org.jfree.report.util
Class WorkerPool

java.lang.Object
  org.jfree.report.util.WorkerPool

public class WorkerPool
extends java.lang.Object

A simple static workpool. Worker threads are created when necessary.

Author:

Thomas Morgner

Constructor Summary

WorkerPool()
Creates a new worker pool with the default size of 10 workers and the default name.

WorkerPool(int size)
Creates a new workerpool with the given number of workers and the default name.

WorkerPool(int size, java.lang.String namePrefix)
Creates a new worker pool for the given number of workers and with the given name prefix.

Method Summary

void	finishAll() Finishes all worker of this pool.
WorkerHandle	getWorkerForWorkload(java.lang.Runnable r) Returns a workerhandle for the given workload.
boolean	isWorkerAvailable() Checks, whether workers are available.
void	workerAvailable(Worker worker) Marks the given worker as available.
void	workerFinished(Worker worker) Marks the given worker as finished.

Methods inherited from class java.lang.Object

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

Constructor Detail

WorkerPool

public WorkerPool()

Creates a new worker pool with the default size of 10 workers and the default name.

WorkerPool

public WorkerPool(int size)

Creates a new workerpool with the given number of workers and the default name.

Parameters:

size - the maximum number of workers available.

WorkerPool

public WorkerPool(int size,
                  java.lang.String namePrefix)

Creates a new worker pool for the given number of workers and with the given name prefix.

Parameters:

size - the size of the worker pool.

namePrefix - the name prefix for all created workers.

Method Detail

isWorkerAvailable

public boolean isWorkerAvailable()

Checks, whether workers are available.

Returns:

true, if at least one worker is idle, false otherwise.

getWorkerForWorkload

public WorkerHandle getWorkerForWorkload(java.lang.Runnable r)

Returns a workerhandle for the given workload. This method will wait until an idle worker is found.

Parameters:

r - the workload for the worker

Returns:

a handle to the worker.

workerFinished

public void workerFinished(Worker worker)

Marks the given worker as finished. The worker will be removed from the list of the available workers.

Parameters:

worker - the worker which was finished.

workerAvailable

public void workerAvailable(Worker worker)

Marks the given worker as available.

Parameters:

worker - the worker which was available.

finishAll

public void finishAll()

Finishes all worker of this pool.