Session Expires Question

[Scott Purcell <sp...@vertisinc.com>]

Hello,
I am creating a shopping cart application where each web-user has a shoppingcart/userobject in their session. The problem is, unlike most software I create, there is no userlogin. I would like to be able to show them a jsp page that states when their session has expired, and that they will have to acquire their widgets again.
 
The main problem I am having is understanding how to do this using struts. The way I have built the SW is as follows. I have a welcome-file page that goes to an Action instead of just using a index.jsp page. The action creates a shopping cart object and places it in the session. The problem is that the index.jsp page is called everytime they hit 'home' which is the top level product page.
 
Does anyone have any ideas, or examples of how this could be accomplished. Also, I did create a subclass for Action in which I check and ensure that the shoppingcart/userobject exists. I just can't figure out how to handle this when it goes away.
 
Any input or help would be appreciated.
 
Sincerely, 

Scott K Purcell                          

 

RE: Session Expires Question

[Daniel Perry <d....@netcase.co.uk>]

I do exactly the same kind of thing with a site.  All actions extend
BaseAction which extends Action, and implement executeAction, not execute.

The (relevant)code for BaseAction:

abstract public class BaseAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if (isSessionValid(request)) {
            return executeAction(mapping, form, request, response);
        } else {
            return mapping.findForward("showsessionexpired");
        }
    }

    abstract public ActionForward executeAction(ActionMapping mapping,
            ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception;

    private boolean isSessionValid(HttpServletRequest request){
    ... // check for presence of session var
    }
}

isSessionValid is a function you must define in this class to check for the
presence of a particular var.  It forwards to the showsessionexpired
global-forward if not.

Daniel.


> -----Original Message-----
> From: Scott Purcell [mailto:spurcell@vertisinc.com]
> Sent: 23 February 2005 13:56
> To: user@struts.apache.org
> Subject: Session Expires Question
>
>
> Hello,
> I am creating a shopping cart application where each web-user has
> a shoppingcart/userobject in their session. The problem is,
> unlike most software I create, there is no userlogin. I would
> like to be able to show them a jsp page that states when their
> session has expired, and that they will have to acquire their
> widgets again.
>
> The main problem I am having is understanding how to do this
> using struts. The way I have built the SW is as follows. I have a
> welcome-file page that goes to an Action instead of just using a
> index.jsp page. The action creates a shopping cart object and
> places it in the session. The problem is that the index.jsp page
> is called everytime they hit 'home' which is the top level product page.
>
> Does anyone have any ideas, or examples of how this could be
> accomplished. Also, I did create a subclass for Action in which I
> check and ensure that the shoppingcart/userobject exists. I just
> can't figure out how to handle this when it goes away.
>
> Any input or help would be appreciated.
>
> Sincerely,
>
> Scott K Purcell
>
>
>


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