Current File : //proc/self/root/opt/alt/python35/lib64/python3.5/site-packages/aiohttp/signals.py
from aiohttp.frozenlist import FrozenList
__all__ = ('Signal',)
class Signal(FrozenList):
"""Coroutine-based signal implementation.
To connect a callback to a signal, use any list method.
Signals are fired using the send() coroutine, which takes named
arguments.
"""
__slots__ = ('_owner',)
def __init__(self, owner):
super().__init__()
self._owner = owner
def __repr__(self):
return '<Signal owner={}, frozen={}, {!r}>'.format(self._owner,
self.frozen,
list(self))
async def send(self, *args, **kwargs):
"""
Sends data to all registered receivers.
"""
if not self.frozen:
raise RuntimeError("Cannot send non-frozen signal.")
for receiver in self:
await receiver(*args, **kwargs)
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