org.gridbus.broker.farming.common
Class JobQueue

java.lang.Object
  org.gridbus.broker.farming.common.JobQueue

public class JobQueue

extends java.lang.Object

This class implements a job queue for each compute server. The queue also has listeners associated with it. So when a job is added to the queue, the listeners are notified so that they can take action

Author:

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

Constructor Summary

JobQueue()
Constructor

Method Summary

void	addJob(Job j) Adds a job to the queue and notifies any listener that is registered with this queue
void	addListener(JobQueueListener jql) Adds/registers a listener to the job queue.
Job	getJob() Gets the job at the head of the job queue and removes it from the job queue Throws an exception if queue empty
void	removeListener(JobQueueListener jql) Removes/ deregisters the listener from the queue

Methods inherited from class java.lang.Object

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

Constructor Detail

JobQueue

public JobQueue()

Constructor

Method Detail

addJob

public void addJob(Job j)

Adds a job to the queue and notifies any listener that is registered with this queue

Parameters:

j - - the job to be added to the queue.

addListener

public void addListener(JobQueueListener jql)

Adds/registers a listener to the job queue.

Parameters:

jql -

removeListener

public void removeListener(JobQueueListener jql)
                    throws java.lang.Exception

Removes/ deregisters the listener from the queue

Parameters:

jql -

Throws:

java.lang.Exception

getJob

public Job getJob()
           throws java.lang.Exception

Gets the job at the head of the job queue and removes it from the job queue Throws an exception if queue empty

Returns:

Job

Throws:

java.lang.Exception