org.apache.hadoop.mapred

Class MapTaskCompletionEventsUpdate

java.lang.Object

org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate

All Implemented Interfaces:

Writable

@InterfaceAudience.Private
@InterfaceStability.Unstable
public class MapTaskCompletionEventsUpdate
extends Object
implements Writable

A class that represents the communication between the tasktracker and child tasks w.r.t the map task completion events. It also indicates whether the child task should reset its events index.

Constructor Summary

Constructors

Constructor and Description
MapTaskCompletionEventsUpdate()
MapTaskCompletionEventsUpdate(TaskCompletionEvent[] events, boolean reset)

Method Summary

Methods

Modifier and Type	Method and Description
TaskCompletionEvent[]	getMapTaskCompletionEvents()
void	readFields(DataInput in) Deserialize the fields of this object from in.
boolean	shouldReset()
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapTaskCompletionEventsUpdate

public MapTaskCompletionEventsUpdate()

MapTaskCompletionEventsUpdate

public MapTaskCompletionEventsUpdate(TaskCompletionEvent[] events,
                             boolean reset)

Method Detail

shouldReset

public boolean shouldReset()

getMapTaskCompletionEvents

public TaskCompletionEvent[] getMapTaskCompletionEvents()

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException