org.pentaho.reporting.engine.classic.core.util
Class Worker

java.lang.Object
  java.lang.Thread
      org.pentaho.reporting.engine.classic.core.util.Worker

All Implemented Interfaces:

Runnable

public final class Worker
extends 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

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

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 infinite idle timeout.

Worker(int sleeptime)
Creates a new worker.

Method Summary

void	finish() Kills the worker immediately.
Runnable	getWorkload() Returns the workload object.
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	setWorkload(Runnable r) Set the next workload for this worker.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, 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 infinite idle timeout.

Method Detail

setWorkload

public void setWorkload(Runnable r)

Set the next workload for this worker.

Parameters:

r - the next workload for the worker.

Throws:

IllegalStateException - if the worker is not idle.

getWorkload

public Runnable getWorkload()

Returns the workload object.

Returns:

the runnable executed by this worker thread.

finish

public void finish()

Kills the worker immediately. 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.

Specified by:

run in interface Runnable

Overrides:

run in class Thread

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.