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During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
146 lines
5.3 KiB
Python
146 lines
5.3 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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import logging
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from typing import TYPE_CHECKING, Generic, List, Optional, Type, TypeVar
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from synapse.storage._base import SQLBaseStore
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from synapse.storage.database import DatabasePool, make_conn
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from synapse.storage.databases.main.events import PersistEventsStore
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from synapse.storage.databases.state import StateGroupDataStore
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from synapse.storage.engines import create_engine
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from synapse.storage.prepare_database import prepare_database
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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from synapse.storage.databases.main import DataStore
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logger = logging.getLogger(__name__)
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DataStoreT = TypeVar("DataStoreT", bound=SQLBaseStore, covariant=True)
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class Databases(Generic[DataStoreT]):
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"""The various databases.
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These are low level interfaces to physical databases.
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Attributes:
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databases
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main
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state
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persist_events
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"""
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databases: List[DatabasePool]
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main: "DataStore" # FIXME: https://github.com/matrix-org/synapse/issues/11165: actually an instance of `main_store_class`
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state: StateGroupDataStore
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persist_events: Optional[PersistEventsStore]
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def __init__(self, main_store_class: Type[DataStoreT], hs: "HomeServer"):
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# Note we pass in the main store class here as workers use a different main
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# store.
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self.databases = []
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main: Optional[DataStoreT] = None
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state: Optional[StateGroupDataStore] = None
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persist_events: Optional[PersistEventsStore] = None
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for database_config in hs.config.database.databases:
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db_name = database_config.name
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engine = create_engine(database_config.config)
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with make_conn(database_config, engine, "startup") as db_conn:
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logger.info("[database config %r]: Checking database server", db_name)
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engine.check_database(db_conn)
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logger.info(
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"[database config %r]: Preparing for databases %r",
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db_name,
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database_config.databases,
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)
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prepare_database(
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db_conn,
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engine,
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hs.config,
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databases=database_config.databases,
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)
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database = DatabasePool(hs, database_config, engine)
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if "main" in database_config.databases:
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logger.info(
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"[database config %r]: Starting 'main' database", db_name
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)
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# Sanity check we don't try and configure the main store on
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# multiple databases.
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if main:
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raise Exception("'main' data store already configured")
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main = main_store_class(database, db_conn, hs)
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# If we're on a process that can persist events also
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# instantiate a `PersistEventsStore`
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if hs.get_instance_name() in hs.config.worker.writers.events:
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persist_events = PersistEventsStore(hs, database, main, db_conn) # type: ignore[arg-type]
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if "state" in database_config.databases:
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logger.info(
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"[database config %r]: Starting 'state' database", db_name
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)
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# Sanity check we don't try and configure the state store on
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# multiple databases.
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if state:
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raise Exception("'state' data store already configured")
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state = StateGroupDataStore(database, db_conn, hs)
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db_conn.commit()
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self.databases.append(database)
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logger.info("[database config %r]: prepared", db_name)
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# Closing the context manager doesn't close the connection.
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# psycopg will close the connection when the object gets GCed, but *only*
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# if the PID is the same as when the connection was opened [1], and
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# it may not be if we fork in the meantime.
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#
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# [1]: https://github.com/psycopg/psycopg2/blob/2_8_5/psycopg/connection_type.c#L1378
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db_conn.close()
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# Sanity check that we have actually configured all the required stores.
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if not main:
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raise Exception("No 'main' database configured")
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if not state:
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raise Exception("No 'state' database configured")
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# We use local variables here to ensure that the databases do not have
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# optional types.
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self.main = main # type: ignore[assignment]
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self.state = state
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self.persist_events = persist_events
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