org.apache.xmlrpc.util
Class ThreadPool

java.lang.Object
  org.apache.xmlrpc.util.ThreadPool

public class ThreadPool
extends java.lang.Object

Simple thread pool. A task is executed by obtaining a thread from the pool

Nested Class Summary

static interface	ThreadPool.InterruptableTask A task, which may be interrupted, if the pool is shutting down.
private class	ThreadPool.Poolable
static interface	ThreadPool.Task The thread pool contains instances of ThreadPool.Task.

Field Summary

private int	maxSize
private int	num
private java.util.List	runningThreads
private java.lang.ThreadGroup	threadGroup
private java.util.List	waitingTasks
private java.util.List	waitingThreads

Constructor Summary

ThreadPool(int pMaxSize, java.lang.String pName)
Creates a new instance.

Method Summary

boolean	addTask(ThreadPool.Task pTask) Adds a task for immediate or deferred execution.
(package private) void	discard(ThreadPool.Poolable pPoolable)
int	getMaxThreads() Returns the maximum number of concurrent threads.
int	getNumThreads() Returns the number of threads, which have actually been created, as opposed to the number of currently running threads.
(package private) void	repool(ThreadPool.Poolable pPoolable)
void	shutdown() Closes the pool.
boolean	startTask(ThreadPool.Task pTask) Starts a task immediately.

Methods inherited from class java.lang.Object

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

Field Detail

threadGroup

private final java.lang.ThreadGroup threadGroup

maxSize

private final int maxSize

waitingThreads

private final java.util.List waitingThreads

runningThreads

private final java.util.List runningThreads

waitingTasks

private final java.util.List waitingTasks

num

private int num

Constructor Detail

ThreadPool

public ThreadPool(int pMaxSize,
                  java.lang.String pName)

Creates a new instance.

Parameters:

pMaxSize - Maximum number of concurrent threads.

pName - Thread group name.

Method Detail

discard

void discard(ThreadPool.Poolable pPoolable)

repool

void repool(ThreadPool.Poolable pPoolable)

startTask

public boolean startTask(ThreadPool.Task pTask)

Starts a task immediately.

Parameters:

pTask - The task being started.

Returns:

True, if the task could be started immediately. False, if the maxmimum number of concurrent tasks was exceeded. If so, you might consider to use the addTask(Task) method instead.

addTask

public boolean addTask(ThreadPool.Task pTask)

Adds a task for immediate or deferred execution.

Parameters:

pTask - The task being added.

Returns:

True, if the task was started immediately. False, if the task will be executed later.

shutdown

public void shutdown()

Closes the pool.

getMaxThreads

public int getMaxThreads()

Returns the maximum number of concurrent threads.

Returns:

Maximum number of threads.

getNumThreads

public int getNumThreads()

Returns the number of threads, which have actually been created, as opposed to the number of currently running threads.