org.jfree.report.util
Class Worker

java.lang.Object
  java.lang.Thread
      org.jfree.report.util.Worker

All Implemented Interfaces:

java.lang.Runnable

public class Worker

extends java.lang.Thread

A simple worker implementation. The worker executes a assigned workload and then sleeps until another workload is set or the worker is killed.

Author:

Thomas Morgner

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Worker()
Creates a new worker with an default idle timeout of 2 minutes.

Worker(int sleeptime)
Creates a new worker.

Method Summary

void	finish() Kills the worker after he completed his work.
WorkerPool	getWorkerPool() Returns the worker's assigned pool.
boolean	isAvailable() Checks, whether this worker has some work to do.
boolean	isFinish() Checks whether this worker has received the signal to finish and die.
void	run() If a workload is set, process it.
void	setWorkerPool(WorkerPool workerPool) Defines the worker's assigned pool.
void	setWorkload(java.lang.Runnable r) Set the next workload for this worker.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

Worker

public Worker(int sleeptime)

Creates a new worker.

Parameters:

sleeptime - the time this worker sleeps until he checks for new work.

Worker

public Worker()

Creates a new worker with an default idle timeout of 2 minutes.

Method Detail

setWorkload

public void setWorkload(java.lang.Runnable r)

Set the next workload for this worker.

Parameters:

r - the next workload for the worker.

Throws:

java.lang.IllegalStateException - if the worker is not idle.

finish

public void finish()

Kills the worker after he completed his work. Awakens the worker if he's sleeping, so that the worker dies without delay.

isAvailable

public boolean isAvailable()

Checks, whether this worker has some work to do.

Returns:

true, if this worker has no more work and is currently sleeping.

run

public void run()

If a workload is set, process it. After the workload is processed, this worker starts to sleep until a new workload is set for the worker or the worker got the finish() request.

isFinish

public boolean isFinish()

Checks whether this worker has received the signal to finish and die.

Returns:

true, if the worker should finish the work and end the thread.

getWorkerPool

public WorkerPool getWorkerPool()

Returns the worker's assigned pool.

Returns:

the worker pool (or null, if the worker is not assigned to a pool).

setWorkerPool

public void setWorkerPool(WorkerPool workerPool)

Defines the worker's assigned pool.

Parameters:

workerPool - the worker pool (or null, if the worker is not assigned to a pool).