Hi Lenny

I am using ajax grid in many of my applications. As I am using 5.2.6
on some of the projects, I use my tapestry.js hack for it.

The inability of grid to provide zone parameter (as others components
do) instead of inplace is a limitation but I think this can be sorted
out with the new ajax support.(I have not tried it yet but I think it
can be done).

Regarding session expiry, I think a simple redirect to a session
expired page can be useful both for ajax and non-ajax situations.


On Tue, Sep 20, 2011 at 1:24 PM, Lenny Primak <[email protected]> wrote:
> Hi guys,
>
> I just want to share my thoughts with you regarding my experience building 
> pretty simple infrastructure.
> Don't get me wrong, I love tapestry but I think there's definitely room for 
> improvement here.
>
> My goal was simple:  Develop a page that has an Ajax Grid that is backed by a 
> database table.
>
> To get this into somewhat decent shape it took about one man-month, which I 
> think could be improved.
> After a minor hiccup with JPA and problems with multiple database support, I 
> got the basic page up and
> running rather quickly. (kudos)
> Afterwards, I started noticing minor issues that took major time to fix.
> What I wound up with is a hodgepodge of hacks/workarounds to get everything 
> just right.
> Lots of JavaScript and event handling code.
> I believe that this stuff should work out of the box.
>
> It all boiled down to one major issue:
> Tapestry does not know how to deal with Ajax and expiring sessions.
> I would either get an error dialog, an exception, NULL data, or all of the 
> above when:
> - clicking on the Grid pager
> - clicking on a button that would update the grid (Ajax)
>
> Basically there are about 10 corner cases that deal with expired sessions that
> were very hard to track down.
>
> All my hacks/workarounds do one thing:  When Ajax call is made,
> and the session is invalid (or new w/o SetupRender being called)
> I redirect to the same page, causing a reload or relogin if security 
> credentials also expired.
>
> I will try to post as much of this as I can as soon as I can on the wiki or 
> github or both,
> but I think this functionality should work out-of-the box.
>
> Thanks for the great product, and will be going into production soon.
>
>
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-- 
Regards

Taha Hafeez Siddiqi (tawus)
http://tawus.wordpress.com

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