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# Copyright 2016 OpenMarket Ltd
# Copyright 2018 New Vector 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.
import logging
from typing import TYPE_CHECKING
from synapse.storage.database import DatabasePool, LoggingDatabaseConnection
from synapse.storage.databases.main.event_federation import EventFederationWorkerStore
from synapse.storage.databases.main.event_push_actions import (
EventPushActionsWorkerStore,
)
from synapse.storage.databases.main.events_worker import EventsWorkerStore
from synapse.storage.databases.main.relations import RelationsWorkerStore
from synapse.storage.databases.main.roommember import RoomMemberWorkerStore
from synapse.storage.databases.main.signatures import SignatureWorkerStore
from synapse.storage.databases.main.state import StateGroupWorkerStore
from synapse.storage.databases.main.stream import StreamWorkerStore
from synapse.storage.databases.main.user_erasure_store import UserErasureWorkerStore
from synapse.util.caches.stream_change_cache import StreamChangeCache
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
# 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(
EventFederationWorkerStore,
RoomMemberWorkerStore,
EventPushActionsWorkerStore,
StreamWorkerStore,
StateGroupWorkerStore,
SignatureWorkerStore,
EventsWorkerStore,
UserErasureWorkerStore,
RelationsWorkerStore,
):
def __init__(
self,
database: DatabasePool,
db_conn: LoggingDatabaseConnection,
hs: "HomeServer",
):
super().__init__(database, db_conn, hs)
events_max = self._stream_id_gen.get_current_token()
curr_state_delta_prefill, min_curr_state_delta_id = self.db_pool.get_cache_dict(
db_conn,
"current_state_delta_stream",
entity_column="room_id",
stream_column="stream_id",
max_value=events_max, # As we share the stream id with events token
limit=1000,
)
self._curr_state_delta_stream_cache = StreamChangeCache(
"_curr_state_delta_stream_cache",
min_curr_state_delta_id,
prefilled_cache=curr_state_delta_prefill,
)
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