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Remove unused wait_for_replication method

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I guess this was used once? It's not now, anyway.
This commit is contained in:
Richard van der Hoff 2019-03-04 18:27:32 +00:00
parent 8e28bc5eee
commit daa10e3e66
1 changed files with 0 additions and 50 deletions
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50
synapse/notifier.py
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@ -178,8 +178,6 @@ class Notifier(object):
self.remove_expired_streams, self.UNUSED_STREAM_EXPIRY_MS self.remove_expired_streams, self.UNUSED_STREAM_EXPIRY_MS
) )
self.replication_deferred = ObservableDeferred(defer.Deferred())
# This is not a very cheap test to perform, but it's only executed # This is not a very cheap test to perform, but it's only executed
# when rendering the metrics page, which is likely once per minute at # when rendering the metrics page, which is likely once per minute at
# most when scraping it. # most when scraping it.
@ -518,10 +516,6 @@ class Notifier(object):
def notify_replication(self): def notify_replication(self):
"""Notify the any replication listeners that there's a new event""" """Notify the any replication listeners that there's a new event"""
with PreserveLoggingContext(): with PreserveLoggingContext():
deferred = self.replication_deferred
self.replication_deferred = ObservableDeferred(defer.Deferred())
deferred.callback(None)
# the callbacks may well outlast the current request, so we run # the callbacks may well outlast the current request, so we run
# them in the sentinel logcontext. # them in the sentinel logcontext.
# #
@ -530,47 +524,3 @@ class Notifier(object):
# accordingly, but that requires more changes) # accordingly, but that requires more changes)
for cb in self.replication_callbacks: for cb in self.replication_callbacks:
cb() cb()
@defer.inlineCallbacks
def wait_for_replication(self, callback, timeout):
"""Wait for an event to happen.
Args:
callback: Gets called whenever an event happens. If this returns a
truthy value then ``wait_for_replication`` returns, otherwise
it waits for another event.
timeout: How many milliseconds to wait for callback return a truthy
value.
Returns:
A deferred that resolves with the value returned by the callback.
"""
listener = _NotificationListener(None)
end_time = self.clock.time_msec() + timeout
while True:
listener.deferred = self.replication_deferred.observe()
result = yield callback()
if result:
break
now = self.clock.time_msec()
if end_time <= now:
break
listener.deferred = timeout_deferred(
listener.deferred,
timeout=(end_time - now) / 1000.,
reactor=self.hs.get_reactor(),
)
try:
with PreserveLoggingContext():
yield listener.deferred
except defer.TimeoutError:
break
except defer.CancelledError:
break
defer.returnValue(result)