/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed 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.jboss.seam.servlet.event;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.jboss.seam.servlet.ServletRequestContext;
import org.jboss.seam.servlet.event.ImplicitServletObjectsHolder.InternalServletResponseEvent;
import org.jboss.seam.servlet.event.literal.DestroyedLiteral;
import org.jboss.seam.servlet.event.literal.InitializedLiteral;
import org.jboss.seam.servlet.event.literal.PathLiteral;
import org.jboss.seam.servlet.http.HttpServletRequestContext;
/**
* Propagates the {@link ServletResponse} lifecycle events to the CDI event bus, complementing the ServletEventBridgeListener,
* which handles the other lifecycle events.
*
* <p>
* This filter is auto-registered in Servlet 3.0 environments. If CDI injection is available into filters, the BeanManager will
* be accessible to this instance as an injected resource. Otherwise, the BeanManager will be looked up using the BeanManager
* provider service.
* </p>
*
* <p>
* The internal events are fired to ensure that the setup and tear down routines happen around the main events. The event
* strategy is used to jump from a Servlet component which may not be managed by CDI to an observe we know to be a managed bean.
* </p>
*
* @author <a href="http://community.jboss.org/people/dan.j.allen">Dan Allen</a>
*/
public class ServletEventBridgeFilter extends AbstractServletEventBridge implements Filter {
public void init(FilterConfig config) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
fireEvent(new InternalServletResponseEvent(response), InitializedLiteral.INSTANCE);
Path path = null;
if (request instanceof HttpServletRequest) {
path = new PathLiteral(HttpServletRequest.class.cast(request).getServletPath());
fireEvent(response, InitializedLiteral.INSTANCE, path);
fireEvent(new HttpServletRequestContext(request, response), InitializedLiteral.INSTANCE, path);
} else {
fireEvent(response, InitializedLiteral.INSTANCE);
fireEvent(new ServletRequestContext(request, response), InitializedLiteral.INSTANCE);
}
try {
if (!response.isCommitted()) {
chain.doFilter(request, response);
}
} finally {
if (request instanceof HttpServletRequest) {
fireEvent(response, DestroyedLiteral.INSTANCE, path);
fireEvent(new HttpServletRequestContext(request, response), DestroyedLiteral.INSTANCE, path);
} else {
fireEvent(response, DestroyedLiteral.INSTANCE);
fireEvent(new ServletRequestContext(request, response), DestroyedLiteral.INSTANCE);
}
fireEvent(new InternalServletResponseEvent(response), DestroyedLiteral.INSTANCE);
}
}
public void destroy() {
}
}