64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
|
class CallLaterManager(object):
|
||
|
|
_callLater = None
|
||
|
|
_pendingCallLaters = []
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _cancel(cls, call_later):
|
||
|
|
"""
|
||
|
|
:param call_later: DelayedCall
|
||
|
|
:return: (callable) canceller function
|
||
|
|
"""
|
||
|
|
|
||
|
|
def cancel(reason=None):
|
||
|
|
"""
|
||
|
|
:param reason: reason for cancellation, this is returned after cancelling the DelayedCall
|
||
|
|
:return: reason
|
||
|
|
"""
|
||
|
|
|
||
|
|
if call_later.active():
|
||
|
|
call_later.cancel()
|
||
|
|
cls._pendingCallLaters.remove(call_later)
|
||
|
|
return reason
|
||
|
|
return cancel
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def stop(cls):
|
||
|
|
"""
|
||
|
|
Cancel any callLaters that are still running
|
||
|
|
"""
|
||
|
|
|
||
|
|
from twisted.internet import defer
|
||
|
|
while cls._pendingCallLaters:
|
||
|
|
canceller = cls._cancel(cls._pendingCallLaters[0])
|
||
|
|
try:
|
||
|
|
canceller()
|
||
|
|
except (defer.CancelledError, defer.AlreadyCalledError):
|
||
|
|
pass
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def call_later(cls, when, what, *args, **kwargs):
|
||
|
|
"""
|
||
|
|
Schedule a call later and get a canceller callback function
|
||
|
|
|
||
|
|
:param when: (float) delay in seconds
|
||
|
|
:param what: (callable)
|
||
|
|
:param args: (*tuple) args to be passed to the callable
|
||
|
|
:param kwargs: (**dict) kwargs to be passed to the callable
|
||
|
|
|
||
|
|
:return: (tuple) twisted.internet.base.DelayedCall object, canceller function
|
||
|
|
"""
|
||
|
|
|
||
|
|
call_later = cls._callLater(when, what, *args, **kwargs)
|
||
|
|
canceller = cls._cancel(call_later)
|
||
|
|
cls._pendingCallLaters.append(call_later)
|
||
|
|
return call_later, canceller
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def setup(cls, callLater):
|
||
|
|
"""
|
||
|
|
Setup the callLater function to use, supports the real reactor as well as task.Clock
|
||
|
|
|
||
|
|
:param callLater: (IReactorTime.callLater)
|
||
|
|
"""
|
||
|
|
cls._callLater = callLater
|