The vrrp patch series would be a good example.
http://thread.gmane.org/gmane.network.ryu.devel/2557
thanks,
On Wed, Jun 12, 2013 at 04:18:17PM +0200, Philipp Aeschlimann wrote:
> Hey there
>
> Whats the right way to implement a custom-Event between two app's?
> That's the way I have done this:
>
> ### file: ryu/app/app_one.py ###
> import ryu.app.AppOne
> ...
>
> class EventAppOne(event.EventBase):
> def __init__ ...
> ...
>
> class AppOne(app_manager.RyuApp):
> def __init__ ...
> ...
> def foo(self, dp):
> self.send_event_to_observers(ryu.app.AppOne.EventAppOne(dp))
>
> ### file: ryu/app/app_two.py ###
> from ryu.app import AppOne
> ...
>
> class AppTwo(app_manager.RyuApp):
> def __init__ ...
> ...
> @set_ev_cls(AppOne.EventAppOne)
> def bar(self, ev):
> ...
>
> The Problem is in the app_manager.py (or I do not understand how to
> implement events is the reason...) in the method:
>
> def get_observers(self, ev, state):
> observers = []
> for k, v in self.observers.get(ev.__class__, {}).iteritems():
> if not state or not v or state in v:
> observers.append(k)
>
> If you send the event to the oveservers as follows:
>
> self.send_event_to_observers(EventAppOne(dp))
>
> then the attribute ev.__class__ in def get_observers(self, ev, state)
> contains the key "AppOne.EventAppOne" but in the observers dict is the
> key "ryu.app.AppOne.EventAppOne". So the event is not thrown.
>
> If you send the event like this (and described before):
>
> self.send_event_to_observers(ryu.app.AppOne.EventAppOne(dp))
>
> then the attribute ev.__class__ in def get_observers(self, ev, state)
> contains the right value that is "ryu.app.AppOne.EventAppOne" which is
> the same as the key in observers dict and the event is thrown.
>
> I hope I explained it correctly.
>
> g *pae
>
> --
> ZHAW - Zurich University of Applied Sciences
> Institute of Applied Information Technology InIT
> InIT Cloud Computing Laboratory ICCLab
>
> Philipp Aeschlimann
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yamahata
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