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Make /events always return a newer token, if one exists

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This commit is contained in:
Erik Johnston 2016-01-29 15:21:38 +00:00
parent ebc5f00efe
commit 4a6eb5eb45
1 changed files with 10 additions and 9 deletions
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19
synapse/notifier.py
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@ -22,6 +22,8 @@ from synapse.util.async import run_on_reactor, ObservableDeferred
from synapse.types import StreamToken
import synapse.metrics
from collections import namedtuple
import logging
@ -118,6 +120,11 @@ class _NotifierUserStream(object):
return _NotificationListener(self.notify_deferred.observe())
class EventStreamResult(namedtuple("EventStreamResult", ("events", "tokens"))):
def __nonzero__(self):
return bool(self.events)
class Notifier(object):
""" This class is responsible for notifying any listeners when there are
new events available for it.
@ -356,7 +363,7 @@ class Notifier(object):
@defer.inlineCallbacks
def check_for_updates(before_token, after_token):
if not after_token.is_after(before_token):
defer.returnValue(None)
defer.returnValue(EventStreamResult([], (before_token, before_token)))
events = []
end_token = from_token
@ -372,7 +379,7 @@ class Notifier(object):
new_events, new_key = yield source.get_new_events(
user=user,
from_key=getattr(from_token, keyname),
limit=limit,
limit=max(limit * 2, 10),
is_guest=is_peeking,
room_ids=room_ids,
)
@ -388,10 +395,7 @@ class Notifier(object):
events.extend(new_events)
end_token = end_token.copy_and_replace(keyname, new_key)
if events:
defer.returnValue((events, (from_token, end_token)))
else:
defer.returnValue(None)
defer.returnValue(EventStreamResult(events, (from_token, end_token)))
user_id_for_stream = user.to_string()
if is_peeking:
@ -415,9 +419,6 @@ class Notifier(object):
from_token=from_token,
)
if result is None:
result = ([], (from_token, from_token))
defer.returnValue(result)
@defer.inlineCallbacks