mirror of
https://git.anonymousland.org/anonymousland/synapse-product.git
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200 lines
7.7 KiB
Python
200 lines
7.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket 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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from ._base import BaseSlavedStore
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from ._slaved_id_tracker import SlavedIdTracker
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from synapse.api.constants import EventTypes
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from synapse.events import FrozenEvent
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from synapse.storage import DataStore
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from synapse.storage.room import RoomStore
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from synapse.storage.roommember import RoomMemberStore
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from synapse.storage.event_federation import EventFederationStore
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from synapse.storage.state import StateStore
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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import ujson as json
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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(BaseSlavedStore):
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def __init__(self, db_conn, hs):
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super(SlavedEventStore, self).__init__(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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events_max = self._stream_id_gen.get_current_token()
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event_cache_prefill, min_event_val = self._get_cache_dict(
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db_conn, "events",
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entity_column="room_id",
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stream_column="stream_ordering",
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max_value=events_max,
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)
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self._events_stream_cache = StreamChangeCache(
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"EventsRoomStreamChangeCache", min_event_val,
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prefilled_cache=event_cache_prefill,
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)
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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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get_room_name_and_aliases = RoomStore.__dict__["get_room_name_and_aliases"]
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get_rooms_for_user = RoomMemberStore.__dict__["get_rooms_for_user"]
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get_users_in_room = RoomMemberStore.__dict__["get_users_in_room"]
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get_latest_event_ids_in_room = EventFederationStore.__dict__[
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"get_latest_event_ids_in_room"
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]
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_get_current_state_for_key = StateStore.__dict__[
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"_get_current_state_for_key"
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]
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get_current_state = DataStore.get_current_state.__func__
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get_current_state_for_key = DataStore.get_current_state_for_key.__func__
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get_rooms_for_user_where_membership_is = (
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DataStore.get_rooms_for_user_where_membership_is.__func__
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)
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get_membership_changes_for_user = (
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DataStore.get_membership_changes_for_user.__func__
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)
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get_room_events_max_id = DataStore.get_room_events_max_id.__func__
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get_room_events_stream_for_room = (
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DataStore.get_room_events_stream_for_room.__func__
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)
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_set_before_and_after = DataStore._set_before_and_after
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_get_events = DataStore._get_events.__func__
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_get_events_from_cache = DataStore._get_events_from_cache.__func__
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_invalidate_get_event_cache = DataStore._invalidate_get_event_cache.__func__
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_parse_events_txn = DataStore._parse_events_txn.__func__
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_get_events_txn = DataStore._get_events_txn.__func__
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_fetch_events_txn = DataStore._fetch_events_txn.__func__
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_fetch_event_rows = DataStore._fetch_event_rows.__func__
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_get_event_from_row_txn = DataStore._get_event_from_row_txn.__func__
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_get_rooms_for_user_where_membership_is_txn = (
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DataStore._get_rooms_for_user_where_membership_is_txn.__func__
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)
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_get_members_rows_txn = DataStore._get_members_rows_txn.__func__
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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["backfilled"] = self._backfill_id_gen.get_current_token()
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return result
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def process_replication(self, result):
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state_resets = set(
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r[0] for r in result.get("state_resets", {"rows": []})["rows"]
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)
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stream = result.get("events")
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if stream:
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self._stream_id_gen.advance(stream["position"])
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for row in stream["rows"]:
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self._process_replication_row(
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row, backfilled=False, state_resets=state_resets
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)
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stream = result.get("backfill")
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if stream:
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self._backfill_id_gen.advance(stream["position"])
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for row in stream["rows"]:
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self._process_replication_row(
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row, backfilled=True, state_resets=state_resets
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)
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stream = result.get("forward_ex_outliers")
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if stream:
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for row in stream["rows"]:
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event_id = row[1]
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self._invalidate_get_event_cache(event_id)
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stream = result.get("backward_ex_outliers")
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if stream:
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for row in stream["rows"]:
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event_id = row[1]
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self._invalidate_get_event_cache(event_id)
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return super(SlavedEventStore, self).process_replication(result)
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def _process_replication_row(self, row, backfilled, state_resets):
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position = row[0]
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internal = json.loads(row[1])
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event_json = json.loads(row[2])
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event = FrozenEvent(event_json, internal_metadata_dict=internal)
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self._invalidate_caches_for_event(
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event, backfilled, reset_state=position in state_resets
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)
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def _invalidate_caches_for_event(self, event, backfilled, reset_state):
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if reset_state:
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self._get_current_state_for_key.invalidate_all()
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self.get_rooms_for_user.invalidate_all()
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self.get_users_in_room.invalidate((event.room_id,))
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# self.get_joined_hosts_for_room.invalidate((event.room_id,))
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self.get_room_name_and_aliases.invalidate((event.room_id,))
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self._invalidate_get_event_cache(event.event_id)
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if not backfilled:
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self._events_stream_cache.entity_has_changed(
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event.room_id, event.internal_metadata.stream_ordering
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)
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# self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
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# (event.room_id,)
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# )
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if event.type == EventTypes.Redaction:
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self._invalidate_get_event_cache(event.redacts)
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if event.type == EventTypes.Member:
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self.get_rooms_for_user.invalidate((event.state_key,))
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# self.get_joined_hosts_for_room.invalidate((event.room_id,))
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self.get_users_in_room.invalidate((event.room_id,))
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# self._membership_stream_cache.entity_has_changed(
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# event.state_key, event.internal_metadata.stream_ordering
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# )
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if not event.is_state():
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return
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if backfilled:
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return
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if (not event.internal_metadata.is_invite_from_remote()
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and event.internal_metadata.is_outlier()):
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return
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self._get_current_state_for_key.invalidate((
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event.room_id, event.type, event.state_key
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))
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if event.type in [EventTypes.Name, EventTypes.Aliases]:
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self.get_room_name_and_aliases.invalidate(
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(event.room_id,)
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)
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pass
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