/*
* 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.exception;
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.logging.Logger;
import org.jboss.seam.exception.control.ExceptionToCatch;
import org.jboss.seam.servlet.literal.WebRequestLiteral;
import org.jboss.seam.servlet.support.ServletLogger;
import org.jboss.seam.solder.beanManager.BeanManagerAware;
import org.jboss.seam.solder.beanManager.BeanManagerUnavailableException;
import org.jboss.seam.solder.core.Requires;
/**
* A bridge that forwards unhandled exceptions to the Seam exception handling facility (Seam Catch).
*
* @author <a href="http://community.jboss.org/people/dan.j.allen">Dan Allen</a>
*/
@Requires("org.jboss.seam.exception.control.extension.CatchExtension")
public class CatchExceptionFilter extends BeanManagerAware implements Filter {
private transient ServletLogger log = Logger.getMessageLogger(ServletLogger.class, ServletLogger.CATEGORY);
private boolean enabled = false;
public void init(FilterConfig config) throws ServletException {
try {
if (!getBeanManager().getBeans(CatchExceptionFilter.class).isEmpty()) {
enabled = true;
log.catchIntegrationEnabled();
}
} catch (BeanManagerUnavailableException e) {
log.catchIntegrationDisabledNoBeanManager();
}
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
if (!enabled) {
chain.doFilter(request, response);
} else {
try {
chain.doFilter(request, response);
} catch (Exception e) {
ExceptionToCatch catchEvent;
if (request instanceof HttpServletRequest) {
catchEvent = new ExceptionToCatch(e, WebRequestLiteral.INSTANCE);
// new PathLiteral(HttpServletRequest.class.cast(request).getServletPath()));
} else {
catchEvent = new ExceptionToCatch(e, WebRequestLiteral.INSTANCE);
}
getBeanManager().fireEvent(catchEvent);
// QUESTION should catch handle rethrowing?
if (!catchEvent.isHandled()) {
if (e instanceof ServletException) {
throw (ServletException) e;
} else if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new ServletException(e);
}
}
}
}
}
public void destroy() {
}
}