Provide "Subscriber" base class

[Christian Zagrodnick]

Subscribers can only be created with the @subscribe deswcriptor. It would be nice to also be able to create subscriber classes like:

class MySub(Subscriber):

    provides(…)
    adapts(…)

[Christian Klinger (cklinger)]

Christian can you explain why you want it? What are the advantages of it?

[Christian Zagrodnick (zagy)]

For instance I want to write a z3c.traverser.interfaces.IPluggableTraverser.

That's a class which is registered as a subscriber. I know I could write a specialized grokker for that, but it seems like a generic pattern to create subscribers which are classes.

[Jan Wijbrand Kolman (janwijbrand)]

i think this is implemented now as Subscription (and MultiSubscription) components in grokcore.component.