/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb3.pool;
import org.jboss.ejb3.BeanContext;
import org.jboss.ejb3.Container;
import org.jboss.ejb3.InfinitePool;
import org.jboss.injection.Injector;
import org.jboss.lang.ref.WeakThreadLocal;
import org.jboss.logging.Logger;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Pools EJBs within a ThreadLocal.
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 107589 $
*/
public class ThreadlocalPool implements Pool
{
private static final Logger log = Logger.getLogger(ThreadlocalPool.class);
protected Pool pool = new InfinitePool();
protected WeakThreadLocal<BeanContext> currentBeanContext = new WeakThreadLocal<BeanContext>();
private AtomicInteger inUse = new AtomicInteger();
public ThreadlocalPool()
{
}
protected BeanContext create()
{
return pool.get();
}
protected BeanContext create(Class[] initTypes, Object[] initValues)
{
return pool.get(initTypes, initValues);
}
public void discard(BeanContext obj)
{
pool.discard(obj);
inUse.decrementAndGet();
}
public void destroy()
{
log.trace("destroying pool");
pool.destroy();
// This really serves little purpose, because we want the whole thread local map to die
currentBeanContext.remove();
inUse.getAndSet(0);
}
public BeanContext get()
{
BeanContext ctx = currentBeanContext.get();
if (ctx != null)
currentBeanContext.set(null);
else
ctx = create();
inUse.incrementAndGet();
return ctx;
}
public BeanContext get(Class[] initTypes, Object[] initValues)
{
BeanContext ctx = currentBeanContext.get();
if (ctx != null)
currentBeanContext.set(null);
else
ctx = create(initTypes, initValues);
inUse.incrementAndGet();
return ctx;
}
public void initialize(Container container, int maxSize, long timeout)
{
pool.initialize(container, maxSize, timeout);
}
public void release(BeanContext ctx)
{
if (currentBeanContext.get() != null)
remove(ctx);
else
currentBeanContext.set(ctx);
inUse.decrementAndGet();
}
public void remove(BeanContext ctx)
{
pool.remove(ctx);
}
public int getCurrentSize()
{
int size;
synchronized (pool)
{
size = pool.getCreateCount() - pool.getRemoveCount();
}
return size;
}
public int getAvailableCount()
{
return getMaxSize() - inUse.get();
}
public int getCreateCount()
{
return pool.getCreateCount();
}
public int getMaxSize()
{
// the thread local pool dynamically grows for new threads
// if a bean is reentrant it'll grow and shrink over the reentrant call
return getCurrentSize();
}
public int getRemoveCount()
{
return pool.getRemoveCount();
}
public void setInjectors(Injector[] injectors)
{
pool.setInjectors(injectors);
}
public void setMaxSize(int maxSize)
{
//this.maxSize = maxSize;
log.warn("EJBTHREE-1703: setting a max size on ThreadlocalPool is bogus");
}
}