[Catalyst-dev] RFC: Catalyst::Action::RenderView::ErrorHandler

[Brian Cassidy]

John Napiorkowski wrote:
> Maybe an OT question but what's the purpose of the
> line:
> 
> $Catalyst::Exception::CATALYST_EXCEPTION_CLASS =
> 'MyApp::Exception';
> 
> in the sample from your blog?  Seems like Catalyst
> will catch the exceptions I've been throwing with or
> without it.

Sprinkled throughout the Catalyst code are lines like

Catalyst::Exception->throw( ... );

If you look at the source to Catalyst::Exception, it does this near the top:

BEGIN {
     push( @ISA, $CATALYST_EXCEPTION_CLASS || 'Catalyst::Exception::Base' );
}

So, what the "$Catalyst::Exception::CATALYST_EXCEPTION_CLASS = ..." 
assignment does is allow those calls to actually throw my exception 
class instead.

-Brian