[Zope3-dev] Re: [Zope3-Users] Ordering of subscribers

[Martijn Faassen]

Stephan Richter wrote:
> On Monday 13 December 2004 11:11, Florent Guillaume wrote:
> 
>>What's the current best practice if you have several subscribers to an
>>event that need to be called in a given order ? Or rather, one has to be
>>called after another.
>>
>>It's more a gedankenexperiment than anything else at the moment, but I'm
>>interested in case it's needed for a correct backport for Zope 3 events
>>to Zope 2.

I haven't seen the original message, but note that Five already 
backports Zope 3 events to Zope 2. Zope 3's event system is really 
really very simple right now.

The hard part with backporting anything *interesting*, for instance Zope 
3 catalog functionality, is that it makes certain assumptions about the 
way for instance unique ids are maintained that aren't true in Zope 3. 
Other difficult things to backport are local utilities (or local 
anything, basically) that listens to the events.

Regards,

Martijn