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Make /events always return a newer token, if one exists
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1 changed files with 10 additions and 9 deletions
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@ -22,6 +22,8 @@ from synapse.util.async import run_on_reactor, ObservableDeferred
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from synapse.types import StreamToken
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import synapse.metrics
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from collections import namedtuple
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import logging
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@ -118,6 +120,11 @@ class _NotifierUserStream(object):
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return _NotificationListener(self.notify_deferred.observe())
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class EventStreamResult(namedtuple("EventStreamResult", ("events", "tokens"))):
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def __nonzero__(self):
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return bool(self.events)
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class Notifier(object):
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""" This class is responsible for notifying any listeners when there are
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new events available for it.
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@ -356,7 +363,7 @@ class Notifier(object):
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@defer.inlineCallbacks
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def check_for_updates(before_token, after_token):
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if not after_token.is_after(before_token):
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defer.returnValue(None)
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defer.returnValue(EventStreamResult([], (before_token, before_token)))
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events = []
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end_token = from_token
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@ -372,7 +379,7 @@ class Notifier(object):
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new_events, new_key = yield source.get_new_events(
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user=user,
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from_key=getattr(from_token, keyname),
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limit=limit,
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limit=max(limit * 2, 10),
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is_guest=is_peeking,
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room_ids=room_ids,
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)
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@ -388,10 +395,7 @@ class Notifier(object):
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events.extend(new_events)
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end_token = end_token.copy_and_replace(keyname, new_key)
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if events:
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defer.returnValue((events, (from_token, end_token)))
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else:
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defer.returnValue(None)
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defer.returnValue(EventStreamResult(events, (from_token, end_token)))
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user_id_for_stream = user.to_string()
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if is_peeking:
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@ -415,9 +419,6 @@ class Notifier(object):
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from_token=from_token,
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)
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if result is None:
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result = ([], (from_token, from_token))
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defer.returnValue(result)
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@defer.inlineCallbacks
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