org.jfree.report.util

Class WorkerPool

public class WorkerPool extends 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, 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(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.

Constructor Detail

public WorkerPool()

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

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.

public WorkerPool(int size, 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.

public void finishAll()

Finishes all worker of this pool.

public WorkerHandle getWorkerForWorkload(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.

public boolean isWorkerAvailable()

Checks, whether workers are available.

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

public void workerAvailable(Worker worker)

Marks the given worker as available.

Parameters: worker the worker which was available.

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.