/*
* Copyright (c) 1998-2011 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.lang.annotation.Annotation;
import javax.enterprise.context.spi.Contextual;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.PassivationCapable;
import javax.inject.Singleton;
import com.caucho.config.inject.HandleAware;
import com.caucho.config.inject.SingletonHandle;
import com.caucho.inject.Module;
import com.caucho.loader.Environment;
import com.caucho.loader.EnvironmentClassLoader;
/**
* The application scope value
*/
@Module
public class SingletonScope extends AbstractScopeContext {
private ContextContainer _context = new ContextContainer();
/**
* Returns the current application scope
*/
public SingletonScope()
{
Environment.addCloseListener(_context);
}
/**
* Returns true if the scope is currently active.
*/
@Override
public boolean isActive()
{
return true;
}
/**
* Returns the scope annotation type.
*/
@Override
public Class<? extends Annotation> getScope()
{
return Singleton.class;
}
@Override
protected ContextContainer getContextContainer()
{
return _context;
}
@Override
protected ContextContainer createContextContainer()
{
return _context;
}
@Override
protected <T> T create(Contextual<T> bean,
CreationalContext<T> env)
{
T instance = super.create(bean, env);
if ((instance instanceof HandleAware)
&& (bean instanceof PassivationCapable)) {
HandleAware handleAware = (HandleAware) instance;
PassivationCapable passiveBean = (PassivationCapable) bean;
handleAware.setSerializationHandle(new SingletonHandle(passiveBean.getId()));
}
return instance;
}
public <T> void addDestructor(Contextual<T> comp, T value)
{
EnvironmentClassLoader loader = Environment.getEnvironmentClassLoader();
if (loader != null) {
DestructionListener listener
= (DestructionListener) loader.getAttribute("caucho.destroy");
if (listener == null) {
listener = new DestructionListener();
loader.setAttribute("caucho.destroy", listener);
loader.addListener(listener);
}
listener.addValue(comp, value);
}
}
}