mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-27 20:52:30 +00:00
Cache the result of a get_rooms_for_user query, to make user_rooms_intersect() much lighter in the read-common case
This commit is contained in:
parent
7be0f6594e
commit
45b56609ae
@ -35,6 +35,11 @@ RoomsForUser = namedtuple(
|
||||
|
||||
class RoomMemberStore(SQLBaseStore):
|
||||
|
||||
def __init__(self, *args, **kw):
|
||||
super(RoomMemberStore, self).__init__(*args, **kw)
|
||||
|
||||
self._user_rooms_cache = {}
|
||||
|
||||
def _store_room_member_txn(self, txn, event):
|
||||
"""Store a room member in the database.
|
||||
"""
|
||||
@ -98,6 +103,8 @@ class RoomMemberStore(SQLBaseStore):
|
||||
|
||||
txn.execute(sql, (event.room_id, domain))
|
||||
|
||||
self.invalidate_rooms_for_user(target_user_id)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def get_room_member(self, user_id, room_id):
|
||||
"""Retrieve the current state of a room member.
|
||||
@ -240,23 +247,43 @@ class RoomMemberStore(SQLBaseStore):
|
||||
results = self._parse_events_txn(txn, rows)
|
||||
return results
|
||||
|
||||
# TODO(paul): Create a nice @cached decorator to do this
|
||||
# @cached
|
||||
# def get_foo(...)
|
||||
# ...
|
||||
# invalidate_foo = get_foo.invalidator
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def get_rooms_for_user(self, user_id):
|
||||
# TODO(paul): put some performance counters in here so we can easily
|
||||
# track what impact this cache is having
|
||||
if user_id in self._user_rooms_cache:
|
||||
defer.returnValue(self._user_rooms_cache[user_id])
|
||||
|
||||
rooms = yield self.get_rooms_for_user_where_membership_is(
|
||||
user_id, membership_list=[Membership.JOIN],
|
||||
)
|
||||
|
||||
self._user_rooms_cache[user_id] = rooms
|
||||
defer.returnValue(rooms)
|
||||
|
||||
def invalidate_rooms_for_user(self, user_id):
|
||||
if user_id in self._user_rooms_cache:
|
||||
del self._user_rooms_cache[user_id]
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def user_rooms_intersect(self, user_id_list):
|
||||
""" Checks whether all the users whose IDs are given in a list share a
|
||||
room.
|
||||
|
||||
This is a "hot path" function that's called a lot, e.g. by presence for
|
||||
generating the event stream.
|
||||
generating the event stream. As such, it is implemented locally by
|
||||
wrapping logic around heavily-cached database queries.
|
||||
"""
|
||||
if len(user_id_list) < 2:
|
||||
defer.returnValue(True)
|
||||
|
||||
deferreds = [
|
||||
self.get_rooms_for_user_where_membership_is(
|
||||
u, membership_list=[Membership.JOIN],
|
||||
)
|
||||
for u in user_id_list
|
||||
]
|
||||
deferreds = [self.get_rooms_for_user(u) for u in user_id_list]
|
||||
|
||||
results = yield defer.DeferredList(deferreds)
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user