Hi,
I'm a new for ryu controller.
I am trying to understand the code of simple_switch_13.py.
But I have some problems about this simple file,
1) I cannot understand the decorator how to work, just like the follow code:
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)def
_switch_features_handler(self, ev):
datapath = ev.msg.datapath
....
2) Why the function is represented register an event? How does it work?
def _set_ev_cls_dec111(handler):
if 'callers' not in dir(handler):
handler.callers = {}
for e in _listify(ev_cls):
handler.callers[e] = _Caller(_listify(dispatchers),
e.__module__)
return handler
return _set_ev_cls_dec
Could you please kindly tell me above two question?
Could you please use some simple instances to explain the question?
Thank you very much for your kindly help.
--
Sincerely,
Andy Shen
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