RSSJSF Session Timeout Handling
Here is the solution for session handling. When your session timed out, you will be redirected to the index page which is commonly the login page to login again.
package com.mypackage.web.session;
import javax.faces.FacesException;
import javax.faces.application.Application;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpSession;
public class SessionPhaseListener implements PhaseListener {
private static final String homepage = "index.jsp";
@Override
public void afterPhase(PhaseEvent event) {
//Do anything
}
@Override
public void beforePhase(PhaseEvent event) {
FacesContext context = event.getFacesContext();
ExternalContext ext = context.getExternalContext();
HttpSession session = (HttpSession) ext.getSession(false);
boolean newSession = (session == null) || (session.isNew());
boolean postback = !ext.getRequestParameterMap().isEmpty();
boolean timedout = postback && newSession;
if (timedout) {
Application app = context.getApplication();
ViewHandler viewHandler = app.getViewHandler();
UIViewRoot view = viewHandler.createView(context, "/" + homepage);
context.setViewRoot(view);
context.renderResponse();
try {
viewHandler.renderView(context, view);
context.responseComplete();
} catch (Throwable t) {
throw new FacesException("Session timed out", t);
}
}
}
@Override
public PhaseId getPhaseId() {
return PhaseId.RESTORE_VIEW;
}
}
Once you created the class above that implements the PhaseListener, add this to you faces-config.xml. Note that the package name depends on your own Java packaging.
tag shows the error message for the input field; and the 
tags as shown below:
tag within the 
component ensures the validation is triggered. If an invalid credit card number is input, the user will be presented with the message defined in the annotation.
component which simply binds directly to the creditCard attribute of the current booking instance.
component allows us to iterate over the list of CreditCard entities and display the description by referencing the type variable. The 
tag ensures that the user selection is converted to an entity for association with the booking instance.
