/*
* 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.weld.environment.servlet;
import javax.enterprise.inject.spi.BeanManager;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.jboss.weld.environment.servlet.logging.WeldServletLogger;
/**
* Emulates the behavior of the naming resource binding that is typically done
* using configuration files in Tomcat and Jetty. This listener provides the ability
* to bind the BeanManager to JNDI without the need for configuration.
*
* @author Dan Allen
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class BeanManagerResourceBindingListener implements ServletContextListener {
private static final String RESOURCES_CONTEXT = "java:comp/env";
private static final String BEAN_MANAGER_JNDI_NAME = "BeanManager";
private static final String QUALIFIED_BEAN_MANAGER_JNDI_NAME = RESOURCES_CONTEXT + "/" + BEAN_MANAGER_JNDI_NAME;
private static final String BEAN_MANAGER_OBJECT_FACTORY = "org.jboss.weld.resources.ManagerObjectFactory";
private boolean bound = false;
public void contextInitialized(ServletContextEvent sce) {
try {
InitialContext ctx = new InitialContext();
boolean present = false;
try {
NamingEnumeration<NameClassPair> entries = ctx.list(RESOURCES_CONTEXT);
while (entries.hasMoreElements()) {
try {
NameClassPair e = entries.next();
if (e.getName().equals(BEAN_MANAGER_JNDI_NAME) && e.getClassName().equals(BeanManager.class)) {
present = true;
break;
}
} catch (Exception e) {
WeldServletLogger.LOG.problemWhenInterating(RESOURCES_CONTEXT, e);
}
}
} catch (NamingException e) {
WeldServletLogger.LOG.couldNotReadContext(RESOURCES_CONTEXT);
try {
Context compCtx = (Context) ctx.lookup("java:comp");
compCtx.createSubcontext("env");
} catch (Exception ex) {
WeldServletLogger.LOG.couldntCreateContext(RESOURCES_CONTEXT);
}
}
if (!present) {
try {
// we rebind just in case it really is there and we just couldn't read it
ctx.rebind(QUALIFIED_BEAN_MANAGER_JNDI_NAME,
new Reference(BeanManager.class.getName(), BEAN_MANAGER_OBJECT_FACTORY, null));
bound = true;
WeldServletLogger.LOG.beanManagerReferenceBoundTo(QUALIFIED_BEAN_MANAGER_JNDI_NAME);
} catch (NamingException e) {
throw WeldServletLogger.LOG.couldNotBindBeanManagerReferenceToJNDI(e.getExplanation());
}
}
} catch (NamingException e) {
throw WeldServletLogger.LOG.couldNotCreateInitialContext(e.getExplanation());
}
}
public void contextDestroyed(ServletContextEvent sce) {
if (bound) {
try {
InitialContext ctx = new InitialContext();
ctx.unbind(QUALIFIED_BEAN_MANAGER_JNDI_NAME);
WeldServletLogger.LOG.successfullyUnboundBeanManagerReference();
} catch (NamingException e) {
WeldServletLogger.LOG.failedToUnbindBeanManagerReference();
}
}
}
}