/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.config.scope;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import javax.enterprise.context.spi.Contextual;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import com.caucho.inject.Module;
import com.caucho.loader.ClassLoaderListener;
import com.caucho.loader.DynamicClassLoader;
/**
* Contains the objects which need destruction for a given scope.
*/
@SuppressWarnings("serial")
@Module
public class DestructionListener
implements ScopeRemoveListener,
HttpSessionBindingListener,
ClassLoaderListener,
Serializable {
private transient ArrayList<Contextual<?>> _beanList
= new ArrayList<Contextual<?>>();
private transient ArrayList<WeakReference<Object>> _valueList
= new ArrayList<WeakReference<Object>>();
public void addValue(Contextual<?> bean, Object value)
{
_beanList.add(bean);
_valueList.add(new WeakReference<Object>(value));
}
public void removeEvent(Object scope, String name)
{
close();
}
public void valueBound(HttpSessionBindingEvent event)
{
}
public void valueUnbound(HttpSessionBindingEvent event)
{
close();
}
public void classLoaderInit(DynamicClassLoader loader)
{
}
public void classLoaderDestroy(DynamicClassLoader loader)
{
close();
}
public void close()
{
ArrayList<Contextual<?>> beanList = _beanList;
_beanList = null;
ArrayList<WeakReference<Object>> valueList = _valueList;
_valueList = null;
if (valueList == null || beanList == null)
return;
for (int i = beanList.size() - 1; i >= 0; i--) {
Contextual bean = beanList.get(i);
WeakReference<Object> ref = valueList.get(i);
Object value = null;
if (ref != null) {
value = ref.get();
if (value != null)
bean.destroy(value, null);
}
}
}
}