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Pull out the 'get_rooms_for_user' cache logic into a reüsable @cached decorator
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@ -33,6 +33,32 @@ RoomsForUser = namedtuple(
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)
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# TODO(paul):
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# * Move this somewhere higher-level, shared;
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# * more generic key management
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# * export monitoring stats
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# * maximum size; just evict things at random, or consider LRU?
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def cached(orig):
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cache = {}
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@defer.inlineCallbacks
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def wrapped(self, key):
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if key in cache:
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defer.returnValue(cache[key])
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ret = yield orig(self, key)
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cache[key] = ret;
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defer.returnValue(ret)
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def invalidate(key):
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if key in cache:
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del cache[key]
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wrapped.invalidate = invalidate
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return wrapped
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class RoomMemberStore(SQLBaseStore):
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def __init__(self, *args, **kw):
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@ -103,7 +129,7 @@ class RoomMemberStore(SQLBaseStore):
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txn.execute(sql, (event.room_id, domain))
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self.invalidate_rooms_for_user(target_user_id)
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self.get_rooms_for_user.invalidate(target_user_id)
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@defer.inlineCallbacks
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def get_room_member(self, user_id, room_id):
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@ -247,33 +273,12 @@ class RoomMemberStore(SQLBaseStore):
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results = self._parse_events_txn(txn, rows)
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return results
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# TODO(paul): Create a nice @cached decorator to do this
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# @cached
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# def get_foo(...)
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# ...
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# invalidate_foo = get_foo.invalidator
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@defer.inlineCallbacks
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@cached
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def get_rooms_for_user(self, user_id):
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# TODO(paul): put some performance counters in here so we can easily
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# track what impact this cache is having
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if user_id in self._user_rooms_cache:
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defer.returnValue(self._user_rooms_cache[user_id])
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rooms = yield self.get_rooms_for_user_where_membership_is(
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return self.get_rooms_for_user_where_membership_is(
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user_id, membership_list=[Membership.JOIN],
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)
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# TODO(paul): Consider applying a maximum size; just evict things at
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# random, or consider LRU?
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self._user_rooms_cache[user_id] = rooms
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defer.returnValue(rooms)
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def invalidate_rooms_for_user(self, user_id):
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if user_id in self._user_rooms_cache:
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del self._user_rooms_cache[user_id]
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@defer.inlineCallbacks
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def user_rooms_intersect(self, user_id_list):
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""" Checks whether all the users whose IDs are given in a list share a
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