Package org.apache.hadoop.tools.fedbalance.procedure

Class BalanceJob<T extends BalanceProcedure>

java.lang.Object

org.apache.hadoop.tools.fedbalance.procedure.BalanceJob<T>

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public final class BalanceJob<T extends BalanceProcedure>
extends java.lang.Object
implements org.apache.hadoop.io.Writable

A Job is a state machine consists of many procedures. The procedures are executed as a chain. Each procedure needs to specify the next procedure. If there is no next procedure then the job is finished.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BalanceJob.Builder<T extends BalanceProcedure>

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)
void	execute()	Run the state machine.
java.lang.String	getDetailMessage()	Get the detail description of this job.
java.lang.Exception	getError()	Return the error exception during the job execution.
java.lang.String	getId()	Get the uid of the job.
int	hashCode()
boolean	isJobDone()	Return true if the job has finished.
void	readFields(java.io.DataInput in)
boolean	shouldRemoveAfterDone()	Whether this job should be removed after it's done.
java.lang.String	toString()
void	waitJobDone()	Wait until the job is done.
void	write(java.io.DataOutput out)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Method Detail

execute

public void execute()

Run the state machine.

getId

public java.lang.String getId()

Get the uid of the job.

shouldRemoveAfterDone

@VisibleForTesting
public boolean shouldRemoveAfterDone()

Whether this job should be removed after it's done.

isJobDone

public boolean isJobDone()

Return true if the job has finished.

waitJobDone

public void waitJobDone()
                 throws java.lang.InterruptedException

Wait until the job is done.

Throws:

java.lang.InterruptedException

getError

public java.lang.Exception getError()

Return the error exception during the job execution. This should be called after the job finishes.

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getDetailMessage

public java.lang.String getDetailMessage()

Get the detail description of this job.