I would appreciate some confirmation/explanation on the Pyramid event system -- is event/subscribe restricted to Pyramid running on one physical server?
Thanks. Jerry On Dec 14, 7:13 am, John Anderson <son...@gmail.com> wrote: > On Tue, Dec 13, 2011 at 5:10 PM, Vlad K. <v...@haronmedia.com> wrote: > > > Hi all! > > > In my Pyramid app I want to implement an event system, basically for > > plugins to hook to various events that raise in the life of the > > application. These events are each different, some allow one hook (by > > raising an exception if another hook tries to register for same event), > > some many, they handle various kinds of data, etc... My approach is the > > following: > > > class SomeEvent(EventBase): > > """Event raised in this or that condition, does X, requires Y, ...""" > > HANDLERS = [] > > > @classmethod > > Register(cls, callable): > > """Decorator that registers a handler for this event.""" > > cls.HANDLERS.append(callable) > > return callable > > > def __init__(self, request): > > self.request = request > > ... > > > def dispatch(self): > > for h in self.HANDLERS: > > h(self) > > ... > > > @events.SomeEvent.Register > > def some_handler(event): > > ... > > > So basically we have a plugin with a handler some_handler, which we > > register for the particular event via its decorator. Now, I don't want to > > reinvent the wheel, and this approach seems rather straightforward, > > unit-testable and simple to implement, plus the events are then > > self-documenting. I was wondering if there is a better solution, or perhaps > > I can reuse some part of the Pyramid framework? ZCL? > > > Also, can I reuse Venusian to scan the plugins package and thus do "auto > > import" of plugins at app startup time, instead of having the requirement > > to manually import each plugin so that the decorators would trigger and > > register the handlers (I really want the "plug and play" solution with > > dropping a module in the plugins package dir and calling it done)? > > > Thanks. > > You can > use:http://docs.pylonsproject.org/projects/pyramid/en/latest/api/events.html > > this is how you would create custom > events:https://github.com/sontek/pyramid_signup/blob/master/pyramid_signup/e... > > this is how you would fire the > event:https://github.com/sontek/pyramid_signup/blob/master/pyramid_signup/v... > > and this is how you would subscribe to the > event:https://github.com/sontek/pyramid_signup/blob/master/pyramid_signup/t... -- You received this message because you are subscribed to the Google Groups "pylons-discuss" group. To post to this group, send email to pylons-discuss@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
