Re: Exception handling in Spring-MVC/FreeMarker web applications

Now I remember.. the default was html debug I believe.. this shows the yellow trace in the browser, which is a good default for dev.  I think a blurb about switching this for prod would be a good addition to the doco (an earlier part most people actually read).  If you google for a few terms on that page a bit you'll find lots of people have apps in prod without this configured.  =)

So once I found this exists, I switched to rethrow, and now the error is caught by our exception handler bean upstream.  This guy is configured through the stripes framework, I'd imagine spring MVC offers a similar exception handling facility.

The handler gets the template exception, logs it (among other things), and then sends the user to our nice 500 page.  This page has a piece in it to check if the app is running in debug mode, and if so it will render the trace nicely for the developer.


-----Original Message-----
From: [email protected] [mailto:[email protected]] 
Sent: Wednesday, October 21, 2009 4:26 PM
To: Daniel Dekany; FreeMarker-user
Subject: Re: [FreeMarker-user] Exception handling in Spring-MVC/FreeMarker web applications

Maybe... but if the handler rethrows the exception, what catches it in the
SpringMVC environment? How would my app know to force a 500 error response
back to the client? I'm trying to get my brain round that. I think I need
to experiment a bit.

Daniel Dekany <[email protected]> wrote on 10/21/2009 02:08:39 PM:

> Wednesday, October 21, 2009, 9:58:17 PM, [email protected] wrote:
>
> > That's great. I think I need either IGNORE_HANDLER or perhaps develop
my
> > own custom handler. Either way, this is the key. Thanks!
>
> Nah, certainly you want the "rethrow" handler... Unless you want buggy
> templates to return a some half-done response without showing any
> error message to the user.
>
> > "Newman, John W" <[email protected]> wrote on 10/21/2009
01:13:57
> > PM:
> >
> >> Hi -
> >>
> >> Take a look at
> >>
> >>       configuration.
> >> setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
> >>
> >> RETHROW_HANDLER may not be what you want ... I forget what each
> >> does, there are a few different options.  But that's the setting
you're
> > after
> >>
> >> -----Original Message-----
> > [snip]
> >
> >
> >
>
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>  Daniel Dekany
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>
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