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/*******************************************************************************
* Copyright (c) 2014 Raymond Augé and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Raymond Augé <raymond.auge@liferay.com> - Bug 436698
******************************************************************************/
package org.eclipse.equinox.http.servlet.internal.registration;
import java.lang.reflect.*;
import java.util.EventListener;
import java.util.List;
import javax.servlet.*;
import org.eclipse.equinox.http.servlet.internal.context.ContextController;
import org.osgi.service.http.context.ServletContextHelper;
import org.osgi.service.http.runtime.dto.ListenerDTO;
/**
* @author Raymond Augé
*/
public class ListenerRegistration extends Registration<EventListener, ListenerDTO> {
private final List<Class<? extends EventListener>> classes;
private final EventListener proxy;
private final ServletContext servletContext;
private final ServletContextHelper servletContextHelper; //The context used during the registration of the servlet
private final ContextController contextController;
private ClassLoader classLoader;
public ListenerRegistration(
EventListener eventListener, List<Class<? extends EventListener>> classes,
ListenerDTO listenerDTO, ServletContext servletContext,
ServletContextHelper servletContextHelper,
ContextController contextController) {
super(eventListener, listenerDTO);
this.classes = classes;
this.servletContext = servletContext;
this.servletContextHelper = servletContextHelper;
this.contextController = contextController;
classLoader = contextController.getClassLoader();
createContextAttributes();
proxy = (EventListener)Proxy.newProxyInstance(
classLoader, classes.toArray(new Class[0]),
new EventListenerInvocationHandler());
}
@Override
public synchronized void destroy() {
ClassLoader original = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(classLoader);
contextController.getListenerRegistrations().remove(this);
contextController.getEventListeners().remove(classes, this);
super.destroy();
if (classes.contains(ServletContextListener.class)) {
ServletContextListener servletContextListener =
(ServletContextListener)super.getT();
servletContextListener.contextDestroyed(
new ServletContextEvent(servletContext));
}
}
finally {
destroyContextAttributes();
Thread.currentThread().setContextClassLoader(original);
}
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ListenerRegistration)) {
return false;
}
ListenerRegistration listenerRegistration = (ListenerRegistration)obj;
return super.getT().equals(listenerRegistration.getT());
}
@Override
public int hashCode() {
return Long.valueOf(getD().serviceId).hashCode();
}
public ServletContext getServletContext() {
return servletContext;
}
public ServletContextHelper getServletContextHelper() {
return servletContextHelper;
}
@Override
public EventListener getT() {
return proxy;
}
private void createContextAttributes() {
contextController.getProxyContext().createContextAttributes(
servletContextHelper);
}
private void destroyContextAttributes() {
contextController.getProxyContext().destroyContextAttributes(
servletContextHelper);
}
private class EventListenerInvocationHandler implements InvocationHandler {
public EventListenerInvocationHandler() {
}
@Override
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
ClassLoader original = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(classLoader);
return method.invoke(ListenerRegistration.super.getT(), args);
}
finally {
Thread.currentThread().setContextClassLoader(original);
}
}
}
}
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