org.mortbay.thread.concurrent

Class ThreadPool

java.lang.Object

java.util.concurrent.AbstractExecutorService

java.util.concurrent.ThreadPoolExecutor

org.mortbay.thread.concurrent.ThreadPool

All Implemented Interfaces:

Executor, ExecutorService, org.mortbay.component.LifeCycle, org.mortbay.thread.ThreadPool

public class ThreadPool
extends ThreadPoolExecutor
implements org.mortbay.thread.ThreadPool, org.mortbay.component.LifeCycle

Jetty ThreadPool using java 5 ThreadPoolExecutor This class wraps a ThreadPoolExecutor with the ThreadPool and LifeCycle interfaces so that it may be used by the Jetty org.mortbay.jetty.Server

Author:

gregw

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ThreadPoolExecutor

ThreadPoolExecutor.AbortPolicy, ThreadPoolExecutor.CallerRunsPolicy, ThreadPoolExecutor.DiscardOldestPolicy, ThreadPoolExecutor.DiscardPolicy

Nested classes/interfaces inherited from interface org.mortbay.component.LifeCycle

org.mortbay.component.LifeCycle.Listener

Constructor Summary

Constructors

Constructor and Description
ThreadPool() Default constructor.
ThreadPool(int queueSize) Default constructor.
ThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit) Size constructor.
ThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue)
ThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, RejectedExecutionHandler handler)
ThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory)
ThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory, RejectedExecutionHandler handler)

Method Summary

Modifier and Type	Method and Description
void	addLifeCycleListener(org.mortbay.component.LifeCycle.Listener listener)
boolean	dispatch(Runnable job)
int	getIdleThreads()
int	getThreads()
boolean	isFailed()
boolean	isLowOnThreads()
boolean	isRunning()
boolean	isStarted()
boolean	isStarting()
boolean	isStopped()
boolean	isStopping()
void	join()
void	removeLifeCycleListener(org.mortbay.component.LifeCycle.Listener listener)
void	start()
void	stop()

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

afterExecute, allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, beforeExecute, execute, finalize, getActiveCount, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getQueue, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, remove, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory, shutdown, shutdownNow, terminated, toString

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny, newTaskFor, newTaskFor, submit, submit, submit

Methods inherited from class java.lang.Object

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

Constructor Detail

ThreadPool

public ThreadPool()

Default constructor. Core size is 32, max pool size is 256, pool thread timeout after 60 seconds and an unbounded LinkedBlockingQueue is used for the job queue;

ThreadPool

public ThreadPool(int queueSize)

Default constructor. Core size is 32, max pool size is 256, pool thread timeout after 60 seconds

Parameters:

queueSize - if -1, an unbounded LinkedBlockingQueue is used, if 0 then a SynchronousQueue is used, other a ArrayBlockingQueue of the given size is used.

ThreadPool

public ThreadPool(int corePoolSize,
                  int maximumPoolSize,
                  long keepAliveTime,
                  TimeUnit unit)

Size constructor. an unbounded LinkedBlockingQueue is used for the jobs queue;

ThreadPool

public ThreadPool(int corePoolSize,
                  int maximumPoolSize,
                  long keepAliveTime,
                  TimeUnit unit,
                  BlockingQueue<Runnable> workQueue)

ThreadPool

public ThreadPool(int corePoolSize,
                  int maximumPoolSize,
                  long keepAliveTime,
                  TimeUnit unit,
                  BlockingQueue<Runnable> workQueue,
                  RejectedExecutionHandler handler)

ThreadPool

public ThreadPool(int corePoolSize,
                  int maximumPoolSize,
                  long keepAliveTime,
                  TimeUnit unit,
                  BlockingQueue<Runnable> workQueue,
                  ThreadFactory threadFactory,
                  RejectedExecutionHandler handler)

ThreadPool

public ThreadPool(int corePoolSize,
                  int maximumPoolSize,
                  long keepAliveTime,
                  TimeUnit unit,
                  BlockingQueue<Runnable> workQueue,
                  ThreadFactory threadFactory)

Method Detail

dispatch

public boolean dispatch(Runnable job)

Specified by:

dispatch in interface org.mortbay.thread.ThreadPool

getIdleThreads

public int getIdleThreads()

Specified by:

getIdleThreads in interface org.mortbay.thread.ThreadPool

getThreads

public int getThreads()

Specified by:

getThreads in interface org.mortbay.thread.ThreadPool

isLowOnThreads

public boolean isLowOnThreads()

Specified by:

isLowOnThreads in interface org.mortbay.thread.ThreadPool

join

public void join()
          throws InterruptedException

Specified by:

join in interface org.mortbay.thread.ThreadPool

Throws:

InterruptedException

isFailed

public boolean isFailed()

Specified by:

isFailed in interface org.mortbay.component.LifeCycle

isRunning

public boolean isRunning()

Specified by:

isRunning in interface org.mortbay.component.LifeCycle

isStarted

public boolean isStarted()

Specified by:

isStarted in interface org.mortbay.component.LifeCycle

isStarting

public boolean isStarting()

Specified by:

isStarting in interface org.mortbay.component.LifeCycle

isStopped

public boolean isStopped()

Specified by:

isStopped in interface org.mortbay.component.LifeCycle

isStopping

public boolean isStopping()

Specified by:

isStopping in interface org.mortbay.component.LifeCycle

start

public void start()
           throws Exception

Specified by:

start in interface org.mortbay.component.LifeCycle

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface org.mortbay.component.LifeCycle

Throws:

Exception

addLifeCycleListener

public void addLifeCycleListener(org.mortbay.component.LifeCycle.Listener listener)

Specified by:

addLifeCycleListener in interface org.mortbay.component.LifeCycle

removeLifeCycleListener

public void removeLifeCycleListener(org.mortbay.component.LifeCycle.Listener listener)

Specified by:

removeLifeCycleListener in interface org.mortbay.component.LifeCycle