org.apache.hadoop.mapred
Class MapTaskCompletionEventsUpdate

java.lang.Object
  extended by org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate
All Implemented Interfaces:
Writable

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
MapTaskCompletionEventsUpdate()
           
MapTaskCompletionEventsUpdate(TaskCompletionEvent[] events, boolean reset)
           
 
Method Summary
 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


Copyright © 2009 The Apache Software Foundation