org.gvsig.remoteclient.taskplanning.retrieving
Class RetrieveQueue

java.lang.Object
  org.gvsig.remoteclient.taskplanning.retrieving.RetrieveQueue

All Implemented Interfaces:

IQueue

public class RetrieveQueue
extends java.lang.Object
implements IQueue

Author:

jaume dominguez faus - jaume.dominguez@iver.es Luis W. Sevilla (sevilla_lui@gva.es)

Constructor Summary

RetrieveQueue(java.lang.String hName)

Method Summary

ITaskPlanner	getTaskPlanner() Returns the task planner currently defined by this queue.
java.util.Vector	getTasks() Returns the set of tasks in a Vector (thread-safe).
protected URLRetrieveTask	getURLPreviousRequest(URLRequest request)
boolean	isEmpty() Returns true if the Queue has no (more) jobs to do.
void	pause() Causes the execution of this queue to be paused.
IRunnableTask	put(IRunnableTask task) Adds a new task to the queue.
void	resume() Causes the execution of this queue to be resumed.
void	setTaskPlanner(ITaskPlanner planner) Sets the TaskPlanner that will decide which of the tasks in the queue will be executed next.
IRunnableTask	take() Returns the next task by calling the task planner's nextTask() method.

Methods inherited from class java.lang.Object

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

Constructor Detail

RetrieveQueue

public RetrieveQueue(java.lang.String hName)

Method Detail

put

public IRunnableTask put(IRunnableTask task)

Description copied from interface: IQueue

Adds a new task to the queue. The place where the new task will be put its left to the concrete implementation of this interface.

Specified by:

put in interface IQueue

take

public IRunnableTask take()

Description copied from interface: IQueue

Returns the next task by calling the task planner's nextTask() method.

Specified by:

take in interface IQueue

Returns:

IRunnableTask with the next task to be executed.

isEmpty

public boolean isEmpty()

Description copied from interface: IQueue

Returns true if the Queue has no (more) jobs to do.

Specified by:

isEmpty in interface IQueue

Returns:

getTaskPlanner

public ITaskPlanner getTaskPlanner()

Description copied from interface: IQueue

Returns the task planner currently defined by this queue.

Specified by:

getTaskPlanner in interface IQueue

Returns:

ITaskPlanner

setTaskPlanner

public void setTaskPlanner(ITaskPlanner planner)

Description copied from interface: IQueue

Sets the TaskPlanner that will decide which of the tasks in the queue will be executed next. A null value should represent a FIFO planner.

Specified by:

setTaskPlanner in interface IQueue

pause

public void pause()

Description copied from interface: IQueue

Causes the execution of this queue to be paused. The task currently in execution finishes and after it the planner will not issue more tasks until resume() is invoked.

Specified by:

pause in interface IQueue

resume

public void resume()

Description copied from interface: IQueue

Causes the execution of this queue to be resumed. The execution will continue with the next task issued by the planner. It has no effect if the queue was not paused yet.

Specified by:

resume in interface IQueue

getTasks

public java.util.Vector getTasks()

Description copied from interface: IQueue

Returns the set of tasks in a Vector (thread-safe).

Specified by:

getTasks in interface IQueue

Returns:

Vector containing the tasks in this queue.

getURLPreviousRequest

protected URLRetrieveTask getURLPreviousRequest(URLRequest request)