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events: add function to remove event handlers

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Event handlers for remote mgmt API will be registered dynamically, so
allow to unregister them.

QubesOS/qubes-issues#2622
This commit is contained in:
Marek Marczykowski-Górecki 2017-04-10 00:50:18 +02:00
parent 68c8d219c9
commit ee967c1e72
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1 changed files with 11 additions and 0 deletions
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qubes/events.py
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@ -115,6 +115,17 @@ class Emitter(object, metaclass=EmitterMeta):
# pylint: disable=no-member # pylint: disable=no-member
cls.__handlers__[event].add(func) cls.__handlers__[event].add(func)
@classmethod
def remove_handler(cls, event, func):
'''Remove event handler from subject's class.
:param str event: event identificator
:param collections.Callable handler: handler callable
'''
# pylint: disable=no-member
cls.__handlers__[event].remove(func)
def _fire_event_in_order(self, order, event, kwargs): def _fire_event_in_order(self, order, event, kwargs):
'''Fire event for classes in given order. '''Fire event for classes in given order.