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Merge branch 'bugs/SYN-264' into develop

This commit is contained in:
Paul "LeoNerd" Evans 2015-02-11 16:23:30 +00:00
commit b164e0896c

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@ -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.
@ -240,28 +247,53 @@ 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],
)
# TODO(paul): Consider applying a maximum size; just evict things at
# random, or consider LRU?
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. As such, it is implemented locally by
wrapping logic around heavily-cached database queries.
"""
def interaction(txn):
user_list_clause = " OR ".join(["m.user_id = ?"] * len(user_id_list))
sql = (
"SELECT m.room_id FROM room_memberships as m "
"INNER JOIN current_state_events as c "
"ON m.event_id = c.event_id "
"WHERE m.membership = 'join' "
"AND (%(clause)s) "
# TODO(paul): We've got duplicate rows in the database somewhere
# so we have to DISTINCT m.user_id here
"GROUP BY m.room_id HAVING COUNT(DISTINCT m.user_id) = ?"
) % {"clause": user_list_clause}
if len(user_id_list) < 2:
defer.returnValue(True)
args = list(user_id_list)
args.append(len(user_id_list))
deferreds = [self.get_rooms_for_user(u) for u in user_id_list]
txn.execute(sql, args)
results = yield defer.DeferredList(deferreds)
return len(txn.fetchall()) > 0
# A list of sets of strings giving room IDs for each user
room_id_lists = [set([r.room_id for r in result[1]]) for result in results]
return self.runInteraction("user_rooms_intersect", interaction)
# There isn't a setintersection(*list_of_sets)
ret = len(room_id_lists.pop(0).intersection(*room_id_lists)) > 0
defer.returnValue(ret)