[Zope3-dev] Building placeful services

[Gary Poster]

Hi all.  I'd like to get some of the placeful Component Architecture 
services built.  I was waiting on the Packaging service to land (or 
enough info to help build it :-) before I tackled this, but now I want 
to play around with some things that require at least a start on 
placeful CA services.  So:

1) If I build some prototyped simple placeful services that just use 
"provide"-type interfaces for adding components to them for now, I'm 
guessing they will be reasonably good starting points for the real 
things once the Packaging service arrives.  Anyone mind if I check these 
into CVS when I get them done?  Zope.App.OFS.Services.AdapterService and 
so, I guess.

2) If that's ok, then to proceed: I think it would be useful to have a 
persistent ItoIRegistry around for our placeful services (yes, in 
*addition* to the clean one currently in Zope.ComponentArchitecture). 
 I'm guessing this can be very simple:

from Zope.ComponentArchitecture.IToIRegistry import IToIRegistry
from Persistence import Persistent, PersistentMapping

class PersistentIToIRegistry(ItoIRegistry, Persistent):
   
    def __init__(self):
        self._reg = PersistentMapping()

...and then, for completeness, all the rest of the variations in the 
current IToIRegistry.

I figure we could put this in 
Zope.App.ComponentArchitecture.PersistentIToIRegistry.  

Are there any objections or good reasons not to proceed with that?


Gary