Merge branch 'develop' of github.com:matrix-org/synapse into erikj/backfill_fixes

21 files changed, 240 insertions, 119 deletions

diff --git a/synapse/__init__.py b/synapse/__init__.py
index 041e2151b0..68f86138a4 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -16,4 +16,4 @@
 """ This is a reference implementation of a Matrix home server.
 """
 
-__version__ = "0.9.0-r4"
+__version__ = "0.9.0-r5"
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index fa43211415..f3513abb55 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -277,9 +277,12 @@ class SynapseHomeServer(HomeServer):
                     config,
                     metrics_resource,
                 ),
-                interface="127.0.0.1",
+                interface=config.metrics_bind_host,
+            )
+            logger.info(
+                "Metrics now running on %s port %d",
+                config.metrics_bind_host, config.metrics_port,
             )
-            logger.info("Metrics now running on 127.0.0.1 port %d", config.metrics_port)
 
     def run_startup_checks(self, db_conn, database_engine):
         all_users_native = are_all_users_on_domain(
diff --git a/synapse/appservice/__init__.py b/synapse/appservice/__init__.py
index 63a18b802b..e3ca45de83 100644
--- a/synapse/appservice/__init__.py
+++ b/synapse/appservice/__init__.py
@@ -148,8 +148,8 @@ class ApplicationService(object):
                 and self.is_interested_in_user(event.state_key)):
             return True
         # check joined member events
-        for member in member_list:
-            if self.is_interested_in_user(member.state_key):
+        for user_id in member_list:
+            if self.is_interested_in_user(user_id):
                 return True
         return False
 
@@ -173,7 +173,7 @@ class ApplicationService(object):
             restrict_to(str): The namespace to restrict regex tests to.
             aliases_for_event(list): A list of all the known room aliases for
             this event.
-            member_list(list): A list of all joined room members in this room.
+            member_list(list): A list of all joined user_ids in this room.
         Returns:
             bool: True if this service would like to know about this event.
         """
diff --git a/synapse/config/metrics.py b/synapse/config/metrics.py
index 71a1b1d189..0cfb30ce7f 100644
--- a/synapse/config/metrics.py
+++ b/synapse/config/metrics.py
@@ -20,6 +20,7 @@ class MetricsConfig(Config):
     def read_config(self, config):
         self.enable_metrics = config["enable_metrics"]
         self.metrics_port = config.get("metrics_port")
+        self.metrics_bind_host = config.get("metrics_bind_host", "127.0.0.1")
 
     def default_config(self, config_dir_path, server_name):
         return """\
@@ -28,6 +29,9 @@ class MetricsConfig(Config):
         # Enable collection and rendering of performance metrics
         enable_metrics: False
 
-        # Separate port to accept metrics requests on (on localhost)
+        # Separate port to accept metrics requests on
         # metrics_port: 8081
+
+        # Which host to bind the metric listener to
+        # metrics_bind_host: 127.0.0.1
         """
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 2f2bf3a134..cbb9d354b6 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -194,6 +194,8 @@ class FederationClient(FederationBase):
             outlier (bool): Indicates whether the PDU is an `outlier`, i.e. if
                 it's from an arbitary point in the context as opposed to part
                 of the current block of PDUs. Defaults to `False`
+            timeout (int): How long to try (in ms) each destination for before
+                moving to the next destination. None indicates no timeout.
 
         Returns:
             Deferred: Results in the requested PDU.
diff --git a/synapse/federation/transaction_queue.py b/synapse/federation/transaction_queue.py
index ca04822fb3..32fa5e8c15 100644
--- a/synapse/federation/transaction_queue.py
+++ b/synapse/federation/transaction_queue.py
@@ -207,13 +207,13 @@ class TransactionQueue(object):
             # request at which point pending_pdus_by_dest just keeps growing.
             # we need application-layer timeouts of some flavour of these
             # requests
-            logger.info(
+            logger.debug(
                 "TX [%s] Transaction already in progress",
                 destination
             )
             return
 
-        logger.info("TX [%s] _attempt_new_transaction", destination)
+        logger.debug("TX [%s] _attempt_new_transaction", destination)
 
         # list of (pending_pdu, deferred, order)
         pending_pdus = self.pending_pdus_by_dest.pop(destination, [])
@@ -221,11 +221,11 @@ class TransactionQueue(object):
         pending_failures = self.pending_failures_by_dest.pop(destination, [])
 
         if pending_pdus:
-            logger.info("TX [%s] len(pending_pdus_by_dest[dest]) = %d",
-                        destination, len(pending_pdus))
+            logger.debug("TX [%s] len(pending_pdus_by_dest[dest]) = %d",
+                         destination, len(pending_pdus))
 
         if not pending_pdus and not pending_edus and not pending_failures:
-            logger.info("TX [%s] Nothing to send", destination)
+            logger.debug("TX [%s] Nothing to send", destination)
             return
 
         # Sort based on the order field
@@ -242,6 +242,8 @@ class TransactionQueue(object):
         try:
             self.pending_transactions[destination] = 1
 
+            txn_id = str(self._next_txn_id)
+
             limiter = yield get_retry_limiter(
                 destination,
                 self._clock,
@@ -249,9 +251,9 @@ class TransactionQueue(object):
             )
 
             logger.debug(
-                "TX [%s] Attempting new transaction"
+                "TX [%s] {%s} Attempting new transaction"
                 " (pdus: %d, edus: %d, failures: %d)",
-                destination,
+                destination, txn_id,
                 len(pending_pdus),
                 len(pending_edus),
                 len(pending_failures)
@@ -261,7 +263,7 @@ class TransactionQueue(object):
 
             transaction = Transaction.create_new(
                 origin_server_ts=int(self._clock.time_msec()),
-                transaction_id=str(self._next_txn_id),
+                transaction_id=txn_id,
                 origin=self.server_name,
                 destination=destination,
                 pdus=pdus,
@@ -275,9 +277,13 @@ class TransactionQueue(object):
 
             logger.debug("TX [%s] Persisted transaction", destination)
             logger.info(
-                "TX [%s] Sending transaction [%s]",
-                destination,
+                "TX [%s] {%s} Sending transaction [%s],"
+                " (PDUs: %d, EDUs: %d, failures: %d)",
+                destination, txn_id,
                 transaction.transaction_id,
+                len(pending_pdus),
+                len(pending_edus),
+                len(pending_failures),
             )
 
             with limiter:
@@ -313,7 +319,10 @@ class TransactionQueue(object):
                     code = e.code
                     response = e.response
 
-                logger.info("TX [%s] got %d response", destination, code)
+                logger.info(
+                    "TX [%s] {%s} got %d response",
+                    destination, txn_id, code
+                )
 
                 logger.debug("TX [%s] Sent transaction", destination)
                 logger.debug("TX [%s] Marking as delivered...", destination)
diff --git a/synapse/federation/transport/client.py b/synapse/federation/transport/client.py
index c2b53b78b2..610a4c3163 100644
--- a/synapse/federation/transport/client.py
+++ b/synapse/federation/transport/client.py
@@ -57,6 +57,8 @@ class TransportLayerClient(object):
             destination (str): The host name of the remote home server we want
                 to get the state from.
             event_id (str): The id of the event being requested.
+            timeout (int): How long to try (in ms) the destination for before
+                giving up. None indicates no timeout.
 
         Returns:
             Deferred: Results in a dict received from the remote homeserver.
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 2bfe0f3c9b..af87805f34 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -196,6 +196,14 @@ class FederationSendServlet(BaseFederationServlet):
                 transaction_id, str(transaction_data)
             )
 
+            logger.info(
+                "Received txn %s from %s. (PDUs: %d, EDUs: %d, failures: %d)",
+                transaction_id, origin,
+                len(transaction_data.get("pdus", [])),
+                len(transaction_data.get("edus", [])),
+                len(transaction_data.get("failures", [])),
+            )
+
             # We should ideally be getting this from the security layer.
             # origin = body["origin"]
 
diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py
index 355ab317df..8269482e47 100644
--- a/synapse/handlers/appservice.py
+++ b/synapse/handlers/appservice.py
@@ -15,7 +15,7 @@
 
 from twisted.internet import defer
 
-from synapse.api.constants import EventTypes, Membership
+from synapse.api.constants import EventTypes
 from synapse.appservice import ApplicationService
 from synapse.types import UserID
 
@@ -147,10 +147,7 @@ class ApplicationServicesHandler(object):
                 )
             # We need to know the members associated with this event.room_id,
             # if any.
-            member_list = yield self.store.get_room_members(
-                room_id=event.room_id,
-                membership=Membership.JOIN
-            )
+            member_list = yield self.store.get_users_in_room(event.room_id)
 
         services = yield self.store.get_app_services()
         interested_list = [
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 40794187b1..670c1d353f 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -146,6 +146,10 @@ class PresenceHandler(BaseHandler):
         self._user_cachemap = {}
         self._user_cachemap_latest_serial = 0
 
+        # map room_ids to the latest presence serial for a member of that
+        # room
+        self._room_serials = {}
+
         metrics.register_callback(
             "userCachemap:size",
             lambda: len(self._user_cachemap),
@@ -297,13 +301,34 @@ class PresenceHandler(BaseHandler):
 
         self.changed_presencelike_data(user, {"last_active": now})
 
+    def get_joined_rooms_for_user(self, user):
+        """Get the list of rooms a user is joined to.
+
+        Args:
+            user(UserID): The user.
+        Returns:
+            A Deferred of a list of room id strings.
+        """
+        rm_handler = self.homeserver.get_handlers().room_member_handler
+        return rm_handler.get_joined_rooms_for_user(user)
+
+    def get_joined_users_for_room_id(self, room_id):
+        rm_handler = self.homeserver.get_handlers().room_member_handler
+        return rm_handler.get_room_members(room_id)
+
+    @defer.inlineCallbacks
     def changed_presencelike_data(self, user, state):
-        statuscache = self._get_or_make_usercache(user)
+        """Updates the presence state of a local user.
 
+        Args:
+            user(UserID): The user being updated.
+            state(dict): The new presence state for the user.
+        Returns:
+            A Deferred
+        """
         self._user_cachemap_latest_serial += 1
-        statuscache.update(state, serial=self._user_cachemap_latest_serial)
-
-        return self.push_presence(user, statuscache=statuscache)
+        statuscache = yield self.update_presence_cache(user, state)
+        yield self.push_presence(user, statuscache=statuscache)
 
     @log_function
     def started_user_eventstream(self, user):
@@ -326,13 +351,12 @@ class PresenceHandler(BaseHandler):
             room_id(str): The room id the user joined.
         """
         if self.hs.is_mine(user):
-            statuscache = self._get_or_make_usercache(user)
-
             # No actual update but we need to bump the serial anyway for the
             # event source
             self._user_cachemap_latest_serial += 1
-            statuscache.update({}, serial=self._user_cachemap_latest_serial)
-
+            statuscache = yield self.update_presence_cache(
+                user, room_ids=[room_id]
+            )
             self.push_update_to_local_and_remote(
                 observed_user=user,
                 room_ids=[room_id],
@@ -340,16 +364,17 @@ class PresenceHandler(BaseHandler):
             )
 
         # We also want to tell them about current presence of people.
-        rm_handler = self.homeserver.get_handlers().room_member_handler
-        curr_users = yield rm_handler.get_room_members(room_id)
+        curr_users = yield self.get_joined_users_for_room_id(room_id)
 
         for local_user in [c for c in curr_users if self.hs.is_mine(c)]:
-            statuscache = self._get_or_offline_usercache(local_user)
-            statuscache.update({}, serial=self._user_cachemap_latest_serial)
+            statuscache = yield self.update_presence_cache(
+                local_user, room_ids=[room_id], add_to_cache=False
+            )
+
             self.push_update_to_local_and_remote(
                 observed_user=local_user,
                 users_to_push=[user],
-                statuscache=self._get_or_offline_usercache(local_user),
+                statuscache=statuscache,
             )
 
     @defer.inlineCallbacks
@@ -546,8 +571,7 @@ class PresenceHandler(BaseHandler):
 
             # Also include people in all my rooms
 
-            rm_handler = self.homeserver.get_handlers().room_member_handler
-            room_ids = yield rm_handler.get_joined_rooms_for_user(user)
+            room_ids = yield self.get_joined_rooms_for_user(user)
 
         if state is None:
             state = yield self.store.get_presence_state(user.localpart)
@@ -747,8 +771,7 @@ class PresenceHandler(BaseHandler):
         # and also user is informed of server-forced pushes
         localusers.add(user)
 
-        rm_handler = self.homeserver.get_handlers().room_member_handler
-        room_ids = yield rm_handler.get_joined_rooms_for_user(user)
+        room_ids = yield self.get_joined_rooms_for_user(user)
 
         if not localusers and not room_ids:
             defer.returnValue(None)
@@ -793,8 +816,7 @@ class PresenceHandler(BaseHandler):
                     " | %d interested local observers %r", len(observers), observers
                 )
 
-            rm_handler = self.homeserver.get_handlers().room_member_handler
-            room_ids = yield rm_handler.get_joined_rooms_for_user(user)
+            room_ids = yield self.get_joined_rooms_for_user(user)
             if room_ids:
                 logger.debug(" | %d interested room IDs %r", len(room_ids), room_ids)
 
@@ -813,10 +835,8 @@ class PresenceHandler(BaseHandler):
                     self.clock.time_msec() - state.pop("last_active_ago")
                 )
 
-            statuscache = self._get_or_make_usercache(user)
-
             self._user_cachemap_latest_serial += 1
-            statuscache.update(state, serial=self._user_cachemap_latest_serial)
+            yield self.update_presence_cache(user, state, room_ids=room_ids)
 
             if not observers and not room_ids:
                 logger.debug(" | no interested observers or room IDs")
@@ -875,6 +895,35 @@ class PresenceHandler(BaseHandler):
         yield defer.DeferredList(deferreds, consumeErrors=True)
 
     @defer.inlineCallbacks
+    def update_presence_cache(self, user, state={}, room_ids=None,
+                              add_to_cache=True):
+        """Update the presence cache for a user with a new state and bump the
+        serial to the latest value.
+
+        Args:
+            user(UserID): The user being updated
+            state(dict): The presence state being updated
+            room_ids(None or list of str): A list of room_ids to update. If
+                room_ids is None then fetch the list of room_ids the user is
+                joined to.
+            add_to_cache: Whether to add an entry to the presence cache if the
+                user isn't already in the cache.
+        Returns:
+            A Deferred UserPresenceCache for the user being updated.
+        """
+        if room_ids is None:
+            room_ids = yield self.get_joined_rooms_for_user(user)
+
+        for room_id in room_ids:
+            self._room_serials[room_id] = self._user_cachemap_latest_serial
+        if add_to_cache:
+            statuscache = self._get_or_make_usercache(user)
+        else:
+            statuscache = self._get_or_offline_usercache(user)
+        statuscache.update(state, serial=self._user_cachemap_latest_serial)
+        defer.returnValue(statuscache)
+
+    @defer.inlineCallbacks
     def push_update_to_local_and_remote(self, observed_user, statuscache,
                                         users_to_push=[], room_ids=[],
                                         remote_domains=[]):
@@ -997,38 +1046,10 @@ class PresenceEventSource(object):
         self.clock = hs.get_clock()
 
     @defer.inlineCallbacks
-    def is_visible(self, observer_user, observed_user):
-        if observer_user == observed_user:
-            defer.returnValue(True)
-
-        presence = self.hs.get_handlers().presence_handler
-
-        if (yield presence.store.user_rooms_intersect(
-                [u.to_string() for u in observer_user, observed_user])):
-            defer.returnValue(True)
-
-        if self.hs.is_mine(observed_user):
-            pushmap = presence._local_pushmap
-
-            defer.returnValue(
-                observed_user.localpart in pushmap and
-                observer_user in pushmap[observed_user.localpart]
-            )
-        else:
-            recvmap = presence._remote_recvmap
-
-            defer.returnValue(
-                observed_user in recvmap and
-                observer_user in recvmap[observed_user]
-            )
-
-    @defer.inlineCallbacks
     @log_function
     def get_new_events_for_user(self, user, from_key, limit):
         from_key = int(from_key)
 
-        observer_user = user
-
         presence = self.hs.get_handlers().presence_handler
         cachemap = presence._user_cachemap
 
@@ -1037,17 +1058,27 @@ class PresenceEventSource(object):
         clock = self.clock
         latest_serial = 0
 
+        user_ids_to_check = {user}
+        presence_list = yield presence.store.get_presence_list(
+            user.localpart, accepted=True
+        )
+        if presence_list is not None:
+            user_ids_to_check |= set(
+                UserID.from_string(p["observed_user_id"]) for p in presence_list
+            )
+        room_ids = yield presence.get_joined_rooms_for_user(user)
+        for room_id in set(room_ids) & set(presence._room_serials):
+            if presence._room_serials[room_id] > from_key:
+                joined = yield presence.get_joined_users_for_room_id(room_id)
+                user_ids_to_check |= set(joined)
+
         updates = []
-        # TODO(paul): use a DeferredList ? How to limit concurrency.
-        for observed_user in cachemap.keys():
+        for observed_user in user_ids_to_check & set(cachemap):
             cached = cachemap[observed_user]
 
             if cached.serial <= from_key or cached.serial > max_serial:
                 continue
 
-            if not (yield self.is_visible(observer_user, observed_user)):
-                continue
-
             latest_serial = max(cached.serial, latest_serial)
             updates.append(cached.make_event(user=observed_user, clock=clock))
 
@@ -1084,8 +1115,6 @@ class PresenceEventSource(object):
     def get_pagination_rows(self, user, pagination_config, key):
         # TODO (erikj): Does this make sense? Ordering?
 
-        observer_user = user
-
         from_key = int(pagination_config.from_key)
 
         if pagination_config.to_key:
@@ -1096,14 +1125,26 @@ class PresenceEventSource(object):
         presence = self.hs.get_handlers().presence_handler
         cachemap = presence._user_cachemap
 
+        user_ids_to_check = {user}
+        presence_list = yield presence.store.get_presence_list(
+            user.localpart, accepted=True
+        )
+        if presence_list is not None:
+            user_ids_to_check |= set(
+                UserID.from_string(p["observed_user_id"]) for p in presence_list
+            )
+        room_ids = yield presence.get_joined_rooms_for_user(user)
+        for room_id in set(room_ids) & set(presence._room_serials):
+            if presence._room_serials[room_id] >= from_key:
+                joined = yield presence.get_joined_users_for_room_id(room_id)
+                user_ids_to_check |= set(joined)
+
         updates = []
-        # TODO(paul): use a DeferredList ? How to limit concurrency.
-        for observed_user in cachemap.keys():
+        for observed_user in user_ids_to_check & set(cachemap):
             if not (to_key < cachemap[observed_user].serial <= from_key):
                 continue
 
-            if (yield self.is_visible(observer_user, observed_user)):
-                updates.append((observed_user, cachemap[observed_user]))
+            updates.append((observed_user, cachemap[observed_user]))
 
         # TODO(paul): limit
 
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 401cc677d1..4bd027d9bb 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -536,9 +536,7 @@ class RoomListHandler(BaseHandler):
         chunk = yield self.store.get_rooms(is_public=True)
         results = yield defer.gatherResults(
             [
-                self.store.get_users_in_room(
-                    room_id=room["room_id"],
-                )
+                self.store.get_users_in_room(room["room_id"])
                 for room in chunk
             ],
             consumeErrors=True,
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 312bbcc6b8..6f976d5ce8 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -345,6 +345,9 @@ class MatrixFederationHttpClient(object):
             path (str): The HTTP path.
             args (dict): A dictionary used to create query strings, defaults to
                 None.
+            timeout (int): How long to try (in ms) the destination for before
+                giving up. None indicates no timeout and that the request will
+                be retried.
         Returns:
             Deferred: Succeeds when we get *any* HTTP response.
 
diff --git a/synapse/push/__init__.py b/synapse/push/__init__.py
index 5575c847f9..e3dd4ce76d 100644
--- a/synapse/push/__init__.py
+++ b/synapse/push/__init__.py
@@ -84,25 +84,20 @@ class Pusher(object):
 
         rules = baserules.list_with_base_rules(rawrules, user)
 
+        room_id = ev['room_id']
+
         # get *our* member event for display name matching
-        member_events_for_room = yield self.store.get_current_state(
-            room_id=ev['room_id'],
+        my_display_name = None
+        our_member_event = yield self.store.get_current_state(
+            room_id=room_id,
             event_type='m.room.member',
-            state_key=None
+            state_key=self.user_name,
         )
-        my_display_name = None
-        room_member_count = 0
-        for mev in member_events_for_room:
-            if mev.content['membership'] != 'join':
-                continue
-
-            # This loop does two things:
-            # 1) Find our current display name
-            if mev.state_key == self.user_name and 'displayname' in mev.content:
-                my_display_name = mev.content['displayname']
+        if our_member_event:
+            my_display_name = our_member_event[0].content.get("displayname")
 
-            # and 2) Get the number of people in that room
-            room_member_count += 1
+        room_members = yield self.store.get_users_in_room(room_id)
+        room_member_count = len(room_members)
 
         for r in rules:
             if r['rule_id'] in enabled_map:
@@ -287,9 +282,11 @@ class Pusher(object):
             if len(actions) == 0:
                 logger.warn("Empty actions! Using default action.")
                 actions = Pusher.DEFAULT_ACTIONS
+
             if 'notify' not in actions and 'dont_notify' not in actions:
                 logger.warn("Neither notify nor dont_notify in actions: adding default")
                 actions.extend(Pusher.DEFAULT_ACTIONS)
+
             if 'dont_notify' in actions:
                 logger.debug(
                     "%s for %s: dont_notify",
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 0f146998d9..39884c2afe 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -121,6 +121,11 @@ class Cache(object):
         self.sequence += 1
         self.cache.pop(keyargs, None)
 
+    def invalidate_all(self):
+        self.check_thread()
+        self.sequence += 1
+        self.cache.clear()
+
 
 def cached(max_entries=1000, num_args=1, lru=False):
     """ A method decorator that applies a memoizing cache around the function.
@@ -172,6 +177,7 @@ def cached(max_entries=1000, num_args=1, lru=False):
                 defer.returnValue(ret)
 
         wrapped.invalidate = cache.invalidate
+        wrapped.invalidate_all = cache.invalidate_all
         wrapped.prefill = cache.prefill
         return wrapped
 
diff --git a/synapse/storage/event_federation.py b/synapse/storage/event_federation.py
index 4655c8e548..1ba073884b 100644
--- a/synapse/storage/event_federation.py
+++ b/synapse/storage/event_federation.py
@@ -489,3 +489,4 @@ class EventFederationStore(SQLBaseStore):
         query = "DELETE FROM event_forward_extremities WHERE room_id = ?"
 
         txn.execute(query, (room_id,))
+        txn.call_after(self.get_latest_event_ids_in_room.invalidate, room_id)
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index b262035fac..d2a010bd88 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -125,6 +125,12 @@ class EventsStore(SQLBaseStore):
         # We purposefully do this first since if we include a `current_state`
         # key, we *want* to update the `current_state_events` table
         if current_state:
+            txn.call_after(self.get_current_state_for_key.invalidate_all)
+            txn.call_after(self.get_rooms_for_user.invalidate_all)
+            txn.call_after(self.get_users_in_room.invalidate, event.room_id)
+            txn.call_after(self.get_joined_hosts_for_room.invalidate, event.room_id)
+            txn.call_after(self.get_room_name_and_aliases, event.room_id)
+
             self._simple_delete_txn(
                 txn,
                 table="current_state_events",
@@ -132,13 +138,6 @@ class EventsStore(SQLBaseStore):
             )
 
             for s in current_state:
-                if s.type == EventTypes.Member:
-                    txn.call_after(
-                        self.get_rooms_for_user.invalidate, s.state_key
-                    )
-                    txn.call_after(
-                        self.get_joined_hosts_for_room.invalidate, s.room_id
-                    )
                 self._simple_insert_txn(
                     txn,
                     "current_state_events",
@@ -356,6 +355,18 @@ class EventsStore(SQLBaseStore):
             )
 
             if is_new_state and not context.rejected:
+                txn.call_after(
+                    self.get_current_state_for_key.invalidate,
+                    event.room_id, event.type, event.state_key
+                )
+
+                if (event.type == EventTypes.Name
+                        or event.type == EventTypes.Aliases):
+                    txn.call_after(
+                        self.get_room_name_and_aliases.invalidate,
+                        event.room_id
+                    )
+
                 self._simple_upsert_txn(
                     txn,
                     "current_state_events",
diff --git a/synapse/storage/push_rule.py b/synapse/storage/push_rule.py
index e7988676ce..80d0ac4ea3 100644
--- a/synapse/storage/push_rule.py
+++ b/synapse/storage/push_rule.py
@@ -13,9 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import collections
-
-from ._base import SQLBaseStore, Table
+from ._base import SQLBaseStore, cached
 from twisted.internet import defer
 
 import logging
@@ -41,6 +39,7 @@ class PushRuleStore(SQLBaseStore):
 
         defer.returnValue(rows)
 
+    @cached()
     @defer.inlineCallbacks
     def get_push_rules_enabled_for_user(self, user_name):
         results = yield self._simple_select_list(
@@ -151,6 +150,10 @@ class PushRuleStore(SQLBaseStore):
 
             txn.execute(sql, (user_name, priority_class, new_rule_priority))
 
+        txn.call_after(
+            self.get_push_rules_enabled_for_user.invalidate, user_name
+        )
+
         self._simple_insert_txn(
             txn,
             table=PushRuleTable.table_name,
@@ -179,6 +182,10 @@ class PushRuleStore(SQLBaseStore):
         new_rule['priority_class'] = priority_class
         new_rule['priority'] = new_prio
 
+        txn.call_after(
+            self.get_push_rules_enabled_for_user.invalidate, user_name
+        )
+
         self._simple_insert_txn(
             txn,
             table=PushRuleTable.table_name,
@@ -201,6 +208,7 @@ class PushRuleStore(SQLBaseStore):
             {'user_name': user_name, 'rule_id': rule_id},
             desc="delete_push_rule",
         )
+        self.get_push_rules_enabled_for_user.invalidate(user_name)
 
     @defer.inlineCallbacks
     def set_push_rule_enabled(self, user_name, rule_id, enabled):
@@ -220,6 +228,7 @@ class PushRuleStore(SQLBaseStore):
             {'enabled': 1 if enabled else 0},
             {'id': new_id},
         )
+        self.get_push_rules_enabled_for_user.invalidate(user_name)
 
 
 class RuleNotFoundException(Exception):
@@ -230,7 +239,7 @@ class InconsistentRuleException(Exception):
     pass
 
 
-class PushRuleTable(Table):
+class PushRuleTable(object):
     table_name = "push_rules"
 
     fields = [
@@ -243,10 +252,8 @@ class PushRuleTable(Table):
         "actions",
     ]
 
-    EntryType = collections.namedtuple("PushRuleEntry", fields)
-
 
-class PushRuleEnableTable(Table):
+class PushRuleEnableTable(object):
     table_name = "push_rules_enable"
 
     fields = [
diff --git a/synapse/storage/room.py b/synapse/storage/room.py
index f956377632..4612a8aa83 100644
--- a/synapse/storage/room.py
+++ b/synapse/storage/room.py
@@ -17,7 +17,7 @@ from twisted.internet import defer
 
 from synapse.api.errors import StoreError
 
-from ._base import SQLBaseStore
+from ._base import SQLBaseStore, cached
 
 import collections
 import logging
@@ -186,6 +186,7 @@ class RoomStore(SQLBaseStore):
                 }
             )
 
+    @cached()
     @defer.inlineCallbacks
     def get_room_name_and_aliases(self, room_id):
         def f(txn):
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 80717f6cde..d36a6c18a8 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -66,6 +66,7 @@ class RoomMemberStore(SQLBaseStore):
 
         txn.call_after(self.get_rooms_for_user.invalidate, target_user_id)
         txn.call_after(self.get_joined_hosts_for_room.invalidate, event.room_id)
+        txn.call_after(self.get_users_in_room.invalidate, event.room_id)
 
     def get_room_member(self, user_id, room_id):
         """Retrieve the current state of a room member.
@@ -87,6 +88,7 @@ class RoomMemberStore(SQLBaseStore):
             lambda events: events[0] if events else None
         )
 
+    @cached()
     def get_users_in_room(self, room_id):
         def f(txn):
 
diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index 56f0572f7e..b24de34f23 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ._base import SQLBaseStore
+from ._base import SQLBaseStore, cached
 
 from twisted.internet import defer
 
@@ -143,6 +143,12 @@ class StateStore(SQLBaseStore):
 
     @defer.inlineCallbacks
     def get_current_state(self, room_id, event_type=None, state_key=""):
+        if event_type and state_key is not None:
+            result = yield self.get_current_state_for_key(
+                room_id, event_type, state_key
+            )
+            defer.returnValue(result)
+
         def f(txn):
             sql = (
                 "SELECT event_id FROM current_state_events"
@@ -167,6 +173,23 @@ class StateStore(SQLBaseStore):
         events = yield self._get_events(event_ids, get_prev_content=False)
         defer.returnValue(events)
 
+    @cached(num_args=3)
+    @defer.inlineCallbacks
+    def get_current_state_for_key(self, room_id, event_type, state_key):
+        def f(txn):
+            sql = (
+                "SELECT event_id FROM current_state_events"
+                " WHERE room_id = ? AND type = ? AND state_key = ?"
+            )
+
+            args = (room_id, event_type, state_key)
+            txn.execute(sql, args)
+            results = txn.fetchall()
+            return [r[0] for r in results]
+        event_ids = yield self.runInteraction("get_current_state_for_key", f)
+        events = yield self._get_events(event_ids, get_prev_content=False)
+        defer.returnValue(events)
+
 
 def _make_group_id(clock):
     return str(int(clock.time_msec())) + random_string(5)
diff --git a/synapse/util/lrucache.py b/synapse/util/lrucache.py
index 96163c90f1..cacd7e45fa 100644
--- a/synapse/util/lrucache.py
+++ b/synapse/util/lrucache.py
@@ -20,7 +20,6 @@ import threading
 
 class LruCache(object):
     """Least-recently-used cache."""
-    # TODO(mjark) Add mutex for linked list for thread safety.
     def __init__(self, max_size):
         cache = {}
         list_root = []
@@ -106,6 +105,12 @@ class LruCache(object):
                 return default
 
         @synchronized
+        def cache_clear():
+            list_root[NEXT] = list_root
+            list_root[PREV] = list_root
+            cache.clear()
+
+        @synchronized
         def cache_len():
             return len(cache)
 
@@ -120,6 +125,7 @@ class LruCache(object):
         self.pop = cache_pop
         self.len = cache_len
         self.contains = cache_contains
+        self.clear = cache_clear
 
     def __getitem__(self, key):
         result = self.get(key, self.sentinel)