[Zope-CMF] Re: Zope 3 events from workflow

[Sidnei da Silva]

On 12/27/06, Martin Aspeli <optilude at gmx.net> wrote:
> Right - that was the question I was asking. *Is* this an event that's
> useful outside the framework?

I believe so. For example, a subscriber that wants to know if an
action has succeeded, no matter where/when, so it can purge an
external cache (hint, hint) will want to subscribe to
'IWorkflowActionSuccess', not to I{Before,After}TransitionEvent.

It wants to know if the action succeded, not execute something
before/after the action happens.

It also wants to fire only when the action succeeds, not when an
exception is raised.

> Okay. I still think (and I think we agree) that such an event
> fundamentally has a different type of "audience" than the before/after
> transition events in DCWorkflow (which use DCWorkflow-specific
> information that's generally useful in CMFCore, Plone and elsewhere). I
> won't try to do this refactoring in the patch I'm proposing, but of
> course it could be done later.

The more I think about it, the more I wish you do it as soon as
possible. It wouldn't take you long, since you have it all in your
head by now.

-- 
Sidnei da Silva
Enfold Systems                http://enfoldsystems.com
Fax +1 832 201 8856     Office +1 713 942 2377 Ext 214