf = createJobConf();
- conf.setJobName("mr");
- conf.setJobPriority(JobPriority.HIGH);
-
- conf.setInputFormat(TextInputFormat.class);
- conf.setMapOutputKeyClass(LongWritable.class);
- conf.setMapOutputValueClass(Text.class);
- conf.setOutputFormat(TextOutputFormat.class);
- conf.setOutputKeyClass(LongWritable.class);
- conf.setOutputValueClass(Text.class);
- conf.setMapperClass(org.apache.hadoop.mapred.lib.IdentityMapper.class);
- conf.setReducerClass(org.apache.hadoop.mapred.lib.IdentityReducer.class);
- FileInputFormat.setInputPaths(conf, getInputDir());
- FileOutputFormat.setOutputPath(conf, getOutputDir());
- return JobClient.runJob(conf).getID().toString();
- }
-
- private int runTool(Configuration conf, Tool tool, String[] args, OutputStream out) throws Exception {
- PrintStream oldOut = System.out;
- PrintStream newOut = new PrintStream(out, true);
- try {
- System.setOut(newOut);
- return ToolRunner.run(conf, tool, args);
- } finally {
- System.setOut(oldOut);
- }
- }
- public void testGetCounter() throws Exception {
- String jobId = runJob();
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- int exitCode = runTool(createJobConf(), new JobClient(),
- new String[] { "-counter", jobId,
- "org.apache.hadoop.mapred.Task$Counter", "MAP_INPUT_RECORDS" },
- out);
- assertEquals("Exit code", 0, exitCode);
- assertEquals("Counter", "3", out.toString().trim());
- }
- public void testJobList() throws Exception {
- String jobId = runJob();
- verifyJobPriority(jobId, "HIGH");
- }
- private void verifyJobPriority(String jobId, String priority)
- throws Exception {
- PipedInputStream pis = new PipedInputStream();
- PipedOutputStream pos = new PipedOutputStream(pis);
- int exitCode = runTool(createJobConf(), new JobClient(),
- new String[] { "-list", "all" },
- pos);
- assertEquals("Exit code", 0, exitCode);
- BufferedReader br = new BufferedReader(new InputStreamReader(pis));
- String line = null;
- while ((line=br.readLine()) != null) {
- LOG.info("line = " + line);
- if (!line.startsWith(jobId)) {
- continue;
- }
- assertTrue(line.contains(priority));
- break;
- }
- pis.close();
- }
-
- public void testChangingJobPriority() throws Exception {
- String jobId = runJob();
- int exitCode = runTool(createJobConf(), new JobClient(),
- new String[] { "-set-priority", jobId, "VERY_LOW" },
- new ByteArrayOutputStream());
- assertEquals("Exit code", 0, exitCode);
- verifyJobPriority(jobId, "VERY_LOW");
- }
- }