[Catalyst] plugins; was Re: debug mode

Matt S Trout dbix-class at trout.me.uk
Thu Jun 7 14:43:19 GMT 2007

On Thu, Jun 07, 2007 at 03:55:16AM -0700, Jonathan Swartz wrote:
> mia wrote:
> >Matt S Trout wrote:
> >> On Wed, Jun 06, 2007 at 02:18:33PM -0700, mla wrote:
> >>> Matt S Trout wrote:
> >>>> On Wed, Jun 06, 2007 at 12:29:12PM -0700, mla wrote:
> >>>>> Is it not possible to offer the current Catalyst instance through
> >>>>> a class method? Something analogous to Apache->request, rather  
> than
> >>>>> having to do the whole ACCEPT_CONTEXT prototype object thing?
> >>>> Not without limiting ourselves in terms of planned future  
> features. Jifty
> >>>> does this because they're explicitly one app per process. We  
> aren't.
> >>> When you say "per process," you mean operating system process?
> >>> You're talking about threading issues?
> >>
> >> Threading, forking, and OS-level COW.
> >
> >Forking and COW would apply just as much to instances though.
> >
> >Assuming I'm not using threads, how would I hurt myself by
> >subclassing Catalyst and supplying a MyApp->context that returns
> >the current catalyst context?
> Yes, I'd like to know more about this too please. Mason has a similar  
> construct - HTML::Mason::Request->instance() - and it works fine with  
> Mason subrequests or recursive calls to an entirely different Mason  
> interpreter. It just returns the value of a dynamically scoped  
> variable that is set at the beginning of a Mason request.

If you like that style, load Catalyst::Plugin::Singleton and enjoy. I don't
but I'm not the arbiter of bad code :)

> I dislike the fact that anything that needs to access the current  
> context object has to be written as a component, and thus have a  
> completely different calling signature than just a plain extension.

Different how? ACCEPT_CONTEXT tricks are generally transparent to the rest
of the code in that class.

      Matt S Trout       Need help with your Catalyst or DBIx::Class project?
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