Package 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 java.lang.Object
implements org.apache.hadoop.yarn.state.MultipleArcTransition<JobImpl,JobEvent,JobStateInternal>

Constructor Summary

Constructors

Constructor	Description
InitTransition()

Method Summary

Modifier and Type	Method	Description
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

InitTransition

public 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 java.io.IOException

Throws:

java.io.IOException

createSplits

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