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Refactor the notifier.wait_for_events code to be clearer. Add _NotifierUserStream.new_listener that accpets a token to avoid races.

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This commit is contained in:
Erik Johnston 2015-06-18 15:49:05 +01:00
parent 050ebccf30
commit 22049ea700
3 changed files with 72 additions and 69 deletions
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13
synapse/util/async.py
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@ -45,7 +45,7 @@ class ObservableDeferred(object):
def __init__(self, deferred, consumeErrors=False):
object.__setattr__(self, "_deferred", deferred)
object.__setattr__(self, "_result", None)
object.__setattr__(self, "_observers", [])
object.__setattr__(self, "_observers", set())
def callback(r):
self._result = (True, r)
@ -74,12 +74,21 @@ class ObservableDeferred(object):
def observe(self):
if not self._result:
d = defer.Deferred()
self._observers.append(d)
def remove(r):
self._observers.discard(d)
return r
d.addBoth(remove)
self._observers.add(d)
return d
else:
success, res = self._result
return defer.succeed(res) if success else defer.fail(res)
def observers(self):
return self._observers
def __getattr__(self, name):
return getattr(self._deferred, name)