Remove database config parsing from apps.

synapse/server.py

@@ -97,6 +97,7 @@ from synapse.server_notices.worker_server_notices_sender import (
 )
 from synapse.state import StateHandler, StateResolutionHandler
 from synapse.storage import DataStores, Storage
+from synapse.storage.engines import create_engine
 from synapse.streams.events import EventSources
 from synapse.util import Clock
 from synapse.util.distributor import Distributor
@@ -209,7 +210,7 @@ class HomeServer(object):
     # instantiated during setup() for future return by get_datastore()
     DATASTORE_CLASS = abc.abstractproperty()
 
-    def __init__(self, hostname, reactor=None, **kwargs):
+    def __init__(self, hostname, config, reactor=None, **kwargs):
         """
         Args:
             hostname : The hostname for the server.
@@ -219,6 +220,7 @@ class HomeServer(object):
 
         self._reactor = reactor
         self.hostname = hostname
+        self.config = config
         self._building = {}
         self._listening_services = []
         self.start_time = None
@@ -229,6 +231,12 @@ class HomeServer(object):
         self.admin_redaction_ratelimiter = Ratelimiter()
         self.registration_ratelimiter = Ratelimiter()
 
+        self.database_engine = create_engine(config.database_config)
+        config.database_config.setdefault("args", {})[
+            "cp_openfun"
+        ] = self.database_engine.on_new_connection
+        self.db_config = config.database_config
+
         self.datastores = None
 
         # Other kwargs are explicit dependencies