/**
* 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.jobcontrol;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.HadoopTestCase;
import org.apache.hadoop.mapred.JobConf;
/**
* HadoopTestCase that tests the local job runner.
*/
public class TestLocalJobControl extends HadoopTestCase {
public static final Log LOG = LogFactory.getLog(TestLocalJobControl.class
.getName());
/**
* Initialises a new instance of this test case to use a Local MR cluster and
* a local filesystem.
*
* @throws IOException If an error occurs initialising this object.
*/
public TestLocalJobControl() throws IOException {
super(HadoopTestCase.LOCAL_MR, HadoopTestCase.LOCAL_FS, 2, 2);
}
/**
* This is a main function for testing JobControl class. It first cleans all
* the dirs it will use. Then it generates some random text data in
* TestJobControlData/indir. Then it creates 4 jobs: Job 1: copy data from
* indir to outdir_1 Job 2: copy data from indir to outdir_2 Job 3: copy data
* from outdir_1 and outdir_2 to outdir_3 Job 4: copy data from outdir to
* outdir_4 The jobs 1 and 2 have no dependency. The job 3 depends on jobs 1
* and 2. The job 4 depends on job 3.
*
* Then it creates a JobControl object and add the 4 jobs to the JobControl
* object. Finally, it creates a thread to run the JobControl object and
* monitors/reports the job states.
*/
public void testLocalJobControlDataCopy() throws Exception {
FileSystem fs = FileSystem.get(createJobConf());
Path rootDataDir = new Path(System.getProperty("test.build.data", "."),
"TestLocalJobControlData");
Path indir = new Path(rootDataDir, "indir");
Path outdir_1 = new Path(rootDataDir, "outdir_1");
Path outdir_2 = new Path(rootDataDir, "outdir_2");
Path outdir_3 = new Path(rootDataDir, "outdir_3");
Path outdir_4 = new Path(rootDataDir, "outdir_4");
JobControlTestUtils.cleanData(fs, indir);
JobControlTestUtils.generateData(fs, indir);
JobControlTestUtils.cleanData(fs, outdir_1);
JobControlTestUtils.cleanData(fs, outdir_2);
JobControlTestUtils.cleanData(fs, outdir_3);
JobControlTestUtils.cleanData(fs, outdir_4);
ArrayList<Job> dependingJobs = null;
ArrayList<Path> inPaths_1 = new ArrayList<Path>();
inPaths_1.add(indir);
JobConf jobConf_1 = JobControlTestUtils.createCopyJob(inPaths_1, outdir_1);
Job job_1 = new Job(jobConf_1, dependingJobs);
ArrayList<Path> inPaths_2 = new ArrayList<Path>();
inPaths_2.add(indir);
JobConf jobConf_2 = JobControlTestUtils.createCopyJob(inPaths_2, outdir_2);
Job job_2 = new Job(jobConf_2, dependingJobs);
ArrayList<Path> inPaths_3 = new ArrayList<Path>();
inPaths_3.add(outdir_1);
inPaths_3.add(outdir_2);
JobConf jobConf_3 = JobControlTestUtils.createCopyJob(inPaths_3, outdir_3);
dependingJobs = new ArrayList<Job>();
dependingJobs.add(job_1);
dependingJobs.add(job_2);
Job job_3 = new Job(jobConf_3, dependingJobs);
ArrayList<Path> inPaths_4 = new ArrayList<Path>();
inPaths_4.add(outdir_3);
JobConf jobConf_4 = JobControlTestUtils.createCopyJob(inPaths_4, outdir_4);
dependingJobs = new ArrayList<Job>();
dependingJobs.add(job_3);
Job job_4 = new Job(jobConf_4, dependingJobs);
JobControl theControl = new JobControl("Test");
theControl.addJob(job_1);
theControl.addJob(job_2);
theControl.addJob(job_3);
theControl.addJob(job_4);
Thread theController = new Thread(theControl);
theController.start();
while (!theControl.allFinished()) {
LOG.debug("Jobs in waiting state: " + theControl.getWaitingJobs().size());
LOG.debug("Jobs in ready state: " + theControl.getReadyJobs().size());
LOG.debug("Jobs in running state: " + theControl.getRunningJobs().size());
LOG.debug("Jobs in success state: "
+ theControl.getSuccessfulJobs().size());
LOG.debug("Jobs in failed state: " + theControl.getFailedJobs().size());
LOG.debug("\n");
try {
Thread.sleep(5000);
} catch (Exception e) {
}
}
assertEquals("Some jobs failed", 0, theControl.getFailedJobs().size());
theControl.stop();
}
}