| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.gridmix; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.hadoop.tools.rumen.JobStory; |
| import org.apache.hadoop.tools.rumen.JobStoryProducer; |
| import org.apache.hadoop.mapred.gridmix.Statistics.JobStats; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import java.io.IOException; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.locks.Condition; |
| |
| public class SerialJobFactory extends JobFactory<JobStats> { |
| |
| public static final Log LOG = LogFactory.getLog(SerialJobFactory.class); |
| private final Condition jobCompleted = lock.newCondition(); |
| |
| /** |
| * Creating a new instance does not start the thread. |
| * |
| * @param submitter Component to which deserialized jobs are passed |
| * @param jobProducer Job story producer |
| * {@link org.apache.hadoop.tools.rumen.ZombieJobProducer} |
| * @param scratch Directory into which to write output from simulated jobs |
| * @param conf Config passed to all jobs to be submitted |
| * @param startFlag Latch released from main to start pipeline |
| * @throws java.io.IOException |
| */ |
| public SerialJobFactory( |
| JobSubmitter submitter, JobStoryProducer jobProducer, Path scratch, |
| Configuration conf, CountDownLatch startFlag, UserResolver resolver) |
| throws IOException { |
| super(submitter, jobProducer, scratch, conf, startFlag, resolver); |
| } |
| |
| @Override |
| public Thread createReaderThread() { |
| return new SerialReaderThread("SerialJobFactory"); |
| } |
| |
| private class SerialReaderThread extends Thread { |
| |
| public SerialReaderThread(String threadName) { |
| super(threadName); |
| } |
| |
| /** |
| * SERIAL : In this scenario . method waits on notification , |
| * that a submitted job is actually completed. Logic is simple. |
| * === |
| * while(true) { |
| * wait till previousjob is completed. |
| * break; |
| * } |
| * submit newJob. |
| * previousJob = newJob; |
| * == |
| */ |
| @Override |
| public void run() { |
| try { |
| startFlag.await(); |
| if (Thread.currentThread().isInterrupted()) { |
| return; |
| } |
| LOG.info("START SERIAL @ " + System.currentTimeMillis()); |
| GridmixJob prevJob; |
| while (!Thread.currentThread().isInterrupted()) { |
| final JobStory job; |
| try { |
| job = getNextJobFiltered(); |
| if (null == job) { |
| return; |
| } |
| if (LOG.isDebugEnabled()) { |
| LOG.debug( |
| "Serial mode submitting job " + job.getName()); |
| } |
| prevJob = jobCreator.createGridmixJob( |
| conf, 0L, job, scratch, |
| userResolver.getTargetUgi( |
| UserGroupInformation.createRemoteUser(job.getUser())), |
| sequence.getAndIncrement()); |
| |
| lock.lock(); |
| try { |
| LOG.info(" Submitted the job " + prevJob); |
| submitter.add(prevJob); |
| } finally { |
| lock.unlock(); |
| } |
| } catch (IOException e) { |
| error = e; |
| //If submission of current job fails , try to submit the next job. |
| return; |
| } |
| |
| if (prevJob != null) { |
| //Wait till previous job submitted is completed. |
| lock.lock(); |
| try { |
| while (true) { |
| try { |
| jobCompleted.await(); |
| } catch (InterruptedException ie) { |
| LOG.error( |
| " Error in SerialJobFactory while waiting for job completion ", |
| ie); |
| return; |
| } |
| if (LOG.isDebugEnabled()) { |
| LOG.debug(" job " + job.getName() + " completed "); |
| } |
| break; |
| } |
| } finally { |
| lock.unlock(); |
| } |
| prevJob = null; |
| } |
| } |
| } catch (InterruptedException e) { |
| return; |
| } finally { |
| IOUtils.cleanup(null, jobProducer); |
| } |
| } |
| |
| } |
| |
| /** |
| * SERIAL. Once you get notification from StatsCollector about the job |
| * completion ,simply notify the waiting thread. |
| * |
| * @param item |
| */ |
| @Override |
| public void update(Statistics.JobStats item) { |
| //simply notify in case of serial submissions. We are just bothered |
| //if submitted job is completed or not. |
| lock.lock(); |
| try { |
| jobCompleted.signalAll(); |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| /** |
| * Start the reader thread, wait for latch if necessary. |
| */ |
| @Override |
| public void start() { |
| LOG.info(" Starting Serial submission "); |
| this.rThread.start(); |
| } |
| // it is need for test |
| void setDistCacheEmulator(DistributedCacheEmulator e) { |
| jobCreator.setDistCacheEmulator(e); |
| } |
| } |