org.apache.hadoop.mapreduce.v2.app.job.impl
Class JobImpl.InitTransition

java.lang.Object
  org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl.InitTransition

All Implemented Interfaces:

org.apache.hadoop.yarn.state.MultipleArcTransition<JobImpl,JobEvent,JobStateInternal>

Enclosing class:

JobImpl

public static class JobImpl.InitTransition
extends Object
implements org.apache.hadoop.yarn.state.MultipleArcTransition<JobImpl,JobEvent,JobStateInternal>

Constructor Summary

JobImpl.InitTransition()

Method Summary

protected org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo[]	createSplits(JobImpl job, org.apache.hadoop.mapreduce.v2.api.records.JobId jobId)
protected void	setup(JobImpl job)
JobStateInternal	transition(JobImpl job, JobEvent event) Note that this transition method is called directly (and synchronously) by MRAppMaster's init() method (i.e., no RPC, no thread-switching; just plain sequential call within AM context), so we can trigger modifications in AM state from here (at least, if AM is written that way; MR version is).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JobImpl.InitTransition

public JobImpl.InitTransition()

Method Detail

transition

public JobStateInternal transition(JobImpl job,
                                   JobEvent event)

Note that this transition method is called directly (and synchronously) by MRAppMaster's init() method (i.e., no RPC, no thread-switching; just plain sequential call within AM context), so we can trigger modifications in AM state from here (at least, if AM is written that way; MR version is).

Specified by:

transition in interface org.apache.hadoop.yarn.state.MultipleArcTransition<JobImpl,JobEvent,JobStateInternal>

setup

protected void setup(JobImpl job)
              throws IOException

Throws:

IOException

createSplits

protected org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo[] createSplits(JobImpl job,
                                                                                      org.apache.hadoop.mapreduce.v2.api.records.JobId jobId)