001    /**
002     * 
003     * $Revision: 13776 $ $Date: 2008-07-29 16:31:02 +0200 (Di, 29 Jul 2008) $
004     *
005     * This file is part of ** M y C o R e **
006     * Visit our homepage at http://www.mycore.de/ for details.
007     *
008     * This program is free software; you can use it, redistribute it
009     * and / or modify it under the terms of the GNU General Public License
010     * (GPL) as published by the Free Software Foundation; either version 2
011     * of the License or (at your option) any later version.
012     *
013     * This program is distributed in the hope that it will be useful, but
014     * WITHOUT ANY WARRANTY; without even the implied warranty of
015     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016     * GNU General Public License for more details.
017     *
018     * You should have received a copy of the GNU General Public License
019     * along with this program, normally in the file license.txt.
020     * If not, write to the Free Software Foundation Inc.,
021     * 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
022     *
023     **/
024    package org.mycore.common.events;
025    
026    import javax.servlet.ServletContextEvent;
027    import javax.servlet.ServletContextListener;
028    
029    import org.apache.log4j.Logger;
030    
031    import org.mycore.common.MCRConfiguration;
032    
033    /**
034     * is a shutdown hook for the current <code>ServletContext</code>.
035     * 
036     * For this class to register itself as a shutdown hook to the current ServletContext please add the following code to your web.xml (allready done in MyCoRe-shipped version):
037     * <pre>
038          &lt;listener&gt;
039                &lt;listener-class&gt;org.mycore.common.events.MCRServletContextListener&lt;/listener-class&gt;
040          &lt;/listener&gt;
041     * </pre> 
042     * 
043     * @author Thomas Scheffler (yagee)
044     * @see org.mycore.common.events.MCRShutdownHandler
045     * @since 1.3
046     */
047    public class MCRServletContextListener implements ServletContextListener {
048    
049        private static final Logger LOGGER = Logger.getLogger(MCRServletContextListener.class);
050    
051        public void contextInitialized(ServletContextEvent sce) {
052            //Make sure logging is configured
053            MCRConfiguration.instance();
054            // register to MCRShutdownHandler
055            LOGGER.info("Register ServletContextListener to MCRShutdownHandler");
056            MCRShutdownHandler.getInstance().isWebAppRunning = true;
057        }
058    
059        public void contextDestroyed(ServletContextEvent sce) {
060            // shutdown event
061            MCRShutdownHandler.getInstance().shutDown();
062        }
063    }