/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.mina.integration.spring;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import edu.emory.mathcs.backport.java.util.concurrent.BlockingQueue;
import edu.emory.mathcs.backport.java.util.concurrent.Executors;
import edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue;
import edu.emory.mathcs.backport.java.util.concurrent.RejectedExecutionHandler;
import edu.emory.mathcs.backport.java.util.concurrent.SynchronousQueue;
import edu.emory.mathcs.backport.java.util.concurrent.ThreadFactory;
import edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor;
import edu.emory.mathcs.backport.java.util.concurrent.TimeUnit;
/**
* Spring {@link FactoryBean} which enables the configuration of
* {@link ThreadPoolExecutor} instances using Spring. Most of this code
* has been copied from the <code>ThreadPoolTaskExecutor</code> class
* available in Spring 2.0.
*
* @author The Apache Directory Project (mina-dev@directory.apache.org)
* @version $Rev$, $Date$
*/
public class ThreadPoolExecutorFactoryBean extends AbstractFactoryBean
{
private int corePoolSize = 1;
private int maxPoolSize = Integer.MAX_VALUE;
private int keepAliveSeconds = 60;
private int queueCapacity = Integer.MAX_VALUE;
private ThreadFactory threadFactory = Executors.defaultThreadFactory();
private RejectedExecutionHandler rejectedExecutionHandler = new ThreadPoolExecutor.AbortPolicy();
/**
* Set the ThreadPoolExecutor's core pool size. Default is 1.
*/
public void setCorePoolSize( int corePoolSize )
{
this.corePoolSize = corePoolSize;
}
/**
* Set the ThreadPoolExecutor's maximum pool size. Default is
* <code>Integer.MAX_VALUE</code>.
*/
public void setMaxPoolSize( int maxPoolSize )
{
this.maxPoolSize = maxPoolSize;
}
/**
* Set the ThreadPoolExecutor's keep alive seconds. Default is 60.
*/
public void setKeepAliveSeconds( int keepAliveSeconds )
{
this.keepAliveSeconds = keepAliveSeconds;
}
/**
* Set the capacity for the ThreadPoolExecutor's BlockingQueue. Default is
* <code>Integer.MAX_VALUE</code>.
* <p>
* Any positive value will lead to a LinkedBlockingQueue instance; any other
* value will lead to a SynchronousQueue instance.
*
* @see LinkedBlockingQueue
* @see SynchronousQueue
*/
public void setQueueCapacity( int queueCapacity )
{
this.queueCapacity = queueCapacity;
}
/**
* Set the ThreadFactory to use for the ThreadPoolExecutor's thread pool.
* Default is the ThreadPoolExecutor's default thread factory.
*
* @see Executors#defaultThreadFactory()
*/
public void setThreadFactory( ThreadFactory threadFactory )
{
this.threadFactory = ( threadFactory != null ? threadFactory
: Executors.defaultThreadFactory() );
}
/**
* Set the RejectedExecutionHandler to use for the ThreadPoolExecutor.
* Default is the ThreadPoolExecutor's default abort policy.
*
* @see ThreadPoolExecutor.AbortPolicy
*/
public void setRejectedExecutionHandler(
RejectedExecutionHandler rejectedExecutionHandler )
{
this.rejectedExecutionHandler = ( rejectedExecutionHandler != null
? rejectedExecutionHandler
: new ThreadPoolExecutor.AbortPolicy() );
}
protected Object createInstance() throws Exception
{
BlockingQueue queue = null;
if( queueCapacity > 0 )
{
queue = new LinkedBlockingQueue( queueCapacity );
}
else
{
queue = new SynchronousQueue();
}
return new ThreadPoolExecutor(
corePoolSize, maxPoolSize, keepAliveSeconds, TimeUnit.SECONDS,
queue, threadFactory, rejectedExecutionHandler );
}
protected void destroyInstance( Object o ) throws Exception
{
ThreadPoolExecutor executor = ( ThreadPoolExecutor ) o;
executor.shutdown();
}
public Class getObjectType()
{
return ThreadPoolExecutor.class;
}
}