org.apache.nutch.mapReduce
Class TaskTrackerStatus

java.lang.Object
  org.apache.nutch.mapReduce.TaskTrackerStatus

All Implemented Interfaces:

Writable

public class TaskTrackerStatus

extends Object

implements Writable

A TaskTrackerStatus is a MapReduce primitive. Keeps info on a TaskTracker. The JobTracker maintains a set of the most recent TaskTrackerStatus objects for each unique TaskTracker it knows about.

Author:

Mike Cafarella

Constructor Summary

TaskTrackerStatus()

TaskTrackerStatus(String trackerName, String host, int port, Vector taskReports)

Method Summary

String	getHost()
long	getLastSeen()
int	getPort()
String	getTrackerName()
void	readFields(DataInput in) Reads the fields of this object from in.
void	setLastSeen(long lastSeen)
Iterator	taskReports() All current tasks at the TaskTracker.
void	write(DataOutput out) Writes 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

TaskTrackerStatus

public TaskTrackerStatus()

TaskTrackerStatus

public TaskTrackerStatus(String trackerName,
                         String host,
                         int port,
                         Vector taskReports)

Method Detail

getTrackerName

public String getTrackerName()

getHost

public String getHost()

getPort

public int getPort()

taskReports

public Iterator taskReports()

All current tasks at the TaskTracker. Tasks are tracked by a TaskStatus object.

getLastSeen

public long getLastSeen()

setLastSeen

public void setLastSeen(long lastSeen)

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Writes the fields of this object to out.

Specified by:

write in interface Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Reads 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

Throws:

IOException