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# -*- 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.
import logging
from typing import Optional
from synapse.storage.data_stores.main.cache import CacheInvalidationWorkerStore
from synapse.storage.database import Database
from synapse.storage.engines import PostgresEngine
from synapse.storage.util.id_generators import MultiWriterIdGenerator
logger = logging.getLogger(__name__)
class BaseSlavedStore(CacheInvalidationWorkerStore):
def __init__(self, database: Database, db_conn, hs):
super(BaseSlavedStore, self).__init__(database, db_conn, hs)
if isinstance(self.database_engine, PostgresEngine):
self._cache_id_gen = MultiWriterIdGenerator(
db_conn,
database,
instance_name=hs.get_instance_name(),
table="cache_invalidation_stream_by_instance",
instance_column="instance_name",
id_column="stream_id",
sequence_name="cache_invalidation_stream_seq",
) # type: Optional[MultiWriterIdGenerator]
else:
self._cache_id_gen = None
self.hs = hs
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