/*
* JBoss, Home of Professional Open Source
* Copyright 2008, 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.as.weld.webtier.jsf;
import javax.el.ELResolver;
import javax.el.ExpressionFactory;
import javax.enterprise.inject.spi.BeanManager;
import javax.faces.application.Application;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.weld.el.WeldELContextListener;
/**
* @author pmuir
*
*/
public class WeldApplication extends ForwardingApplication {
private static class AdjustableELResolver extends ForwardingELResolver {
private ELResolver delegate;
public void setDelegate(ELResolver delegate) {
this.delegate = delegate;
}
@Override
protected ELResolver delegate() {
return delegate;
}
}
private final Application application;
private volatile ExpressionFactory expressionFactory;
private AdjustableELResolver elResolver;
private volatile boolean initialized;
private volatile BeanManager beanManager;
public WeldApplication(Application application) {
this.application = application;
application.addELContextListener(new WeldELContextListener());
elResolver = new AdjustableELResolver();
elResolver.setDelegate(new DummyELResolver());
application.addELResolver(elResolver);
}
private void init() {
if (!initialized && beanManager() != null) {
elResolver.setDelegate(beanManager().getELResolver());
initialized = true;
}
}
@Override
protected Application delegate() {
init();
return application;
}
@Override
public ExpressionFactory getExpressionFactory() {
init();
// may be improved for thread safety, but right now the only risk is to invoke wrapExpressionFactory
// multiple times for concurrent threads. This is ok, as the call is
if (expressionFactory == null) {
BeanManager bm = beanManager();
if (bm == null) {
expressionFactory = application.getExpressionFactory();
} else {
expressionFactory = bm.wrapExpressionFactory(application.getExpressionFactory());
}
}
return expressionFactory;
}
private BeanManager beanManager() {
if (beanManager == null) {
synchronized (this) {
if (beanManager == null) {
try {
beanManager = (BeanManager) new InitialContext().lookup("java:comp/BeanManager");
} catch (NamingException e) {
return null;
}
}
}
}
return beanManager;
}
}