cmu.survey.jsp
Class WebappShutdownListener

java.lang.Object
  cmu.survey.jsp.WebappShutdownListener

All Implemented Interfaces:

java.util.EventListener, javax.servlet.ServletContextListener

public class WebappShutdownListener
extends java.lang.Object
implements javax.servlet.ServletContextListener

Do stuff at a webapp's shutdown. Since this can't be invoked directly at startup time, we have to do a roundabout registration technique -- webapps can register a shutdown listener (which is an ActionListener) that will get called at shutdown time, via this class, since we can't register a shutdown listener directly to the JSP Servlet Engine. It took me so long to find this interface and how to use it in web.xml, found eventually at: http://www.mail-archive.com/tomcat-user@jakarta.apache.org/msg147108.html

Field Summary

static java.util.Vector<java.awt.event.ActionListener>

shutdownListeners

Constructor Summary

WebappShutdownListener()

Method Summary

static void	addShutdownListener(java.awt.event.ActionListener actionListener)
void	contextDestroyed(javax.servlet.ServletContextEvent arg0)
void	contextInitialized(javax.servlet.ServletContextEvent arg0)
static boolean	removeShutdownListener(java.awt.event.ActionListener actionListener)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

shutdownListeners

public static java.util.Vector<java.awt.event.ActionListener> shutdownListeners

Constructor Detail

WebappShutdownListener

public WebappShutdownListener()

Method Detail

addShutdownListener

public static void addShutdownListener(java.awt.event.ActionListener actionListener)

removeShutdownListener

public static boolean removeShutdownListener(java.awt.event.ActionListener actionListener)

contextDestroyed

public void contextDestroyed(javax.servlet.ServletContextEvent arg0)

Specified by:

contextDestroyed in interface javax.servlet.ServletContextListener

contextInitialized

public void contextInitialized(javax.servlet.ServletContextEvent arg0)

Specified by:

contextInitialized in interface javax.servlet.ServletContextListener