# -*- coding: utf-8 -*- # Copyright 2016 OpenMarket Ltd # # 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. from ._base import BaseSlavedStore from ._slaved_id_tracker import SlavedIdTracker from synapse.api.constants import EventTypes from synapse.events import FrozenEvent from synapse.storage import DataStore from synapse.storage.roommember import RoomMemberStore from synapse.storage.event_federation import EventFederationStore from synapse.storage.event_push_actions import EventPushActionsStore from synapse.storage.state import StateStore from synapse.storage.stream import StreamStore from synapse.util.caches.stream_change_cache import StreamChangeCache import ujson as json # So, um, we want to borrow a load of functions intended for reading from # a DataStore, but we don't want to take functions that either write to the # DataStore or are cached and don't have cache invalidation logic. # # Rather than write duplicate versions of those functions, or lift them to # a common base class, we going to grab the underlying __func__ object from # the method descriptor on the DataStore and chuck them into our class. class SlavedEventStore(BaseSlavedStore): def __init__(self, db_conn, hs): super(SlavedEventStore, self).__init__(db_conn, hs) self._stream_id_gen = SlavedIdTracker( db_conn, "events", "stream_ordering", ) self._backfill_id_gen = SlavedIdTracker( db_conn, "events", "stream_ordering", step=-1 ) events_max = self._stream_id_gen.get_current_token() event_cache_prefill, min_event_val = self._get_cache_dict( db_conn, "events", entity_column="room_id", stream_column="stream_ordering", max_value=events_max, ) self._events_stream_cache = StreamChangeCache( "EventsRoomStreamChangeCache", min_event_val, prefilled_cache=event_cache_prefill, ) self._membership_stream_cache = StreamChangeCache( "MembershipStreamChangeCache", events_max, ) # Cached functions can't be accessed through a class instance so we need # to reach inside the __dict__ to extract them. get_rooms_for_user = RoomMemberStore.__dict__["get_rooms_for_user"] get_users_in_room = RoomMemberStore.__dict__["get_users_in_room"] get_latest_event_ids_in_room = EventFederationStore.__dict__[ "get_latest_event_ids_in_room" ] _get_current_state_for_key = StateStore.__dict__[ "_get_current_state_for_key" ] get_invited_rooms_for_user = RoomMemberStore.__dict__[ "get_invited_rooms_for_user" ] get_unread_event_push_actions_by_room_for_user = ( EventPushActionsStore.__dict__["get_unread_event_push_actions_by_room_for_user"] ) _get_state_group_for_events = ( StateStore.__dict__["_get_state_group_for_events"] ) _get_state_group_for_event = ( StateStore.__dict__["_get_state_group_for_event"] ) _get_state_groups_from_groups = ( StateStore.__dict__["_get_state_groups_from_groups"] ) _get_state_group_from_group = ( StateStore.__dict__["_get_state_group_from_group"] ) get_recent_event_ids_for_room = ( StreamStore.__dict__["get_recent_event_ids_for_room"] ) get_unread_push_actions_for_user_in_range = ( DataStore.get_unread_push_actions_for_user_in_range.__func__ ) get_push_action_users_in_range = ( DataStore.get_push_action_users_in_range.__func__ ) get_event = DataStore.get_event.__func__ get_events = DataStore.get_events.__func__ get_current_state = DataStore.get_current_state.__func__ get_current_state_for_key = DataStore.get_current_state_for_key.__func__ get_rooms_for_user_where_membership_is = ( DataStore.get_rooms_for_user_where_membership_is.__func__ ) get_membership_changes_for_user = ( DataStore.get_membership_changes_for_user.__func__ ) get_room_events_max_id = DataStore.get_room_events_max_id.__func__ get_room_events_stream_for_room = ( DataStore.get_room_events_stream_for_room.__func__ ) get_events_around = DataStore.get_events_around.__func__ get_state_for_event = DataStore.get_state_for_event.__func__ get_state_for_events = DataStore.get_state_for_events.__func__ get_state_groups = DataStore.get_state_groups.__func__ get_recent_events_for_room = DataStore.get_recent_events_for_room.__func__ get_room_events_stream_for_rooms = ( DataStore.get_room_events_stream_for_rooms.__func__ ) get_stream_token_for_event = DataStore.get_stream_token_for_event.__func__ _set_before_and_after = staticmethod(DataStore._set_before_and_after) _get_events = DataStore._get_events.__func__ _get_events_from_cache = DataStore._get_events_from_cache.__func__ _invalidate_get_event_cache = DataStore._invalidate_get_event_cache.__func__ _enqueue_events = DataStore._enqueue_events.__func__ _do_fetch = DataStore._do_fetch.__func__ _fetch_event_rows = DataStore._fetch_event_rows.__func__ _get_event_from_row = DataStore._get_event_from_row.__func__ _get_rooms_for_user_where_membership_is_txn = ( DataStore._get_rooms_for_user_where_membership_is_txn.__func__ ) _get_members_rows_txn = DataStore._get_members_rows_txn.__func__ _get_state_for_groups = DataStore._get_state_for_groups.__func__ _get_all_state_from_cache = DataStore._get_all_state_from_cache.__func__ _get_events_around_txn = DataStore._get_events_around_txn.__func__ _get_some_state_from_cache = DataStore._get_some_state_from_cache.__func__ get_backfill_events = DataStore.get_backfill_events.__func__ _get_backfill_events = DataStore._get_backfill_events.__func__ get_missing_events = DataStore.get_missing_events.__func__ _get_missing_events = DataStore._get_missing_events.__func__ get_auth_chain = DataStore.get_auth_chain.__func__ get_auth_chain_ids = DataStore.get_auth_chain_ids.__func__ _get_auth_chain_ids_txn = DataStore._get_auth_chain_ids_txn.__func__ def stream_positions(self): result = super(SlavedEventStore, self).stream_positions() result["events"] = self._stream_id_gen.get_current_token() result["backfill"] = -self._backfill_id_gen.get_current_token() return result def process_replication(self, result): state_resets = set( r[0] for r in result.get("state_resets", {"rows": []})["rows"] ) stream = result.get("events") if stream: self._stream_id_gen.advance(int(stream["position"])) for row in stream["rows"]: self._process_replication_row( row, backfilled=False, state_resets=state_resets ) stream = result.get("backfill") if stream: self._backfill_id_gen.advance(-int(stream["position"])) for row in stream["rows"]: self._process_replication_row( row, backfilled=True, state_resets=state_resets ) stream = result.get("forward_ex_outliers") if stream: self._stream_id_gen.advance(int(stream["position"])) for row in stream["rows"]: event_id = row[1] self._invalidate_get_event_cache(event_id) stream = result.get("backward_ex_outliers") if stream: self._backfill_id_gen.advance(-int(stream["position"])) for row in stream["rows"]: event_id = row[1] self._invalidate_get_event_cache(event_id) return super(SlavedEventStore, self).process_replication(result) def _process_replication_row(self, row, backfilled, state_resets): position = row[0] internal = json.loads(row[1]) event_json = json.loads(row[2]) event = FrozenEvent(event_json, internal_metadata_dict=internal) self.invalidate_caches_for_event( event, backfilled, reset_state=position in state_resets ) def invalidate_caches_for_event(self, event, backfilled, reset_state): if reset_state: self._get_current_state_for_key.invalidate_all() self.get_rooms_for_user.invalidate_all() self.get_users_in_room.invalidate((event.room_id,)) # self.get_joined_hosts_for_room.invalidate((event.room_id,)) self._invalidate_get_event_cache(event.event_id) self.get_latest_event_ids_in_room.invalidate((event.room_id,)) self.get_unread_event_push_actions_by_room_for_user.invalidate_many( (event.room_id,) ) if not backfilled: self._events_stream_cache.entity_has_changed( event.room_id, event.internal_metadata.stream_ordering ) # self.get_unread_event_push_actions_by_room_for_user.invalidate_many( # (event.room_id,) # ) if event.type == EventTypes.Redaction: self._invalidate_get_event_cache(event.redacts) if event.type == EventTypes.Member: self.get_rooms_for_user.invalidate((event.state_key,)) # self.get_joined_hosts_for_room.invalidate((event.room_id,)) self.get_users_in_room.invalidate((event.room_id,)) self._membership_stream_cache.entity_has_changed( event.state_key, event.internal_metadata.stream_ordering ) self.get_invited_rooms_for_user.invalidate((event.state_key,)) if not event.is_state(): return if backfilled: return if (not event.internal_metadata.is_invite_from_remote() and event.internal_metadata.is_outlier()): return self._get_current_state_for_key.invalidate(( event.room_id, event.type, event.state_key ))