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https://mau.dev/maunium/synapse.git
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297bf2547e
Hopefully this time we really will fix #4422. We need to make sure that the cache on `get_rooms_for_user_with_stream_ordering` is invalidated *before* the SyncHandler is notified for the new events, and we can now do so reliably via the `events` stream.
139 lines
5.3 KiB
Python
139 lines
5.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from synapse.api.constants import EventTypes
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from synapse.replication.tcp.streams.events import (
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EventsStreamCurrentStateRow,
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EventsStreamEventRow,
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)
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from synapse.storage.event_federation import EventFederationWorkerStore
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from synapse.storage.event_push_actions import EventPushActionsWorkerStore
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from synapse.storage.events_worker import EventsWorkerStore
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from synapse.storage.roommember import RoomMemberWorkerStore
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from synapse.storage.signatures import SignatureWorkerStore
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from synapse.storage.state import StateGroupWorkerStore
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from synapse.storage.stream import StreamWorkerStore
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from synapse.storage.user_erasure_store import UserErasureWorkerStore
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from ._base import BaseSlavedStore
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from ._slaved_id_tracker import SlavedIdTracker
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logger = logging.getLogger(__name__)
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# So, um, we want to borrow a load of functions intended for reading from
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# a DataStore, but we don't want to take functions that either write to the
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# DataStore or are cached and don't have cache invalidation logic.
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#
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# Rather than write duplicate versions of those functions, or lift them to
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# a common base class, we going to grab the underlying __func__ object from
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# the method descriptor on the DataStore and chuck them into our class.
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class SlavedEventStore(EventFederationWorkerStore,
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RoomMemberWorkerStore,
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EventPushActionsWorkerStore,
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StreamWorkerStore,
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StateGroupWorkerStore,
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EventsWorkerStore,
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SignatureWorkerStore,
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UserErasureWorkerStore,
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BaseSlavedStore):
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def __init__(self, db_conn, hs):
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self._stream_id_gen = SlavedIdTracker(
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db_conn, "events", "stream_ordering",
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)
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self._backfill_id_gen = SlavedIdTracker(
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db_conn, "events", "stream_ordering", step=-1
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)
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super(SlavedEventStore, self).__init__(db_conn, hs)
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# Cached functions can't be accessed through a class instance so we need
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# to reach inside the __dict__ to extract them.
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def get_room_max_stream_ordering(self):
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return self._stream_id_gen.get_current_token()
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def get_room_min_stream_ordering(self):
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return self._backfill_id_gen.get_current_token()
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def stream_positions(self):
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result = super(SlavedEventStore, self).stream_positions()
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result["events"] = self._stream_id_gen.get_current_token()
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result["backfill"] = -self._backfill_id_gen.get_current_token()
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return result
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def process_replication_rows(self, stream_name, token, rows):
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if stream_name == "events":
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self._stream_id_gen.advance(token)
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for row in rows:
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self._process_event_stream_row(token, row)
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elif stream_name == "backfill":
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self._backfill_id_gen.advance(-token)
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for row in rows:
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self.invalidate_caches_for_event(
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-token, row.event_id, row.room_id, row.type, row.state_key,
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row.redacts,
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backfilled=True,
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)
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return super(SlavedEventStore, self).process_replication_rows(
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stream_name, token, rows
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)
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def _process_event_stream_row(self, token, row):
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data = row.data
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if row.type == EventsStreamEventRow.TypeId:
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self.invalidate_caches_for_event(
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token, data.event_id, data.room_id, data.type, data.state_key,
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data.redacts,
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backfilled=False,
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)
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elif row.type == EventsStreamCurrentStateRow.TypeId:
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if data.type == EventTypes.Member:
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self.get_rooms_for_user_with_stream_ordering.invalidate(
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(data.state_key, ),
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)
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else:
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raise Exception("Unknown events stream row type %s" % (row.type, ))
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def invalidate_caches_for_event(self, stream_ordering, event_id, room_id,
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etype, state_key, redacts, backfilled):
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self._invalidate_get_event_cache(event_id)
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self.get_latest_event_ids_in_room.invalidate((room_id,))
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self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
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(room_id,)
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)
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if not backfilled:
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self._events_stream_cache.entity_has_changed(
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room_id, stream_ordering
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)
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if redacts:
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self._invalidate_get_event_cache(redacts)
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if etype == EventTypes.Member:
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self._membership_stream_cache.entity_has_changed(
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state_key, stream_ordering
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)
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self.get_invited_rooms_for_user.invalidate((state_key,))
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