org.gridbus.broker.scheduler
Class Scheduler

java.lang.Object
  org.gridbus.broker.scheduler.Scheduler

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

DataScheduler, DBScheduler

public abstract class Scheduler

extends java.lang.Object

implements java.lang.Runnable

This is the base scheduler class, and contains main methods for performing the scheduling/

Version:

2.0

Author:

Srikumar Venugopal (srikumar@cs.mu.oz.au)

Field Summary

static int

POLLTIME Interval for polling job status

Constructor Summary

Scheduler(GridbusFarmingEngine fe)
Constructor for the Scheduler

Method Summary

boolean	isClassValid() Returns if the current class is a valid one.
boolean	isFailed()
boolean	isFinished() Returns whether the scheduling is finished.
void	run() The run method enables the scheduler to run as a seperate thread, and calls the 'schedule()' method.
abstract void	schedule() Abstract method: schedule to be implemented by derived classes which implement various scheduling algorithms.
void	setFailed(boolean failed)
void	setFinished(boolean b) Sets the 'finished' state of the scheduler.
void	sort(java.util.Vector server_vect) Sorts the compute server list by cost

Methods inherited from class java.lang.Object

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

Field Detail

POLLTIME

public static final int POLLTIME

Interval for polling job status

See Also:

Constant Field Values

Constructor Detail

Scheduler

public Scheduler(GridbusFarmingEngine fe)

Constructor for the Scheduler

Parameters:

fe - - Farming Engine

Method Detail

sort

public void sort(java.util.Vector server_vect)

Sorts the compute server list by cost

Parameters:

server_vect -

run

public void run()

The run method enables the scheduler to run as a seperate thread, and calls the 'schedule()' method.

Specified by:

run in interface java.lang.Runnable

See Also:

Runnable.run()

isFailed

public boolean isFailed()

Returns:

Returns the failed.

setFailed

public void setFailed(boolean failed)

Parameters:

failed - The failed to set.

isClassValid

public boolean isClassValid()

Returns if the current class is a valid one. This is used to avoid class loader problems with Tomcat.

Returns:

boolean

schedule

public abstract void schedule()

Abstract method: schedule to be implemented by derived classes which implement various scheduling algorithms.

isFinished

public boolean isFinished()

Returns whether the scheduling is finished.

Returns:

boolean

setFinished

public void setFinished(boolean b)

Sets the 'finished' state of the scheduler.

Parameters:

b - - boolean