Wicket Ajax Session time out problem

Wicket is super cool Web framework. Doing Ajax stuff is even more cooler. I just love saying cool , kool , kewl.

Most/All of the applications using wicket need a way to handle session time out with Ajax request.So I thought of putting it on my blog.



Wicket life cycle method made everything very easy and that's just kool(Cant help my self)

In just 2 simple steps you can handle Ajax session time out problem.

So here what you need to do:

Step 1:
First override newRequestCycle method in your webApplication class. Like below

    public RequestCycle newRequestCycle(Request request, Response response) {

     // TODO Auto-generated method stub

     return new CustomRequestCycle(this, (WebRequest)request, response);

    }

Step 2:

Create new CustomRequestCycle class which extends WebRequestCycle like below

public class CustomRequestCycle extends WebRequestCycle{



 public CustomRequestCycle(final WebApplication application, final WebRequest request, final Response response) {

  super(application, request, response);

 }

 @Override

 public final Page onRuntimeException(final Page cause, final RuntimeException e) {

  // obviously you can check the instance of the exception and return the appropriate page if desired

   if  (e instanceof PageExpiredException) {   

             if ( this.getWebRequest().isAjax()) {                  

                   return new YourSignonPage(new PageParameters());

             }

         }

  return new YourCustomErrorPage(e);

 }

}

See how I override onRuntimeException method. Just check for PageExpiredException and if its Ajax request , return your Sign On Page.

That's it. Kool :)