contextloaderlistener.java

wmoa办公自动化系统 小型的JAVA项目 功能包括审批流 消息发布等

package com.dudu.moa.commons;


import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.log4j.Logger;
import org.springframework.web.context.ContextLoader;

/**
 * Bootstrap listener to start up Spring's root WebApplicationContext.
 * Simply delegates to ContextLoader.
 *
 * <p>This listener should be registered after Log4jConfigListener in web.xml,
 * if the latter is used.
 *
 * <p>For Servlet 2.2 containers and Servlet 2.3 ones that do not initalize
 * listeners before servlets, use ContextLoaderServlet. See the latter's Javadoc
 * for details.
 *
 * @author Juergen Hoeller
 * @since 17.02.2003
 * @see ContextLoader
 * @see ContextLoaderServlet
 * @see org.springframework.web.util.Log4jConfigListener
 */
public class ContextLoaderListener implements ServletContextListener {
	private Logger log = Logger.getLogger(getClass().getName());

	private ContextLoader contextLoader;


	/**
	 * Initialize the root web application context.
	 */
	public void contextInitialized(ServletContextEvent event) {
		this.contextLoader = createContextLoader();
		log.debug("context starting");
		//SpringFactoryHelp.setApplicationContext(contextLoader.initWebApplicationContext(event.getServletContext()));
		ApplicationContextFactory.setAc(contextLoader.initWebApplicationContext(event.getServletContext()));
	}

	/**
	 * Create the ContextLoader to use. Can be overridden in subclasses.
	 * @return the new ContextLoader
	 */
	protected ContextLoader createContextLoader() {
		return new ContextLoader();
	}

	/**
	 * Return the ContextLoader used by this listener.
	 */
	public ContextLoader getContextLoader() {
		return contextLoader;
	}


	/**
	 * Close the root web application context.
	 */
	public void contextDestroyed(ServletContextEvent event) {
		if (this.contextLoader != null) {
			this.contextLoader.closeWebApplicationContext(event.getServletContext());
			//SpringFactoryHelp.setApplicationContext(null);
			ApplicationContextFactory.setAc(null);
		}
	}

}