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RyuApp.get_handlers: restructure code and add a comment

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no functional changes.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
YAMAMOTO Takashi 2014-03-26 13:04:16 +09:00 committed by FUJITA Tomonori
parent 6ccec65aaf
commit b75cd0c0bd
1 changed files with 19 additions and 4 deletions
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23
ryu/base/app_manager.py
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@ -176,13 +176,28 @@ class RyuApp(object):
observers.pop(name, None)
def get_handlers(self, ev, state=None):
handlers = self.event_handlers.get(ev.__class__, [])
"""Returns a list of handlers for the specific event.
:param ev: The event to handle.
:param state: The current state. ("dispatcher")
If None is given, returns all handlers for the event.
Otherwise, returns only handlers that are interested
in the specified state.
The default is None.
"""
ev_cls = ev.__class__
handlers = self.event_handlers.get(ev_cls, [])
if state is None:
return handlers
dispatchers = lambda x: x.callers[ev.__class__].dispatchers
return [handler for handler in handlers
if not dispatchers(handler) or state in dispatchers(handler)]
def test(h):
states = h.callers[ev_cls].dispatchers
if not states:
# empty states means all states
return True
return state in states
return filter(test, handlers)
def get_observers(self, ev, state):
observers = []