/*
* $Id: PlexusLifecycleListener.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.struts2.plexus;
import java.util.Collections;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import org.codehaus.plexus.DefaultPlexusContainer;
import org.codehaus.plexus.PlexusContainer;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* Manages the Plexus lifecycle for the servlet and session contexts
*/
public class PlexusLifecycleListener implements ServletContextListener, HttpSessionListener {
private static final Logger LOG = LoggerFactory.getLogger(PlexusObjectFactory.class);
private static boolean loaded = false;
public static final String KEY = "struts.plexus.container";
/**
* @return Returns if the container is loaded.
*/
public static boolean isLoaded() {
return loaded;
}
/* (non-Javadoc)
* @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
*/
public void contextInitialized(ServletContextEvent servletContextEvent) {
loaded = true;
try {
PlexusContainer pc = new DefaultPlexusContainer();
PlexusUtils.configure(pc, "plexus-application.xml");
ServletContext ctx = servletContextEvent.getServletContext();
ctx.setAttribute(KEY, pc);
pc.initialize();
pc.start();
} catch (Exception e) {
LOG.error("Error initializing plexus container (scope: application)", e);
}
}
/* (non-Javadoc)
* @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
*/
public void contextDestroyed(ServletContextEvent servletContextEvent) {
try {
ServletContext ctx = servletContextEvent.getServletContext();
PlexusContainer pc = (PlexusContainer) ctx.getAttribute(KEY);
pc.dispose();
} catch (Exception e) {
LOG.error("Error disposing plexus container (scope: application)", e);
}
}
/* (non-Javadoc)
* @see javax.servlet.http.HttpSessionListener#sessionCreated(javax.servlet.http.HttpSessionEvent)
*/
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
try {
HttpSession session = httpSessionEvent.getSession();
ServletContext ctx = session.getServletContext();
PlexusContainer parent = (PlexusContainer) ctx.getAttribute(KEY);
PlexusContainer child = parent.createChildContainer("session", Collections.EMPTY_LIST, Collections.EMPTY_MAP);
session.setAttribute(KEY, child);
PlexusUtils.configure(child, "plexus-session.xml");
child.initialize();
child.start();
} catch (Exception e) {
LOG.error("Error initializing plexus container (scope: session)", e);
}
}
/* (non-Javadoc)
* @see javax.servlet.http.HttpSessionListener#sessionDestroyed(javax.servlet.http.HttpSessionEvent)
*/
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
try {
HttpSession session = httpSessionEvent.getSession();
PlexusContainer child = (PlexusContainer) session.getAttribute(KEY);
child.dispose();
} catch (Exception e) {
LOG.error("Error initializing plexus container (scope: session)", e);
}
}
}