org.apache.mina.util
Class BaseThreadPool

java.lang.Object
  org.apache.mina.util.BaseThreadPool

All Implemented Interfaces:

ThreadPool

Direct Known Subclasses:

IoThreadPoolFilter, ProtocolThreadPoolFilter

public abstract class BaseThreadPool
extends Object
implements ThreadPool

A base implementation of Thread-pooling filters. This filter forwards events to its thread pool. This is an implementation of Leader/Followers thread pool by Douglas C. Schmidt et al.

Version:

$Rev: 332218 $, $Date: 2005-11-10 12:52:42 +0900 $

Author:

The Apache Directory Project (dev@directory.apache.org)

Nested Class Summary

protected static class

BaseThreadPool.SessionBuffer

Field Summary

static int	DEFAULT_KEEP_ALIVE_TIME Default keep-alive time of thread pool (1 min).
static int	DEFAULT_MAXIMUM_POOL_SIZE Default maximum size of thread pool (2G).

Constructor Summary

BaseThreadPool(String threadNamePrefix)
Creates a new instance with default thread pool settings.

Method Summary

protected BaseThreadPool.SessionBuffer	fetchSessionBuffer(Queue unfetchedSessionBuffers) Implement this method to fetch (or pop) a BaseThreadPool.SessionBuffer from the given unfetchedSessionBuffers.
protected void	fireEvent(Object nextFilter, Session session, EventType type, Object data)
int	getKeepAliveTime() Returns the keep-alive time until the thread suicides after it became idle (milliseconds unit).
int	getMaximumPoolSize() Returns the maximum size of the thread pool.
int	getPoolSize() Returns the number of threads in the thread pool.
String	getThreadNamePrefix()
protected abstract void	processEvent(Object nextFilter, Session session, EventType type, Object data) Implement this method to forward events to nextFilter.
void	setKeepAliveTime(int keepAliveTime) Sets the keep-alive time until the thread suicides after it became idle (milliseconds unit).
void	setMaximumPoolSize(int maximumPoolSize) Sets the maximum size of the thread pool.
void	start() Starts thread pool threads and starts forwarding events to them.
void	stop() Stops all thread pool threads.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAXIMUM_POOL_SIZE

public static final int DEFAULT_MAXIMUM_POOL_SIZE

Default maximum size of thread pool (2G).

See Also:

Constant Field Values

DEFAULT_KEEP_ALIVE_TIME

public static final int DEFAULT_KEEP_ALIVE_TIME

Default keep-alive time of thread pool (1 min).

See Also:

Constant Field Values

Constructor Detail

BaseThreadPool

public BaseThreadPool(String threadNamePrefix)

Creates a new instance with default thread pool settings. You'll have to invoke start() method to start threads actually.

Parameters:

threadNamePrefix - the prefix of the thread names this pool will create.

Method Detail

getThreadNamePrefix

public String getThreadNamePrefix()

getPoolSize

public int getPoolSize()

Description copied from interface: ThreadPool

Returns the number of threads in the thread pool.

Specified by:

getPoolSize in interface ThreadPool

getMaximumPoolSize

public int getMaximumPoolSize()

Description copied from interface: ThreadPool

Returns the maximum size of the thread pool.

Specified by:

getMaximumPoolSize in interface ThreadPool

getKeepAliveTime

public int getKeepAliveTime()

Description copied from interface: ThreadPool

Returns the keep-alive time until the thread suicides after it became idle (milliseconds unit).

Specified by:

getKeepAliveTime in interface ThreadPool

setMaximumPoolSize

public void setMaximumPoolSize(int maximumPoolSize)

Description copied from interface: ThreadPool

Sets the maximum size of the thread pool.

Specified by:

setMaximumPoolSize in interface ThreadPool

setKeepAliveTime

public void setKeepAliveTime(int keepAliveTime)

Description copied from interface: ThreadPool

Sets the keep-alive time until the thread suicides after it became idle (milliseconds unit).

Specified by:

setKeepAliveTime in interface ThreadPool

start

public void start()

Description copied from interface: ThreadPool

Starts thread pool threads and starts forwarding events to them.

Specified by:

start in interface ThreadPool

stop

public void stop()

Description copied from interface: ThreadPool

Stops all thread pool threads.

Specified by:

stop in interface ThreadPool

fireEvent

protected void fireEvent(Object nextFilter,
                         Session session,
                         EventType type,
                         Object data)

processEvent

protected abstract void processEvent(Object nextFilter,
                                     Session session,
                                     EventType type,
                                     Object data)

Implement this method to forward events to nextFilter.

fetchSessionBuffer

protected BaseThreadPool.SessionBuffer fetchSessionBuffer(Queue unfetchedSessionBuffers)

Implement this method to fetch (or pop) a BaseThreadPool.SessionBuffer from the given unfetchedSessionBuffers. The default implementation simply pops the buffer from it. You could prioritize the fetch order.

Returns:

A non-null BaseThreadPool.SessionBuffer