org.quartz.simpl
Class SimpleThreadPool

java.lang.Object
  org.quartz.simpl.SimpleThreadPool

All Implemented Interfaces:

ThreadPool

public class SimpleThreadPool

extends java.lang.Object

implements ThreadPool

This is class is a simple implementation of a thread pool, based on the ThreadPool interface.

Runnable objects are sent to the pool with the runInThread(Runnable) method, which blocks until a Thread becomes available.

The pool has a fixed number of Threads, and does not grow or shrink based on demand.

Author:

James House, Juergen Donnerstag

Constructor Summary

SimpleThreadPool()
Create a new (unconfigured) SimpleThreadPool.

SimpleThreadPool(int threadCount, int threadPriority)
Create a new SimpleThreadPool with the specified number of Threads that have the given priority.

Method Summary

org.apache.commons.logging.Log	getLog()
int	getPoolSize()
int	getThreadCount() Get the number of worker threads in the pool.
int	getThreadPriority() Get the thread priority of worker threads in the pool.
void	initialize() Called by the QuartzScheduler before the ThreadPool is used, in order to give the it a chance to initialize.
boolean	runInThread(java.lang.Runnable runnable) Run the given Runnable object in the next available Thread.
void	setThreadCount(int count) Set the number of worker threads in the pool - has no effect after initialize() has been called.
void	setThreadPriority(int prio) Set the thread priority of worker threads in the pool - has no effect after initialize() has been called.
void	shutdown() Terminate any worker threads in this thread group.
void	shutdown(boolean waitForJobsToComplete) Terminate any worker threads in this thread group.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleThreadPool

public SimpleThreadPool()

Create a new (unconfigured) SimpleThreadPool.

See Also:

setThreadCount(int), setThreadPriority(int)

SimpleThreadPool

public SimpleThreadPool(int threadCount,
                        int threadPriority)

Create a new SimpleThreadPool with the specified number of Threads that have the given priority.

Parameters:

threadCount - the number of worker Threads in the pool, must be > 0 and <= 200.

threadPriority - the thread priority for the worker threads.

See Also:

Thread

Method Detail

getLog

public org.apache.commons.logging.Log getLog()

getPoolSize

public int getPoolSize()

Specified by:

getPoolSize in interface ThreadPool

setThreadCount

public void setThreadCount(int count)

Set the number of worker threads in the pool - has no effect after initialize() has been called.

getThreadCount

public int getThreadCount()

Get the number of worker threads in the pool.

setThreadPriority

public void setThreadPriority(int prio)

Set the thread priority of worker threads in the pool - has no effect after initialize() has been called.

getThreadPriority

public int getThreadPriority()

Get the thread priority of worker threads in the pool.

initialize

public void initialize()
                throws SchedulerConfigException

Description copied from interface: ThreadPool

Called by the QuartzScheduler before the ThreadPool is used, in order to give the it a chance to initialize.

Specified by:

initialize in interface ThreadPool

Throws:

SchedulerConfigException

shutdown

public void shutdown()

Terminate any worker threads in this thread group.

Jobs currently in progress will complete.

shutdown

public void shutdown(boolean waitForJobsToComplete)

Terminate any worker threads in this thread group.

Jobs currently in progress will complete.

Specified by:

shutdown in interface ThreadPool

runInThread

public boolean runInThread(java.lang.Runnable runnable)

Run the given Runnable object in the next available Thread. If while waiting the thread pool is asked to shut down, the Runnable is executed immediately within a new additional thread.

Specified by:

runInThread in interface ThreadPool

Parameters:

runnable - the Runnable to be added.