Thanks, Howard, this is what I was looking for!
Is this a reasonable place to do rollback on error?
Is there a single hook I can add to catch *any* error (e.g. "on any
type of failure do X, then continue rendering the normal error
page")? Or do I have a add a contribution for each of those different
error pages: exception, stale link, etc.?
Cheers,
Paul
On Aug 15, 2005, at 12:52 PM, Howard Lewis Ship wrote:
In Tapestry 4.0 theres a service you can override that controls
exception reporting.
http://jakarta.apache.org/tapestry/tapestry/hivedocs/service/
tapestry.error.ExceptionPresenter.html
You can see how this is integrated into the rest of the framework:
http://jakarta.apache.org/tapestry/tapestry/hivedocs/module/
tapestry.error.html
<property name="exceptionPresenter"
object="service:ExceptionPresenter" />
By contributing a like service to tapestry.InfrastructureOverrides you
can get precise control over exceptions.
On 8/15/05, Paul Cantrell <[EMAIL PROTECTED]> wrote:
I'd like to place a hook in Tapestry to know when a request fails, so
that I can:
(1) roll back my transaction,
(2) send an email to the administrator, and
(3) show a user-friendly error page.
I'd normally do this through my web.xml (servlet filter + error page
descriptor), but Tapestry swallows exceptions and doesn't pass them
to the container. Of course this makes sense in my dev environment --
I *want* the very helpful error reporting! -- but not in production.
And even in dev, I still want the rollback.
So what is the right point to hook in this custom error handling?
It seems that I can create an "Exception" page. That addresses (3),
but what about (1) and (2)? Do I make the Exception page class
implement PageAttachListener or PageBeginRenderListener and do
rollback & email there ... or is that just a hack?
What is the best-practice approach here?
Cheers,
Paul
_________________________________________________________________
"Verbing weirds language." -- Bill Watterson
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Howard M. Lewis Ship
Independent J2EE / Open-Source Java Consultant
Creator, Jakarta Tapestry
Creator, Jakarta HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
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