Hi guys .
Can anyone tell me a way of redirecting a user to the home page from another page after the session has expired and also put an object in the sesssion variable after the session has expired .Because when I try to redirect a user to the Home page after the session expires using "response.sendRedirect" I get the NullPointerException
This is my class that implements the HttpSessionListener listener and tries to redirect to the home page on the expiry of a session.
///////////////////////////////////////////////////////////////////////////////
public class SessionMaintainence implements HttpSessionListener //, HttpSessionListener
{
private String strUsername;
private HttpServletRequest request;
private ServletContext application;
private long createTime;
private String sIPAddrress;
private Vector sessionNames;
private HttpSession session;
private HttpServletResponse response;
private static int activeSessions = 0;
public SessionMaintainence()
{
}
public SessionMaintainence(HttpServletRequest req, String userID , ServletContext sc, long ctime, String sIP)
{
strUsername = userID;
request = req;
application = sc;
createTime = ctime;
sIPAddrress = sIP;
session = request.getSession();
}
public SessionMaintainence(String userID, Vector sessionNames, ServletContext sc)
{
strUsername = userID;
application = sc;
this.sessionNames = sessionNames;
}
public void sessionCreated(HttpSessionEvent se) {
activeSessions++;
}
public void sessionDestroyed(HttpSessionEvent se) {
if(activeSessions > 0)
activeSessions--;
try{
response.sendRedirect(Global.BASE_URL + Global.WELCOME_URL);
session.setAttribute("errorMessage","Please login again.");
}catch(Throwable e){
e.printStackTrace();
}
}
public static int getActiveSessions() {
return activeSessions;
}
}
///////////////////////////////////////////////////////////////////////////////
Thanks.
