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Change the way we figure out presence updates for small deltas

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This commit is contained in:
Erik Johnston 2016-02-23 14:48:23 +00:00
parent 02e928cf9b
commit c77dae7a1a
2 changed files with 52 additions and 17 deletions
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25
synapse/handlers/presence.py
View File

@ -845,11 +845,31 @@ class PresenceEventSource(object):
room_ids = room_ids or []
presence = self.hs.get_handlers().presence_handler
stream_change_cache = self.store.presence_stream_cache
if not room_ids:
rooms = yield self.store.get_rooms_for_user(user_id)
room_ids = set(e.room_id for e in rooms)
else:
room_ids = set(room_ids)
plist = yield self.store.get_presence_list_accepted(user.localpart)
friends = set(row["observed_user_id"] for row in plist)
friends.add(user_id) # So that we receive our own presence
user_ids_changed = set()
if from_key and from_key < 100:
changed = stream_change_cache.get_all_entities_changed(from_key)
for other_user_id in changed:
if other_user_id in friends:
user_ids_changed.add(other_user_id)
continue
other_rooms = yield self.store.get_rooms_for_user(other_user_id)
if room_ids.intersection(e.room_id for e in other_rooms):
user_ids_changed.add(other_user_id)
continue
else:
user_ids_to_check = set()
for room_id in room_ids:
users = yield self.store.get_users_in_room(room_id)
@ -862,10 +882,8 @@ class PresenceEventSource(object):
# not in any rooms, but still.
user_ids_to_check.add(user_id)
max_token = self.store.get_current_presence_token()
if from_key:
user_ids_changed = self.store.presence_stream_cache.get_entities_changed(
user_ids_changed = stream_change_cache.get_entities_changed(
user_ids_to_check, from_key,
)
else:
@ -873,6 +891,7 @@ class PresenceEventSource(object):
updates = yield presence.current_state_for_users(user_ids_changed)
max_token = self.store.get_current_presence_token()
now = self.clock.time_msec()
defer.returnValue(([

16
synapse/util/caches/stream_change_cache.py
View File

@ -85,6 +85,22 @@ class StreamChangeCache(object):
return result
def get_all_entities_changed(self, stream_pos):
"""Returns all entites that have had new things since the given
position. If the position is too old it will return None.
"""
assert type(stream_pos) is int
if stream_pos >= self._earliest_known_stream_pos:
keys = self._cache.keys()
i = keys.bisect_right(stream_pos)
return (
self._cache[k] for k in keys[i:]
)
else:
return None
def entity_has_changed(self, entity, stream_pos):
"""Informs the cache that the entity has been changed at the given
position.