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- # -*- coding: utf-8 -*-
- # Copyright 2019 The Matrix.org Foundation C.I.C.
- #
- # 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 synapse.storage.database import DatabasePool, make_conn
- from synapse.storage.databases.main.events import PersistEventsStore
- from synapse.storage.databases.state import StateGroupDataStore
- from synapse.storage.engines import create_engine
- from synapse.storage.prepare_database import prepare_database
-
- logger = logging.getLogger(__name__)
-
-
- class Databases(object):
- """The various databases.
-
- These are low level interfaces to physical databases.
-
- Attributes:
- main (DataStore)
- """
-
- def __init__(self, main_store_class, hs):
- # Note we pass in the main store class here as workers use a different main
- # store.
-
- self.databases = []
- self.main = None
- self.state = None
- self.persist_events = None
-
- for database_config in hs.config.database.databases:
- db_name = database_config.name
- engine = create_engine(database_config.config)
-
- with make_conn(database_config, engine) as db_conn:
- logger.info("Preparing database %r...", db_name)
-
- engine.check_database(db_conn)
- prepare_database(
- db_conn, engine, hs.config, databases=database_config.databases,
- )
-
- database = DatabasePool(hs, database_config, engine)
-
- if "main" in database_config.databases:
- logger.info("Starting 'main' data store")
-
- # Sanity check we don't try and configure the main store on
- # multiple databases.
- if self.main:
- raise Exception("'main' data store already configured")
-
- self.main = main_store_class(database, db_conn, hs)
-
- # If we're on a process that can persist events also
- # instantiate a `PersistEventsStore`
- if hs.config.worker.writers.events == hs.get_instance_name():
- self.persist_events = PersistEventsStore(
- hs, database, self.main
- )
-
- if "state" in database_config.databases:
- logger.info("Starting 'state' data store")
-
- # Sanity check we don't try and configure the state store on
- # multiple databases.
- if self.state:
- raise Exception("'state' data store already configured")
-
- self.state = StateGroupDataStore(database, db_conn, hs)
-
- db_conn.commit()
-
- self.databases.append(database)
-
- logger.info("Database %r prepared", db_name)
-
- # Sanity check that we have actually configured all the required stores.
- if not self.main:
- raise Exception("No 'main' data store configured")
-
- if not self.state:
- raise Exception("No 'main' data store configured")
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