Reduce the amount of state we pull from the DB (#12811)

synapse/handlers/directory.py

@@ -320,7 +320,7 @@ class DirectoryHandler:
         Raises:
             ShadowBanError if the requester has been shadow-banned.
         """
-        alias_event = await self.state.get_current_state(
+        alias_event = await self._storage_controllers.state.get_current_state_event(
             room_id, EventTypes.CanonicalAlias, ""
         )
 

synapse/handlers/federation.py

@@ -371,7 +371,7 @@ class FederationHandler:
         # First we try hosts that are already in the room
         # TODO: HEURISTIC ALERT.
 
-        curr_state = await self.state_handler.get_current_state(room_id)
+        curr_state = await self._storage_controllers.state.get_current_state(room_id)
 
         curr_domains = get_domains_from_state(curr_state)
 

synapse/handlers/federation_event.py

@@ -1584,9 +1584,11 @@ class FederationEventHandler:
         if guest_access == GuestAccess.CAN_JOIN:
             return
 
-        current_state_map = await self._state_handler.get_current_state(event.room_id)
-        current_state = list(current_state_map.values())
-        await self._get_room_member_handler().kick_guest_users(current_state)
+        current_state = await self._storage_controllers.state.get_current_state(
+            event.room_id
+        )
+        current_state_list = list(current_state.values())
+        await self._get_room_member_handler().kick_guest_users(current_state_list)
 
     async def _check_for_soft_fail(
         self,
@@ -1614,6 +1616,9 @@ class FederationEventHandler:
         room_version = await self._store.get_room_version_id(event.room_id)
         room_version_obj = KNOWN_ROOM_VERSIONS[room_version]
 
+        # The event types we want to pull from the "current" state.
+        auth_types = auth_types_for_event(room_version_obj, event)
+
         # Calculate the "current state".
         if state_ids is not None:
             # If we're explicitly given the state then we won't have all the
@@ -1643,8 +1648,10 @@ class FederationEventHandler:
                 )
             )
         else:
-            current_state_ids = await self._state_handler.get_current_state_ids(
-                event.room_id, latest_event_ids=extrem_ids
+            current_state_ids = (
+                await self._state_storage_controller.get_current_state_ids(
+                    event.room_id, StateFilter.from_types(auth_types)
+                )
             )
 
         logger.debug(
@@ -1654,7 +1661,6 @@ class FederationEventHandler:
         )
 
         # Now check if event pass auth against said current state
-        auth_types = auth_types_for_event(room_version_obj, event)
         current_state_ids_list = [
             e for k, e in current_state_ids.items() if k in auth_types
         ]

synapse/handlers/initial_sync.py

@@ -190,7 +190,7 @@ class InitialSyncHandler:
                 if event.membership == Membership.JOIN:
                     room_end_token = now_token.room_key
                     deferred_room_state = run_in_background(
-                        self.state_handler.get_current_state, event.room_id
+                        self._state_storage_controller.get_current_state, event.room_id
                     )
                 elif event.membership == Membership.LEAVE:
                     room_end_token = RoomStreamToken(
@@ -407,7 +407,9 @@ class InitialSyncHandler:
         membership: str,
         is_peeking: bool,
     ) -> JsonDict:
-        current_state = await self.state.get_current_state(room_id=room_id)
+        current_state = await self._storage_controllers.state.get_current_state(
+            room_id=room_id
+        )
 
         # TODO: These concurrently
         time_now = self.clock.time_msec()

synapse/handlers/message.py

@@ -125,7 +125,9 @@ class MessageHandler:
         )
 
         if membership == Membership.JOIN:
-            data = await self.state.get_current_state(room_id, event_type, state_key)
+            data = await self._storage_controllers.state.get_current_state_event(
+                room_id, event_type, state_key
+            )
         elif membership == Membership.LEAVE:
             key = (event_type, state_key)
             # If the membership is not JOIN, then the event ID should exist.

synapse/handlers/room.py

@@ -1333,6 +1333,7 @@ class TimestampLookupHandler:
         self.store = hs.get_datastores().main
         self.state_handler = hs.get_state_handler()
         self.federation_client = hs.get_federation_client()
+        self._storage_controllers = hs.get_storage_controllers()
 
     async def get_event_for_timestamp(
         self,
@@ -1406,7 +1407,9 @@ class TimestampLookupHandler:
             )
 
             # Find other homeservers from the given state in the room
-            curr_state = await self.state_handler.get_current_state(room_id)
+            curr_state = await self._storage_controllers.state.get_current_state(
+                room_id
+            )
             curr_domains = get_domains_from_state(curr_state)
             likely_domains = [
                 domain for domain, depth in curr_domains if domain != self.server_name

synapse/handlers/room_member.py

@@ -1401,7 +1401,19 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
         txn_id: Optional[str],
         id_access_token: Optional[str] = None,
     ) -> int:
-        room_state = await self.state_handler.get_current_state(room_id)
+        room_state = await self._storage_controllers.state.get_current_state(
+            room_id,
+            StateFilter.from_types(
+                [
+                    (EventTypes.Member, user.to_string()),
+                    (EventTypes.CanonicalAlias, ""),
+                    (EventTypes.Name, ""),
+                    (EventTypes.Create, ""),
+                    (EventTypes.JoinRules, ""),
+                    (EventTypes.RoomAvatar, ""),
+                ]
+            ),
+        )
 
         inviter_display_name = ""
         inviter_avatar_url = ""
@@ -1797,7 +1809,7 @@ class RoomMemberMasterHandler(RoomMemberHandler):
     async def forget(self, user: UserID, room_id: str) -> None:
         user_id = user.to_string()
 
-        member = await self.state_handler.get_current_state(
+        member = await self._storage_controllers.state.get_current_state_event(
             room_id=room_id, event_type=EventTypes.Member, state_key=user_id
         )
         membership = member.membership if member else None

synapse/handlers/search.py

@@ -348,7 +348,7 @@ class SearchHandler:
         state_results = {}
         if include_state:
             for room_id in {e.room_id for e in search_result.allowed_events}:
-                state = await self.state_handler.get_current_state(room_id)
+                state = await self._storage_controllers.state.get_current_state(room_id)
                 state_results[room_id] = list(state.values())
 
         aggregations = await self._relations_handler.get_bundled_aggregations(