/*
* Copyright 2002-2009 the original author or authors.
*
* 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.springframework.web.context;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* Bootstrap listener to start up and shut down Spring's root {@link WebApplicationContext}.
* Simply delegates to {@link ContextLoader} as well as to {@link ContextCleanupListener}.
*
* <p>This listener should be registered after
* {@link org.springframework.web.util.Log4jConfigListener}
* in <code>web.xml</code>, if the latter is used.
*
* @author Juergen Hoeller
* @since 17.02.2003
* @see org.springframework.web.util.Log4jConfigListener
*/
public class ContextLoaderListener extends ContextLoader implements ServletContextListener {
private ContextLoader contextLoader;
/**
* Initialize the root web application context.
*/
public void contextInitialized(ServletContextEvent event) {
this.contextLoader = createContextLoader();
if (this.contextLoader == null) {
this.contextLoader = this;
}
this.contextLoader.initWebApplicationContext(event.getServletContext());
}
/**
* Create the ContextLoader to use. Can be overridden in subclasses.
* @return the new ContextLoader
* @deprecated in favor of simply subclassing ContextLoaderListener itself
* (which extends ContextLoader, as of Spring 3.0)
*/
@Deprecated
protected ContextLoader createContextLoader() {
return null;
}
/**
* Return the ContextLoader used by this listener.
* @return the current ContextLoader
* @deprecated in favor of simply subclassing ContextLoaderListener itself
* (which extends ContextLoader, as of Spring 3.0)
*/
@Deprecated
public ContextLoader getContextLoader() {
return this.contextLoader;
}
/**
* Close the root web application context.
*/
public void contextDestroyed(ServletContextEvent event) {
if (this.contextLoader != null) {
this.contextLoader.closeWebApplicationContext(event.getServletContext());
}
ContextCleanupListener.cleanupAttributes(event.getServletContext());
}
}
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