Francis J. Lacoste wrote: > On December 2, 2009, Gary Poster wrote: >> 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. >> :-) > > Then what Gary says :-)
Thanking you both for the great advice :) Best regards -- Muharem Hrnjadovic <[email protected]> Public key id : B2BBFCFC Key fingerprint : A5A3 CC67 2B87 D641 103F 5602 219F 6B60 B2BB FCFC
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