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Use wait_for_events to implement 'get_events'

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This commit is contained in:
Mark Haines 2015-05-11 14:37:33 +01:00
parent d244fa9741
commit 5e3b254dc8
1 changed files with 33 additions and 82 deletions
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111
synapse/notifier.py
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@ -305,14 +305,16 @@ class Notifier(object):
)
@defer.inlineCallbacks
def wait_for_events(self, user, rooms, filter, timeout, callback):
def wait_for_events(self, user, rooms, timeout, callback,
from_token=StreamToken("s0", "0", "0")):
"""Wait until the callback returns a non empty response or the
timeout fires.
"""
deferred = defer.Deferred()
from_token = StreamToken("s0", "0", "0")
appservice = yield self.hs.get_datastore().get_app_service_by_user_id(
user.to_string()
)
listener = [_NotificationListener(
user=user,
@ -321,6 +323,7 @@ class Notifier(object):
limit=1,
timeout=timeout,
deferred=deferred,
appservice=appservice,
)]
if timeout:
@ -363,65 +366,43 @@ class Notifier(object):
defer.returnValue(result)
@defer.inlineCallbacks
def get_events_for(self, user, rooms, pagination_config, timeout):
""" For the given user and rooms, return any new events for them. If
there are no new events wait for up to `timeout` milliseconds for any
new events to happen before returning.
"""
deferred = defer.Deferred()
self._get_events(
deferred, user, rooms, pagination_config.from_token,
pagination_config.limit, timeout
).addErrback(deferred.errback)
return deferred
@defer.inlineCallbacks
def _get_events(self, deferred, user, rooms, from_token, limit, timeout):
from_token = pagination_config.from_token
if not from_token:
from_token = yield self.event_sources.get_current_token()
appservice = yield self.hs.get_datastore().get_app_service_by_user_id(
user.to_string()
limit = pagination_config.limit
@defer.inlineCallbacks
def check_for_updates():
events = []
end_token = from_token
for name, source in self.event_sources.sources.items():
keyname = "%s_key" % name
stuff, new_key = yield source.get_new_events_for_user(
user, getattr(from_token, keyname), limit,
)
events.extend(stuff)
end_token = from_token.copy_and_replace(keyname, new_key)
listener = _NotificationListener(
user,
rooms,
from_token,
limit,
timeout,
deferred,
appservice=appservice
)
def _timeout_listener():
# TODO (erikj): We should probably set to_token to the current
# max rather than reusing from_token.
# Remove the timer from the listener so we don't try to cancel it.
listener.timer = None
listener.notify(
self,
[],
listener.from_token,
listener.from_token,
)
if timeout:
self._register_with_keys(listener)
yield self._check_for_updates(listener)
if not timeout:
_timeout_listener()
if events:
defer.returnValue((events, (from_token, end_token)))
else:
# Only add the timer if the listener hasn't been notified
if not listener.notified():
listener.timer = self.clock.call_later(
timeout/1000.0, _timeout_listener
defer.returnValue(None)
result = yield self.wait_for_events(
user, rooms, timeout, check_for_updates, from_token=from_token
)
return
if result is None:
result = ([], (from_token, from_token))
defer.returnValue(result)
@log_function
def _register_with_keys(self, listener):
@ -436,36 +417,6 @@ class Notifier(object):
listener.appservice, set()
).add(listener)
@defer.inlineCallbacks
@log_function
def _check_for_updates(self, listener):
# TODO (erikj): We need to think about limits across multiple sources
events = []
from_token = listener.from_token
limit = listener.limit
# TODO (erikj): DeferredList?
for name, source in self.event_sources.sources.items():
keyname = "%s_key" % name
stuff, new_key = yield source.get_new_events_for_user(
listener.user,
getattr(from_token, keyname),
limit,
)
events.extend(stuff)
from_token = from_token.copy_and_replace(keyname, new_key)
end_token = from_token
if events:
listener.notify(self, events, listener.from_token, end_token)
defer.returnValue(listener)
def _user_joined_room(self, user, room_id):
new_listeners = self.user_to_listeners.get(user, set())