import org.apache.hadoop.mapreduce.v2.app.commit.CommitterJobSetupEvent; //导入依赖的package包/类
/**
 * This transition executes in the event-dispatcher thread, though it's
 * triggered in MRAppMaster's startJobs() method.
 */
@Override
public void transition(JobImpl job, JobEvent event) {
  JobStartEvent jse = (JobStartEvent) event;
  if (jse.getRecoveredJobStartTime() != 0) {
    job.startTime = jse.getRecoveredJobStartTime();
  } else {
    job.startTime = job.clock.getTime();
  }
  JobInitedEvent jie =
    new JobInitedEvent(job.oldJobId,
         job.startTime,
         job.numMapTasks, job.numReduceTasks,
         job.getState().toString(),
         job.isUber());
  job.eventHandler.handle(new JobHistoryEvent(job.jobId, jie));
  JobInfoChangeEvent jice = new JobInfoChangeEvent(job.oldJobId,
      job.appSubmitTime, job.startTime);
  job.eventHandler.handle(new JobHistoryEvent(job.jobId, jice));
  job.metrics.runningJob(job);

  job.eventHandler.handle(new CommitterJobSetupEvent(
          job.jobId, job.jobContext));
}
 

import org.apache.hadoop.mapreduce.v2.app.commit.CommitterJobSetupEvent; //导入依赖的package包/类
/**
 * This transition executes in the event-dispatcher thread, though it's
 * triggered in MRAppMaster's startJobs() method.
 */
@Override
public void transition(JobImpl job, JobEvent event) {
  JobStartEvent jse = (JobStartEvent) event;
  if (jse.getRecoveredJobStartTime() != -1L) {
    job.startTime = jse.getRecoveredJobStartTime();
  } else {
    job.startTime = job.clock.getTime();
  }
  JobInitedEvent jie =
    new JobInitedEvent(job.oldJobId,
         job.startTime,
         job.numMapTasks, job.numReduceTasks,
         job.getState().toString(),
         job.isUber());
  job.eventHandler.handle(new JobHistoryEvent(job.jobId, jie));
  JobInfoChangeEvent jice = new JobInfoChangeEvent(job.oldJobId,
      job.appSubmitTime, job.startTime);
  job.eventHandler.handle(new JobHistoryEvent(job.jobId, jice));
  job.metrics.runningJob(job);

  job.eventHandler.handle(new CommitterJobSetupEvent(
          job.jobId, job.jobContext));
}