/**
* 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.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.tools.rumen.JobStory;
import org.apache.hadoop.tools.rumen.JobStoryProducer;
import org.apache.hadoop.tools.rumen.Pre21JobHistoryConstants;
import org.apache.hadoop.tools.rumen.ZombieCluster;
import org.apache.hadoop.tools.rumen.ZombieJob;
import org.apache.hadoop.tools.rumen.ZombieJobProducer;
/**
* This class creates {@link JobStory} objects from trace file in rumen format.
* It is a proxy class over {@link ZombieJobProducer}, and adjusts the
* submission time to be aligned with simulation time.
*/
public class SimulatorJobStoryProducer implements JobStoryProducer {
private final SortedZombieJobProducer producer;
private final long firstJobStartTime;
private long relativeTime = -1;
private boolean firstJob = true;
public SimulatorJobStoryProducer(Path path, ZombieCluster cluster,
long firstJobStartTime, Configuration conf) throws IOException {
producer = new SortedZombieJobProducer(path, cluster, conf, 1000);
this.firstJobStartTime = firstJobStartTime;
}
/**
* Filter some jobs being fed to the simulator. For now, we filter out killed
* jobs to facilitate debugging.
*
* @throws IOException
*/
private JobStory getNextJobFiltered() throws IOException {
while (true) {
ZombieJob job = producer.getNextJob();
if (job == null) {
return null;
}
if (job.getOutcome() == Pre21JobHistoryConstants.Values.KILLED) {
continue;
}
if (job.getNumberMaps() == 0) {
continue;
}
if (job.getNumLoggedMaps() == 0) {
continue;
}
return job;
}
}
@Override
public JobStory getNextJob() throws IOException {
JobStory job = getNextJobFiltered();
if (job == null)
return null;
if (firstJob) {
firstJob = false;
relativeTime = job.getSubmissionTime() - firstJobStartTime;
}
return new SimulatorJobStory(job, job.getSubmissionTime() - relativeTime);
}
@Override
public void close() throws IOException {
producer.close();
}
}