Creating Lifecycle Listeners
This free, multimedia tutorial shows you how to use IBM's Rational Application Developer (IRAD) 6.0 to create
a lifecycle listener that will respond to the creation of an HttpSession, or the initializing of a
web application. In other words, the component created implements the HttpSessionListener and the
ServletContextListener interfaces. How's that for excitement?
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package com.examscam.web.listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
public class MyKewlListener implements ServletContextListener, HttpSessionListener {
public void contextInitialized(ServletContextEvent contextEvent) {
contextEvent.getServletContext().setAttribute("timestamp", new java.util.Date());
System.out.println("Context Initialized");
}
public void contextDestroyed(ServletContextEvent arg0) {
// TODO Auto-generated method stub
}
public void sessionCreated(HttpSessionEvent sessionEvent) {
String magicKey = ""+ System.currentTimeMillis() % 100;
sessionEvent.getSession().setAttribute("magicKey", magicKey);
System.out.println("Session Initialized");
}
/* (non-Java-doc)
* @see javax.servlet.http.HttpSessionListener#sessionDestroyed(HttpSessionEvent arg0)
*/
public void sessionDestroyed(HttpSessionEvent arg0) {
System.out.println("Session Destroyed");
}
}
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