/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
must not be used to endorse or promote products derived from this software
without prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.excalibur.event.command;
import java.util.Iterator;
import org.apache.commons.collections.StaticBucketMap;
import org.apache.excalibur.event.EventHandler;
import org.apache.excalibur.event.Source;
/**
* This is a <code>ThreadManager</code> which provides a threadpool per
* <code>Sink</code> per <code>EventPipeline</code>. ::NOTE:: This is not
* implemented yet!
*
* @author <a href="mailto:bloritsch@apache.org">Berin Loritsch</a>
*/
public final class TPSPThreadManager implements Runnable, ThreadManager
{
private final StaticBucketMap m_pipelines = new StaticBucketMap();
private volatile boolean m_done = false;
private final long m_sleepTime;
private int m_threadsPerPool = 2;
/**
* The default constructor assumes there is a system property named
* "os.arch.cpus" that has a default for the number of CPUs on a system.
* Otherwise, the value is 1.
*
* @throws Exception if there is any problems creating the ThreadManager
*/
public TPSPThreadManager()
throws Exception
{
this( 2, 1000 );
}
/**
* Constructor provides a specified number of threads per processor. If
* either value is less then one, then the value is rewritten as one.
*
* @param maxThreadPerPool The number of processors in the machine
* @param sleepTime The number of milliseconds to wait between cycles
*
* @throws Exception when there is a problem creating the ThreadManager
*/
public TPSPThreadManager( int maxThreadPerPool, long sleepTime )
throws Exception
{
m_threadsPerPool = maxThreadPerPool;
m_sleepTime = sleepTime;
Thread runner = new Thread(this);
runner.setDaemon(true);
runner.start();
}
/**
* Register an EventPipeline with the ThreadManager.
*
* @param pipeline The pipeline we are registering
*/
public void register( EventPipeline pipeline )
{
m_pipelines.put( pipeline, new PipelineRunner( pipeline ) );
if( m_done )
{
Thread runner = new Thread(this);
runner.setDaemon(true);
runner.start();
}
}
/**
* Deregister an EventPipeline with the ThreadManager
*
* @param pipeline The pipeline to unregister
*/
public void deregister( EventPipeline pipeline )
{
m_pipelines.remove( pipeline );
if( m_pipelines.isEmpty() )
{
m_done = true;
}
}
/**
* Deregisters all EventPipelines from this ThreadManager
*/
public void deregisterAll()
{
m_done = true;
m_pipelines.clear();
}
public void run()
{
while( !m_done )
{
Iterator i = m_pipelines.values().iterator();
while( i.hasNext() )
{
Thread runner = new Thread( (PipelineRunner)i.next() );
runner.setDaemon(true);
runner.start();
}
if (! m_done)
{
try
{
Thread.sleep( m_sleepTime );
}
catch( InterruptedException ie )
{
// ignore and continue processing
}
}
}
}
/**
* The PipelineRunner will run the pipelines
*/
public static final class PipelineRunner implements Runnable
{
private final EventPipeline m_pipeline;
/**
* Create a PipelineRunner
*
* @param pipeline The pipeline we are wrapping
*/
protected PipelineRunner( EventPipeline pipeline )
{
m_pipeline = pipeline;
}
public void run()
{
Source[] sources = m_pipeline.getSources();
EventHandler handler = m_pipeline.getEventHandler();
for( int i = 0; i < sources.length; i++ )
{
handler.handleEvents( sources[ i ].dequeueAll() );
}
}
}
}