On Dec 2, 2009, at 12:47 PM, Francis J. Lacoste wrote: > On December 2, 2009, Gary Poster wrote: >> On Dec 2, 2009, at 11:41 AM, Muharem Hrnjadovic wrote: >>> Gary Poster wrote: >>>> On Dec 2, 2009, at 10:41 AM, Muharem Hrnjadovic wrote: >>>>> Quick question: >>>>> >>>>> do we use the zope class registry anywhere? >>>> >>>> I doubt it. >>>> >>>>> Is it safe to use within >>>>> Launchpad? >>>> >>>> I'd prefer to use utility registration if that can work with your use >>>> case. >>> >>> Sorry for not being precise enough. In my particular case a number of >>> classes would implement the interface in question (IBuildFarmJob). >>> >>> I understood the utility registration mechanism requires that there is >>> exactly one class that implements a particular interface in which case I >>> could not use it for the interface/purpose at hand. >> >> The class registry you showed had keys and values. >> >> You can register different utilities for the same interface by providing a >> different name for each one (I think of this as a namespace). >> >> You can then get all of the utilities for that interface with > getUtilitiesFor. From docs: >>>>> sorted(components.getUtilitiesFor(tests.I2)) >> >> [(u'', U12(2)), (u'three', U12(3))] >> >> In that example, ``components`` could be obtained as follows: >> >> from zope.component import getSiteManager >> components = getSiteManager() > > Another possibility is to use subscriptions. You can register components for > the IBuildFarmJob interface and get all the registered subscribers.
Absolutely. FWIW, I don't like subscription adapters because their functionality can be essentially duplicated in the way I described, with named utilities. I'm trying to reduce the number of things to learn about in Zope's Component Architecture in zope-dev. So I don't recommend them...but that's just me. :-) Gary _______________________________________________ Mailing list: https://launchpad.net/~launchpad-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~launchpad-dev More help : https://help.launchpad.net/ListHelp
