Add database config class (#6513)

This encapsulates config for a given database and is the way to get new
connections.

1 files changed, 3 insertions, 4 deletions

diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py
index 731e1c9d9c..b4194b44ee 100644
--- a/synapse/storage/prepare_database.py
+++ b/synapse/storage/prepare_database.py
@@ -41,7 +41,7 @@ class UpgradeDatabaseException(PrepareDatabaseException):
     pass
 
 
-def prepare_database(db_conn, database_engine, config):
+def prepare_database(db_conn, database_engine, config, data_stores=["main"]):
     """Prepares a database for usage. Will either create all necessary tables
     or upgrade from an older schema version.
 
@@ -54,11 +54,10 @@ def prepare_database(db_conn, database_engine, config):
         config (synapse.config.homeserver.HomeServerConfig|None):
             application config, or None if we are connecting to an existing
             database which we expect to be configured already
+        data_stores (list[str]): The name of the data stores that will be used
+            with this database. Defaults to all data stores.
     """
 
-    # For now we only have the one datastore.
-    data_stores = ["main"]
-
     try:
         cur = db_conn.cursor()
         version_info = _get_or_create_schema_state(cur, database_engine)