/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc., 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.faces.exception;
import javax.enterprise.inject.spi.BeanManager;
import javax.faces.context.ExceptionHandler;
import javax.faces.context.ExceptionHandlerFactory;
import org.jboss.logging.Logger;
import org.jboss.seam.solder.beanManager.BeanManagerLocator;
import org.jboss.seam.solder.beanManager.BeanManagerUnavailableException;
/**
* This class is registered with the JSF framework to invoke the <code>CatchExceptionHandler</code> as part of the JSF lifecycle
*
* @author <a href="mailto:bleathem@gmail.com">Brian Leathem</a>
* @author <a href="http://community.jboss.org/people/dan.j.allen">Dan Allen</a>
*/
public class CatchExceptionHandlerFactory extends ExceptionHandlerFactory {
private transient final Logger log = Logger.getLogger(CatchExceptionHandlerFactory.class);
private ExceptionHandlerFactory parent;
private transient boolean catchUnavailable = false;
private transient BeanManagerLocator locator;
public CatchExceptionHandlerFactory(ExceptionHandlerFactory parent) {
super();
this.parent = parent;
}
@Override
public ExceptionHandler getExceptionHandler() {
log.trace("Creating the JSF exception handler");
if (catchUnavailable) {
log.trace("Catch integration previously disabled");
return parent.getExceptionHandler();
}
BeanManager beanManager = null;
try {
locator = new BeanManagerLocator();
beanManager = locator.getBeanManager();
} catch (BeanManagerUnavailableException e) {
log.info("Could not location BeanManager, Catch integration disabled");
catchUnavailable = true;
return parent.getExceptionHandler();
}
// TODO this looks like a nice utility for Solder
if (beanManager.getBeans(CatchExceptionHandler.class).isEmpty()) {
log.info("Catch not available, Catch integration disabled");
catchUnavailable = true;
return parent.getExceptionHandler();
}
if (log.isTraceEnabled()) {
log.trace("Catch integration enabled");
}
return new CatchExceptionHandler(parent.getExceptionHandler(), beanManager);
}
}