Session Time Out and Redirect to login page - urgent

Question

My problem is I want to display alert message and redirect to the home page when session expires.
Iam using TimeOutListener in my application as follows.
public PhaseId getPhaseId() {
return PhaseId.ANY_PHASE;
public void beforePhase(PhaseEvent phaseEvent) {
     FacesContext facesContext = phaseEvent.getFacesContext();
HttpSession sessionx = (HttpSession)facesContext.getExternalContext().getSession(false);
if(sessionx == null) {
     FacesUtils.sessionCheck = true;
String ampee = (String)((HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getAttribute("ampee");
if(ampee != null && ampee.equals("ampee")) FacesUtils.sessionCheck = false;
if(phaseEvent.getPhaseId() == PhaseId.RENDER_RESPONSE) {
     if(FacesUtils.sessionCheck){
     facesContext.getApplication().getNavigationHandler().handleNavigation(facesContext, "", "sessionExpired" );
     FacesUtils.sessionCheck = false;
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
          HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();
          HttpSession session = request.getSession();
          if (session.isNew()) {
               try {
               String errorPageURL = externalContext.getRequestContextPath() +
               "/index.jsf?errorpage=true";
               externalContext.redirect(errorPageURL);
               }catch(Exception e){
                    e.printStackTrace();
here i have appended param errorPage=true...
in jsp page i have used following code to get the param<% if(request.getParameter(errorPage)!=null && request.getParameter(errorPage).equals("true")){%>
<script>alert("session expired");</script>
<%
%>
Can any one help me how to Implement this?
Do u know another way pls let me know...

Answer 1

Consider using the Javascript setTimeout() function in conjunction with HttpSession#getMaxInactiveInterval(). The HttpSession#getMaxInactiveInterval() returns the remaining seconds of the session lifetime.
Basic example:<script>
    setTimeout("alert('The session will timeout after one minute.')", <%= (session.getMaxInactiveInterval() * 1000) - 60000 %>);
</script>I've given the client one minute (60000ms) extra time space to respond accordingly.
Use this in combination with the following head:
<meta http-equiv="refresh" content="<%= session.getMaxInactiveInterval() %>;url=login.jsf">which will redirect to login.jsf if the session is timed out. You can also redirect to another page of your taste, e.g. error.jsf or so.