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Fix notifier leak

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This commit is contained in:
Erik Johnston 2015-06-18 11:36:26 +01:00
parent bc42ca121f
commit 050ebccf30
1 changed files with 20 additions and 21 deletions
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41
synapse/notifier.py
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@ -308,49 +308,48 @@ class Notifier(object):
else: else:
current_token = user_stream.current_token current_token = user_stream.current_token
listener = [_NotificationListener(deferred)] result = None
if timeout and not current_token.is_after(from_token):
user_stream.listeners.add(listener[0])
if current_token.is_after(from_token): if current_token.is_after(from_token):
result = yield callback(from_token, current_token) result = yield callback(from_token, current_token)
else:
result = None
timer = [None]
if result: if result:
user_stream.listeners.discard(listener[0])
defer.returnValue(result) defer.returnValue(result)
return
if timeout: if timeout:
timer = [None]
listeners = []
timed_out = [False] timed_out = [False]
def notify_listeners():
user_stream.listeners.difference_update(listeners)
for listener in listeners:
listener.notify(current_token)
del listeners[:]
def _timeout_listener(): def _timeout_listener():
timed_out[0] = True timed_out[0] = True
timer[0] = None timer[0] = None
user_stream.listeners.discard(listener[0]) notify_listeners()
listener[0].notify(current_token)
# We create multiple notification listeners so we have to manage # We create multiple notification listeners so we have to manage
# canceling the timeout ourselves. # canceling the timeout ourselves.
timer[0] = self.clock.call_later(timeout/1000., _timeout_listener) timer[0] = self.clock.call_later(timeout/1000., _timeout_listener)
while not result and not timed_out[0]: while not result and not timed_out[0]:
new_token = yield deferred
deferred = defer.Deferred() deferred = defer.Deferred()
listener[0] = _NotificationListener(deferred) notify_listeners()
user_stream.listeners.add(listener[0]) listeners.append(_NotificationListener(deferred))
user_stream.listeners.update(listeners)
new_token = yield deferred
result = yield callback(current_token, new_token) result = yield callback(current_token, new_token)
current_token = new_token current_token = new_token
if timer[0] is not None: if timer[0] is not None:
try: try:
self.clock.cancel_call_later(timer[0]) self.clock.cancel_call_later(timer[0])
except: except:
logger.exception("Failed to cancel notifer timer") logger.exception("Failed to cancel notifer timer")
defer.returnValue(result) defer.returnValue(result)