diff options
| -rw-r--r-- | changelog.d/13892.feature | 1 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 14 | ||||
| -rw-r--r-- | synapse/storage/databases/main/room.py | 52 | ||||
| -rw-r--r-- | synapse/storage/schema/main/delta/73/04partial_join_details.sql | 23 |
4 files changed, 87 insertions, 3 deletions
diff --git a/changelog.d/13892.feature b/changelog.d/13892.feature new file mode 100644 index 0000000000..df3f576536 --- /dev/null +++ b/changelog.d/13892.feature @@ -0,0 +1 @@ +Faster remote room joins: record _when_ we first partial-join to a room. diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index e1a4265a64..74580f60df 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -581,7 +581,11 @@ class FederationHandler: # Mark the room as having partial state. # The background process is responsible for unmarking this flag, # even if the join fails. - await self.store.store_partial_state_room(room_id, ret.servers_in_room) + await self.store.store_partial_state_room( + room_id=room_id, + servers=ret.servers_in_room, + device_lists_stream_id=self.store.get_device_stream_token(), + ) try: max_stream_id = ( @@ -606,6 +610,14 @@ class FederationHandler: room_id, ) raise LimitExceededError(msg=e.msg, errcode=e.errcode, retry_after_ms=0) + else: + # Record the join event id for future use (when we finish the full + # join). We have to do this after persisting the event to keep foreign + # key constraints intact. + if ret.partial_state: + await self.store.write_partial_state_rooms_join_event_id( + room_id, event.event_id + ) finally: # Always kick off the background process that asynchronously fetches # state for the room. diff --git a/synapse/storage/databases/main/room.py b/synapse/storage/databases/main/room.py index 5dd116d766..064c332fb7 100644 --- a/synapse/storage/databases/main/room.py +++ b/synapse/storage/databases/main/room.py @@ -1777,28 +1777,46 @@ class RoomStore(RoomBackgroundUpdateStore, RoomWorkerStore): self, room_id: str, servers: Collection[str], + device_lists_stream_id: int, ) -> None: - """Mark the given room as containing events with partial state + """Mark the given room as containing events with partial state. + + We also store additional data that describes _when_ we first partial-joined this + room, which helps us to keep other homeservers in sync when we finally fully + join this room. + + We do not include a `join_event_id` here---we need to wait for the join event + to be persisted first. Args: room_id: the ID of the room servers: other servers known to be in the room + device_lists_stream_id: the device_lists stream ID at the time when we first + joined the room. """ await self.db_pool.runInteraction( "store_partial_state_room", self._store_partial_state_room_txn, room_id, servers, + device_lists_stream_id, ) def _store_partial_state_room_txn( - self, txn: LoggingTransaction, room_id: str, servers: Collection[str] + self, + txn: LoggingTransaction, + room_id: str, + servers: Collection[str], + device_lists_stream_id: int, ) -> None: DatabasePool.simple_insert_txn( txn, table="partial_state_rooms", values={ "room_id": room_id, + "device_lists_stream_id": device_lists_stream_id, + # To be updated later once the join event is persisted. + "join_event_id": None, }, ) DatabasePool.simple_insert_many_txn( @@ -1809,6 +1827,36 @@ class RoomStore(RoomBackgroundUpdateStore, RoomWorkerStore): ) self._invalidate_cache_and_stream(txn, self.is_partial_state_room, (room_id,)) + async def write_partial_state_rooms_join_event_id( + self, + room_id: str, + join_event_id: str, + ) -> None: + """Record the join event which resulted from a partial join. + + We do this separately to `store_partial_state_room` because we need to wait for + the join event to be persisted. Otherwise we violate a foreign key constraint. + """ + await self.db_pool.runInteraction( + "write_partial_state_rooms_join_event_id", + self._write_partial_state_rooms_join_event_id, + room_id, + join_event_id, + ) + + def _write_partial_state_rooms_join_event_id( + self, + txn: LoggingTransaction, + room_id: str, + join_event_id: str, + ) -> None: + DatabasePool.simple_update_txn( + txn, + table="partial_state_rooms", + keyvalues={"room_id": room_id}, + updatevalues={"join_event_id": join_event_id}, + ) + async def maybe_store_room_on_outlier_membership( self, room_id: str, room_version: RoomVersion ) -> None: diff --git a/synapse/storage/schema/main/delta/73/04partial_join_details.sql b/synapse/storage/schema/main/delta/73/04partial_join_details.sql new file mode 100644 index 0000000000..5fb2bfe1a2 --- /dev/null +++ b/synapse/storage/schema/main/delta/73/04partial_join_details.sql @@ -0,0 +1,23 @@ +/* Copyright 2022 The Matrix.org Foundation C.I.C + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- To ensure we correctly notify other homeservers about device list changes from our +-- users after a partial join transitions to a full join, we need to know when we began +-- the partial join. For now it's sufficient to know the device_list stream_id at the +-- time of the partial join, and the join event created for us during a partial join. +-- +-- Both columns are backwards compatible. +ALTER TABLE partial_state_rooms ADD COLUMN device_lists_stream_id BIGINT NOT NULL DEFAULT 0; +ALTER TABLE partial_state_rooms ADD COLUMN join_event_id TEXT REFERENCES events(event_id); |