195 lines
7.5 KiB
Python
195 lines
7.5 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.storage import DataStore
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from synapse.storage.event_federation import EventFederationStore
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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.state import StateGroupWorkerStore
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from synapse.storage.stream import StreamStore
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from synapse.storage.signatures import SignatureStore
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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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(RoomMemberWorkerStore, EventPushActionsWorkerStore,
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EventsWorkerStore, StateGroupWorkerStore,
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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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self._membership_stream_cache = StreamChangeCache(
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"MembershipStreamChangeCache", events_max,
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)
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self.stream_ordering_month_ago = 0
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self._stream_order_on_start = self.get_room_max_stream_ordering()
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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_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_recent_event_ids_for_room = (
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StreamStore.__dict__["get_recent_event_ids_for_room"]
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)
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has_room_changed_since = DataStore.has_room_changed_since.__func__
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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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get_events_around = DataStore.get_events_around.__func__
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get_recent_events_for_room = DataStore.get_recent_events_for_room.__func__
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get_room_events_stream_for_rooms = (
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DataStore.get_room_events_stream_for_rooms.__func__
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)
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get_stream_token_for_event = DataStore.get_stream_token_for_event.__func__
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_set_before_and_after = staticmethod(DataStore._set_before_and_after)
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_get_events_around_txn = DataStore._get_events_around_txn.__func__
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get_backfill_events = DataStore.get_backfill_events.__func__
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_get_backfill_events = DataStore._get_backfill_events.__func__
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get_missing_events = DataStore.get_missing_events.__func__
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_get_missing_events = DataStore._get_missing_events.__func__
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get_auth_chain = DataStore.get_auth_chain.__func__
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get_auth_chain_ids = DataStore.get_auth_chain_ids.__func__
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_get_auth_chain_ids_txn = DataStore._get_auth_chain_ids_txn.__func__
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get_room_max_stream_ordering = DataStore.get_room_max_stream_ordering.__func__
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get_forward_extremeties_for_room = (
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DataStore.get_forward_extremeties_for_room.__func__
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)
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_get_forward_extremeties_for_room = (
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EventFederationStore.__dict__["_get_forward_extremeties_for_room"]
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)
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get_all_new_events_stream = DataStore.get_all_new_events_stream.__func__
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get_federation_out_pos = DataStore.get_federation_out_pos.__func__
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update_federation_out_pos = DataStore.update_federation_out_pos.__func__
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get_latest_event_ids_and_hashes_in_room = (
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DataStore.get_latest_event_ids_and_hashes_in_room.__func__
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)
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_get_latest_event_ids_and_hashes_in_room = (
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DataStore._get_latest_event_ids_and_hashes_in_room.__func__
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)
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_get_event_reference_hashes_txn = (
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DataStore._get_event_reference_hashes_txn.__func__
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)
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add_event_hashes = (
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DataStore.add_event_hashes.__func__
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)
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get_event_reference_hashes = (
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SignatureStore.__dict__["get_event_reference_hashes"]
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)
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get_event_reference_hash = (
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SignatureStore.__dict__["get_event_reference_hash"]
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)
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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.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=False,
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)
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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 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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