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authorErik Johnston <erik@matrix.org>2019-10-31 15:19:26 +0000
committerErik Johnston <erik@matrix.org>2019-10-31 15:19:26 +0000
commitcd581338cf2618d8480ce7ba6a2ffd4a5270b552 (patch)
tree533c0f5efcde3f06ea6e069c9d4ee8fb4f6ee231 /synapse
parentNewsfile (diff)
parentMerge pull request #6294 from matrix-org/erikj/add_state_storage (diff)
downloadsynapse-cd581338cf2618d8480ce7ba6a2ffd4a5270b552.tar.xz
Merge branch 'develop' of github.com:matrix-org/synapse into erikj/split_purge_history
Diffstat (limited to 'synapse')
-rw-r--r--synapse/api/auth.py2
-rw-r--r--synapse/app/__init__.py4
-rw-r--r--synapse/app/appservice.py4
-rw-r--r--synapse/app/client_reader.py4
-rw-r--r--synapse/app/event_creator.py4
-rw-r--r--synapse/app/federation_reader.py4
-rw-r--r--synapse/app/federation_sender.py4
-rw-r--r--synapse/app/frontend_proxy.py4
-rw-r--r--synapse/app/homeserver.py6
-rw-r--r--synapse/app/media_repository.py4
-rw-r--r--synapse/app/pusher.py4
-rw-r--r--synapse/app/synchrotron.py4
-rw-r--r--synapse/app/user_dir.py4
-rw-r--r--synapse/config/key.py4
-rw-r--r--synapse/config/logger.py2
-rw-r--r--synapse/event_auth.py2
-rw-r--r--synapse/events/spamcheck.py14
-rw-r--r--synapse/federation/federation_base.py6
-rw-r--r--synapse/federation/federation_client.py8
-rw-r--r--synapse/federation/federation_server.py20
-rw-r--r--synapse/federation/sender/transaction_manager.py4
-rw-r--r--synapse/federation/transport/server.py8
-rw-r--r--synapse/groups/attestations.py2
-rw-r--r--synapse/groups/groups_server.py2
-rw-r--r--synapse/handlers/admin.py7
-rw-r--r--synapse/handlers/auth.py6
-rw-r--r--synapse/handlers/device.py7
-rw-r--r--synapse/handlers/devicemessage.py2
-rw-r--r--synapse/handlers/events.py6
-rw-r--r--synapse/handlers/federation.py55
-rw-r--r--synapse/handlers/groups_local.py2
-rw-r--r--synapse/handlers/identity.py6
-rw-r--r--synapse/handlers/initial_sync.py14
-rw-r--r--synapse/handlers/message.py12
-rw-r--r--synapse/handlers/pagination.py5
-rw-r--r--synapse/handlers/profile.py2
-rw-r--r--synapse/handlers/room.py8
-rw-r--r--synapse/handlers/search.py12
-rw-r--r--synapse/handlers/sync.py20
-rw-r--r--synapse/http/client.py4
-rw-r--r--synapse/http/federation/srv_resolver.py2
-rw-r--r--synapse/http/matrixfederationclient.py10
-rw-r--r--synapse/http/request_metrics.py2
-rw-r--r--synapse/http/server.py2
-rw-r--r--synapse/http/servlet.py4
-rw-r--r--synapse/http/site.py4
-rw-r--r--synapse/logging/context.py2
-rw-r--r--synapse/notifier.py6
-rw-r--r--synapse/push/httppusher.py7
-rw-r--r--synapse/push/mailer.py3
-rw-r--r--synapse/push/push_rule_evaluator.py4
-rw-r--r--synapse/push/push_tools.py9
-rw-r--r--synapse/replication/http/_base.py2
-rw-r--r--synapse/replication/http/membership.py2
-rw-r--r--synapse/replication/tcp/client.py2
-rw-r--r--synapse/replication/tcp/protocol.py2
-rw-r--r--synapse/rest/admin/__init__.py2
-rw-r--r--synapse/rest/client/v1/login.py2
-rw-r--r--synapse/rest/client/v2_alpha/account.py14
-rw-r--r--synapse/rest/client/v2_alpha/register.py10
-rw-r--r--synapse/rest/client/v2_alpha/sync.py2
-rw-r--r--synapse/rest/media/v1/media_repository.py12
-rw-r--r--synapse/rest/media/v1/preview_url_resource.py16
-rw-r--r--synapse/rest/media/v1/thumbnail_resource.py4
-rw-r--r--synapse/server_notices/resource_limits_server_notices.py2
-rw-r--r--synapse/spam_checker_api/__init__.py51
-rw-r--r--synapse/state/__init__.py13
-rw-r--r--synapse/storage/__init__.py2
-rw-r--r--synapse/storage/_base.py6
-rw-r--r--synapse/storage/data_stores/main/events.py3
-rw-r--r--synapse/storage/data_stores/main/pusher.py2
-rw-r--r--synapse/storage/data_stores/main/search.py2
-rw-r--r--synapse/storage/persist_events.py7
-rw-r--r--synapse/storage/state.py233
-rw-r--r--synapse/util/async_helpers.py2
-rw-r--r--synapse/util/caches/__init__.py2
-rw-r--r--synapse/util/metrics.py6
-rw-r--r--synapse/util/rlimit.py2
-rw-r--r--synapse/visibility.py30
79 files changed, 562 insertions, 218 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 53f3bb0fa8..5d0b7d2801 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -497,7 +497,7 @@ class Auth(object):
         token = self.get_access_token_from_request(request)
         service = self.store.get_app_service_by_token(token)
         if not service:
-            logger.warn("Unrecognised appservice access token.")
+            logger.warning("Unrecognised appservice access token.")
             raise InvalidClientTokenError()
         request.authenticated_entity = service.sender
         return defer.succeed(service)
diff --git a/synapse/app/__init__.py b/synapse/app/__init__.py
index d877c77834..a01bac2997 100644
--- a/synapse/app/__init__.py
+++ b/synapse/app/__init__.py
@@ -44,6 +44,8 @@ def check_bind_error(e, address, bind_addresses):
         bind_addresses (list): Addresses on which the service listens.
     """
     if address == "0.0.0.0" and "::" in bind_addresses:
-        logger.warn("Failed to listen on 0.0.0.0, continuing because listening on [::]")
+        logger.warning(
+            "Failed to listen on 0.0.0.0, continuing because listening on [::]"
+        )
     else:
         raise e
diff --git a/synapse/app/appservice.py b/synapse/app/appservice.py
index 767b87d2db..02b900f382 100644
--- a/synapse/app/appservice.py
+++ b/synapse/app/appservice.py
@@ -94,7 +94,7 @@ class AppserviceServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -103,7 +103,7 @@ class AppserviceServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/client_reader.py b/synapse/app/client_reader.py
index dbcc414c42..dadb487d5f 100644
--- a/synapse/app/client_reader.py
+++ b/synapse/app/client_reader.py
@@ -153,7 +153,7 @@ class ClientReaderServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -162,7 +162,7 @@ class ClientReaderServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/event_creator.py b/synapse/app/event_creator.py
index f20d810ece..d110599a35 100644
--- a/synapse/app/event_creator.py
+++ b/synapse/app/event_creator.py
@@ -147,7 +147,7 @@ class EventCreatorServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -156,7 +156,7 @@ class EventCreatorServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/federation_reader.py b/synapse/app/federation_reader.py
index 1ef027a88c..418c086254 100644
--- a/synapse/app/federation_reader.py
+++ b/synapse/app/federation_reader.py
@@ -132,7 +132,7 @@ class FederationReaderServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -141,7 +141,7 @@ class FederationReaderServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/federation_sender.py b/synapse/app/federation_sender.py
index 04fbb407af..139221ad34 100644
--- a/synapse/app/federation_sender.py
+++ b/synapse/app/federation_sender.py
@@ -123,7 +123,7 @@ class FederationSenderServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -132,7 +132,7 @@ class FederationSenderServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/frontend_proxy.py b/synapse/app/frontend_proxy.py
index 9504bfbc70..e647459d0e 100644
--- a/synapse/app/frontend_proxy.py
+++ b/synapse/app/frontend_proxy.py
@@ -204,7 +204,7 @@ class FrontendProxyServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -213,7 +213,7 @@ class FrontendProxyServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index eb54f56853..8997c1f9e7 100644
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -282,7 +282,7 @@ class SynapseHomeServer(HomeServer):
                     reactor.addSystemEventTrigger("before", "shutdown", s.stopListening)
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -291,7 +291,7 @@ class SynapseHomeServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
     def run_startup_checks(self, db_conn, database_engine):
         all_users_native = are_all_users_on_domain(
@@ -569,7 +569,7 @@ def run(hs):
                 hs.config.report_stats_endpoint, stats
             )
         except Exception as e:
-            logger.warn("Error reporting stats: %s", e)
+            logger.warning("Error reporting stats: %s", e)
 
     def performance_stats_init():
         try:
diff --git a/synapse/app/media_repository.py b/synapse/app/media_repository.py
index 6bc7202f33..2c6dd3ef02 100644
--- a/synapse/app/media_repository.py
+++ b/synapse/app/media_repository.py
@@ -120,7 +120,7 @@ class MediaRepositoryServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -129,7 +129,7 @@ class MediaRepositoryServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/pusher.py b/synapse/app/pusher.py
index d84732ee3c..01a5ffc363 100644
--- a/synapse/app/pusher.py
+++ b/synapse/app/pusher.py
@@ -114,7 +114,7 @@ class PusherServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -123,7 +123,7 @@ class PusherServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/synchrotron.py b/synapse/app/synchrotron.py
index 6a7e2fa707..b14da09f47 100644
--- a/synapse/app/synchrotron.py
+++ b/synapse/app/synchrotron.py
@@ -326,7 +326,7 @@ class SynchrotronServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -335,7 +335,7 @@ class SynchrotronServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/app/user_dir.py b/synapse/app/user_dir.py
index a5d6dc7915..6cb100319f 100644
--- a/synapse/app/user_dir.py
+++ b/synapse/app/user_dir.py
@@ -150,7 +150,7 @@ class UserDirectoryServer(HomeServer):
                 )
             elif listener["type"] == "metrics":
                 if not self.get_config().enable_metrics:
-                    logger.warn(
+                    logger.warning(
                         (
                             "Metrics listener configured, but "
                             "enable_metrics is not True!"
@@ -159,7 +159,7 @@ class UserDirectoryServer(HomeServer):
                 else:
                     _base.listen_metrics(listener["bind_addresses"], listener["port"])
             else:
-                logger.warn("Unrecognized listener type: %s", listener["type"])
+                logger.warning("Unrecognized listener type: %s", listener["type"])
 
         self.get_tcp_replication().start_replication(self)
 
diff --git a/synapse/config/key.py b/synapse/config/key.py
index ec5d430afb..52ff1b2621 100644
--- a/synapse/config/key.py
+++ b/synapse/config/key.py
@@ -125,7 +125,7 @@ class KeyConfig(Config):
 
         # if neither trusted_key_servers nor perspectives are given, use the default.
         if "perspectives" not in config and "trusted_key_servers" not in config:
-            logger.warn(TRUSTED_KEY_SERVER_NOT_CONFIGURED_WARN)
+            logger.warning(TRUSTED_KEY_SERVER_NOT_CONFIGURED_WARN)
             key_servers = [{"server_name": "matrix.org"}]
         else:
             key_servers = config.get("trusted_key_servers", [])
@@ -156,7 +156,7 @@ class KeyConfig(Config):
         if not self.macaroon_secret_key:
             # Unfortunately, there are people out there that don't have this
             # set. Lets just be "nice" and derive one from their secret key.
-            logger.warn("Config is missing macaroon_secret_key")
+            logger.warning("Config is missing macaroon_secret_key")
             seed = bytes(self.signing_key[0])
             self.macaroon_secret_key = hashlib.sha256(seed).digest()
 
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index be92e33f93..2d2c1e54df 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -182,7 +182,7 @@ def _reload_stdlib_logging(*args, log_config=None):
     logger = logging.getLogger("")
 
     if not log_config:
-        logger.warn("Reloaded a blank config?")
+        logger.warning("Reloaded a blank config?")
 
     logging.config.dictConfig(log_config)
 
diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index e7b722547b..ec3243b27b 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -77,7 +77,7 @@ def check(room_version, event, auth_events, do_sig_check=True, do_size_check=Tru
     if auth_events is None:
         # Oh, we don't know what the state of the room was, so we
         # are trusting that this is allowed (at least for now)
-        logger.warn("Trusting event: %s", event.event_id)
+        logger.warning("Trusting event: %s", event.event_id)
         return
 
     if event.type == EventTypes.Create:
diff --git a/synapse/events/spamcheck.py b/synapse/events/spamcheck.py
index 129771f183..5a907718d6 100644
--- a/synapse/events/spamcheck.py
+++ b/synapse/events/spamcheck.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 # Copyright 2017 New Vector Ltd
+# 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.
@@ -13,6 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import inspect
+
+from synapse.spam_checker_api import SpamCheckerApi
+
 
 class SpamChecker(object):
     def __init__(self, hs):
@@ -26,7 +31,14 @@ class SpamChecker(object):
             pass
 
         if module is not None:
-            self.spam_checker = module(config=config)
+            # Older spam checkers don't accept the `api` argument, so we
+            # try and detect support.
+            spam_args = inspect.getfullargspec(module)
+            if "api" in spam_args.args:
+                api = SpamCheckerApi(hs)
+                self.spam_checker = module(config=config, api=api)
+            else:
+                self.spam_checker = module(config=config)
 
     def check_event_for_spam(self, event):
         """Checks if a given event is considered "spammy" by this server.
diff --git a/synapse/federation/federation_base.py b/synapse/federation/federation_base.py
index 223aace0d9..0e22183280 100644
--- a/synapse/federation/federation_base.py
+++ b/synapse/federation/federation_base.py
@@ -102,7 +102,7 @@ class FederationBase(object):
                     pass
 
             if not res:
-                logger.warn(
+                logger.warning(
                     "Failed to find copy of %s with valid signature", pdu.event_id
                 )
 
@@ -173,7 +173,7 @@ class FederationBase(object):
                     return redacted_event
 
                 if self.spam_checker.check_event_for_spam(pdu):
-                    logger.warn(
+                    logger.warning(
                         "Event contains spam, redacting %s: %s",
                         pdu.event_id,
                         pdu.get_pdu_json(),
@@ -185,7 +185,7 @@ class FederationBase(object):
         def errback(failure, pdu):
             failure.trap(SynapseError)
             with PreserveLoggingContext(ctx):
-                logger.warn(
+                logger.warning(
                     "Signature check failed for %s: %s",
                     pdu.event_id,
                     failure.getErrorMessage(),
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index f5c1632916..595706d01a 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -522,12 +522,12 @@ class FederationClient(FederationBase):
                 res = yield callback(destination)
                 return res
             except InvalidResponseError as e:
-                logger.warn("Failed to %s via %s: %s", description, destination, e)
+                logger.warning("Failed to %s via %s: %s", description, destination, e)
             except HttpResponseException as e:
                 if not 500 <= e.code < 600:
                     raise e.to_synapse_error()
                 else:
-                    logger.warn(
+                    logger.warning(
                         "Failed to %s via %s: %i %s",
                         description,
                         destination,
@@ -535,7 +535,9 @@ class FederationClient(FederationBase):
                         e.args[0],
                     )
             except Exception:
-                logger.warn("Failed to %s via %s", description, destination, exc_info=1)
+                logger.warning(
+                    "Failed to %s via %s", description, destination, exc_info=1
+                )
 
         raise SynapseError(502, "Failed to %s via any server" % (description,))
 
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index d5a19764d2..d942d77a72 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -220,7 +220,7 @@ class FederationServer(FederationBase):
             try:
                 await self.check_server_matches_acl(origin_host, room_id)
             except AuthError as e:
-                logger.warn("Ignoring PDUs for room %s from banned server", room_id)
+                logger.warning("Ignoring PDUs for room %s from banned server", room_id)
                 for pdu in pdus_by_room[room_id]:
                     event_id = pdu.event_id
                     pdu_results[event_id] = e.error_dict()
@@ -233,7 +233,7 @@ class FederationServer(FederationBase):
                         await self._handle_received_pdu(origin, pdu)
                         pdu_results[event_id] = {}
                     except FederationError as e:
-                        logger.warn("Error handling PDU %s: %s", event_id, e)
+                        logger.warning("Error handling PDU %s: %s", event_id, e)
                         pdu_results[event_id] = {"error": str(e)}
                     except Exception as e:
                         f = failure.Failure()
@@ -333,7 +333,9 @@ class FederationServer(FederationBase):
 
         room_version = await self.store.get_room_version(room_id)
         if room_version not in supported_versions:
-            logger.warn("Room version %s not in %s", room_version, supported_versions)
+            logger.warning(
+                "Room version %s not in %s", room_version, supported_versions
+            )
             raise IncompatibleRoomVersionError(room_version=room_version)
 
         pdu = await self.handler.on_make_join_request(origin, room_id, user_id)
@@ -679,7 +681,7 @@ def server_matches_acl_event(server_name, acl_event):
     # server name is a literal IP
     allow_ip_literals = acl_event.content.get("allow_ip_literals", True)
     if not isinstance(allow_ip_literals, bool):
-        logger.warn("Ignorning non-bool allow_ip_literals flag")
+        logger.warning("Ignorning non-bool allow_ip_literals flag")
         allow_ip_literals = True
     if not allow_ip_literals:
         # check for ipv6 literals. These start with '['.
@@ -693,7 +695,7 @@ def server_matches_acl_event(server_name, acl_event):
     # next,  check the deny list
     deny = acl_event.content.get("deny", [])
     if not isinstance(deny, (list, tuple)):
-        logger.warn("Ignorning non-list deny ACL %s", deny)
+        logger.warning("Ignorning non-list deny ACL %s", deny)
         deny = []
     for e in deny:
         if _acl_entry_matches(server_name, e):
@@ -703,7 +705,7 @@ def server_matches_acl_event(server_name, acl_event):
     # then the allow list.
     allow = acl_event.content.get("allow", [])
     if not isinstance(allow, (list, tuple)):
-        logger.warn("Ignorning non-list allow ACL %s", allow)
+        logger.warning("Ignorning non-list allow ACL %s", allow)
         allow = []
     for e in allow:
         if _acl_entry_matches(server_name, e):
@@ -717,7 +719,7 @@ def server_matches_acl_event(server_name, acl_event):
 
 def _acl_entry_matches(server_name, acl_entry):
     if not isinstance(acl_entry, six.string_types):
-        logger.warn(
+        logger.warning(
             "Ignoring non-str ACL entry '%s' (is %s)", acl_entry, type(acl_entry)
         )
         return False
@@ -772,7 +774,7 @@ class FederationHandlerRegistry(object):
     async def on_edu(self, edu_type, origin, content):
         handler = self.edu_handlers.get(edu_type)
         if not handler:
-            logger.warn("No handler registered for EDU type %s", edu_type)
+            logger.warning("No handler registered for EDU type %s", edu_type)
 
         with start_active_span_from_edu(content, "handle_edu"):
             try:
@@ -785,7 +787,7 @@ class FederationHandlerRegistry(object):
     def on_query(self, query_type, args):
         handler = self.query_handlers.get(query_type)
         if not handler:
-            logger.warn("No handler registered for query type %s", query_type)
+            logger.warning("No handler registered for query type %s", query_type)
             raise NotFoundError("No handler for Query type '%s'" % (query_type,))
 
         return handler(args)
diff --git a/synapse/federation/sender/transaction_manager.py b/synapse/federation/sender/transaction_manager.py
index 5b6c79c51a..67b3e1ab6e 100644
--- a/synapse/federation/sender/transaction_manager.py
+++ b/synapse/federation/sender/transaction_manager.py
@@ -146,7 +146,7 @@ class TransactionManager(object):
             if code == 200:
                 for e_id, r in response.get("pdus", {}).items():
                     if "error" in r:
-                        logger.warn(
+                        logger.warning(
                             "TX [%s] {%s} Remote returned error for %s: %s",
                             destination,
                             txn_id,
@@ -155,7 +155,7 @@ class TransactionManager(object):
                         )
             else:
                 for p in pdus:
-                    logger.warn(
+                    logger.warning(
                         "TX [%s] {%s} Failed to send event %s",
                         destination,
                         txn_id,
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 0f16f21c2d..d6c23f22bd 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -202,7 +202,7 @@ def _parse_auth_header(header_bytes):
         sig = strip_quotes(param_dict["sig"])
         return origin, key, sig
     except Exception as e:
-        logger.warn(
+        logger.warning(
             "Error parsing auth header '%s': %s",
             header_bytes.decode("ascii", "replace"),
             e,
@@ -287,10 +287,12 @@ class BaseFederationServlet(object):
             except NoAuthenticationError:
                 origin = None
                 if self.REQUIRE_AUTH:
-                    logger.warn("authenticate_request failed: missing authentication")
+                    logger.warning(
+                        "authenticate_request failed: missing authentication"
+                    )
                     raise
             except Exception as e:
-                logger.warn("authenticate_request failed: %s", e)
+                logger.warning("authenticate_request failed: %s", e)
                 raise
 
             request_tags = {
diff --git a/synapse/groups/attestations.py b/synapse/groups/attestations.py
index dfd7ae041b..d950a8b246 100644
--- a/synapse/groups/attestations.py
+++ b/synapse/groups/attestations.py
@@ -181,7 +181,7 @@ class GroupAttestionRenewer(object):
                 elif not self.is_mine_id(user_id):
                     destination = get_domain_from_id(user_id)
                 else:
-                    logger.warn(
+                    logger.warning(
                         "Incorrectly trying to do attestations for user: %r in %r",
                         user_id,
                         group_id,
diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py
index 8f10b6adbb..29e8ffc295 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -488,7 +488,7 @@ class GroupsServerHandler(object):
                 profile = yield self.profile_handler.get_profile_from_cache(user_id)
                 user_profile.update(profile)
             except Exception as e:
-                logger.warn("Error getting profile for %s: %s", user_id, e)
+                logger.warning("Error getting profile for %s: %s", user_id, e)
             user_profiles.append(user_profile)
 
         return {"chunk": user_profiles, "total_user_count_estimate": len(invited_users)}
diff --git a/synapse/handlers/admin.py b/synapse/handlers/admin.py
index 1a87b58838..6407d56f8e 100644
--- a/synapse/handlers/admin.py
+++ b/synapse/handlers/admin.py
@@ -30,6 +30,9 @@ class AdminHandler(BaseHandler):
     def __init__(self, hs):
         super(AdminHandler, self).__init__(hs)
 
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
+
     @defer.inlineCallbacks
     def get_whois(self, user):
         connections = []
@@ -205,7 +208,7 @@ class AdminHandler(BaseHandler):
 
                 from_key = events[-1].internal_metadata.after
 
-                events = yield filter_events_for_client(self.store, user_id, events)
+                events = yield filter_events_for_client(self.storage, user_id, events)
 
                 writer.write_events(room_id, events)
 
@@ -241,7 +244,7 @@ class AdminHandler(BaseHandler):
             for event_id in extremities:
                 if not event_to_unseen_prevs[event_id]:
                     continue
-                state = yield self.store.get_state_for_event(event_id)
+                state = yield self.state_store.get_state_for_event(event_id)
                 writer.write_state(room_id, event_id, state)
 
         return writer.finished()
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 333eb30625..7a0f54ca24 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -525,7 +525,7 @@ class AuthHandler(BaseHandler):
 
         result = None
         if not user_infos:
-            logger.warn("Attempted to login as %s but they do not exist", user_id)
+            logger.warning("Attempted to login as %s but they do not exist", user_id)
         elif len(user_infos) == 1:
             # a single match (possibly not exact)
             result = user_infos.popitem()
@@ -534,7 +534,7 @@ class AuthHandler(BaseHandler):
             result = (user_id, user_infos[user_id])
         else:
             # multiple matches, none of them exact
-            logger.warn(
+            logger.warning(
                 "Attempted to login as %s but it matches more than one user "
                 "inexactly: %r",
                 user_id,
@@ -728,7 +728,7 @@ class AuthHandler(BaseHandler):
 
         result = yield self.validate_hash(password, password_hash)
         if not result:
-            logger.warn("Failed password login for user %s", user_id)
+            logger.warning("Failed password login for user %s", user_id)
             return None
         return user_id
 
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index 5f23ee4488..16b4617f68 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -46,6 +46,7 @@ class DeviceWorkerHandler(BaseHandler):
 
         self.hs = hs
         self.state = hs.get_state_handler()
+        self.state_store = hs.get_storage().state
         self._auth_handler = hs.get_auth_handler()
 
     @trace
@@ -178,7 +179,7 @@ class DeviceWorkerHandler(BaseHandler):
                 continue
 
             # mapping from event_id -> state_dict
-            prev_state_ids = yield self.store.get_state_ids_for_events(event_ids)
+            prev_state_ids = yield self.state_store.get_state_ids_for_events(event_ids)
 
             # Check if we've joined the room? If so we just blindly add all the users to
             # the "possibly changed" users.
@@ -656,7 +657,7 @@ class DeviceListUpdater(object):
         except (NotRetryingDestination, RequestSendFailed, HttpResponseException):
             # TODO: Remember that we are now out of sync and try again
             # later
-            logger.warn("Failed to handle device list update for %s", user_id)
+            logger.warning("Failed to handle device list update for %s", user_id)
             # We abort on exceptions rather than accepting the update
             # as otherwise synapse will 'forget' that its device list
             # is out of date. If we bail then we will retry the resync
@@ -694,7 +695,7 @@ class DeviceListUpdater(object):
         # up on storing the total list of devices and only handle the
         # delta instead.
         if len(devices) > 1000:
-            logger.warn(
+            logger.warning(
                 "Ignoring device list snapshot for %s as it has >1K devs (%d)",
                 user_id,
                 len(devices),
diff --git a/synapse/handlers/devicemessage.py b/synapse/handlers/devicemessage.py
index 0043cbea17..73b9e120f5 100644
--- a/synapse/handlers/devicemessage.py
+++ b/synapse/handlers/devicemessage.py
@@ -52,7 +52,7 @@ class DeviceMessageHandler(object):
         local_messages = {}
         sender_user_id = content["sender"]
         if origin != get_domain_from_id(sender_user_id):
-            logger.warn(
+            logger.warning(
                 "Dropping device message from %r with spoofed sender %r",
                 origin,
                 sender_user_id,
diff --git a/synapse/handlers/events.py b/synapse/handlers/events.py
index 5e748687e3..45fe13c62f 100644
--- a/synapse/handlers/events.py
+++ b/synapse/handlers/events.py
@@ -147,6 +147,10 @@ class EventStreamHandler(BaseHandler):
 
 
 class EventHandler(BaseHandler):
+    def __init__(self, hs):
+        super(EventHandler, self).__init__(hs)
+        self.storage = hs.get_storage()
+
     @defer.inlineCallbacks
     def get_event(self, user, room_id, event_id):
         """Retrieve a single specified event.
@@ -172,7 +176,7 @@ class EventHandler(BaseHandler):
         is_peeking = user.to_string() not in users
 
         filtered = yield filter_events_for_client(
-            self.store, user.to_string(), [event], is_peeking=is_peeking
+            self.storage, user.to_string(), [event], is_peeking=is_peeking
         )
 
         if not filtered:
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 08276fdebf..d2d9f8c26a 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -110,6 +110,7 @@ class FederationHandler(BaseHandler):
 
         self.store = hs.get_datastore()
         self.storage = hs.get_storage()
+        self.state_store = self.storage.state
         self.federation_client = hs.get_federation_client()
         self.state_handler = hs.get_state_handler()
         self.server_name = hs.hostname
@@ -181,7 +182,7 @@ class FederationHandler(BaseHandler):
         try:
             self._sanity_check_event(pdu)
         except SynapseError as err:
-            logger.warn(
+            logger.warning(
                 "[%s %s] Received event failed sanity checks", room_id, event_id
             )
             raise FederationError("ERROR", err.code, err.msg, affected=pdu.event_id)
@@ -302,7 +303,7 @@ class FederationHandler(BaseHandler):
                 # following.
 
                 if sent_to_us_directly:
-                    logger.warn(
+                    logger.warning(
                         "[%s %s] Rejecting: failed to fetch %d prev events: %s",
                         room_id,
                         event_id,
@@ -325,7 +326,7 @@ class FederationHandler(BaseHandler):
                 event_map = {event_id: pdu}
                 try:
                     # Get the state of the events we know about
-                    ours = yield self.store.get_state_groups_ids(room_id, seen)
+                    ours = yield self.state_store.get_state_groups_ids(room_id, seen)
 
                     # state_maps is a list of mappings from (type, state_key) to event_id
                     state_maps = list(
@@ -406,7 +407,7 @@ class FederationHandler(BaseHandler):
                     state = [event_map[e] for e in six.itervalues(state_map)]
                     auth_chain = list(auth_chains)
                 except Exception:
-                    logger.warn(
+                    logger.warning(
                         "[%s %s] Error attempting to resolve state at missing "
                         "prev_events",
                         room_id,
@@ -519,7 +520,9 @@ class FederationHandler(BaseHandler):
             # We failed to get the missing events, but since we need to handle
             # the case of `get_missing_events` not returning the necessary
             # events anyway, it is safe to simply log the error and continue.
-            logger.warn("[%s %s]: Failed to get prev_events: %s", room_id, event_id, e)
+            logger.warning(
+                "[%s %s]: Failed to get prev_events: %s", room_id, event_id, e
+            )
             return
 
         logger.info(
@@ -546,7 +549,7 @@ class FederationHandler(BaseHandler):
                     yield self.on_receive_pdu(origin, ev, sent_to_us_directly=False)
                 except FederationError as e:
                     if e.code == 403:
-                        logger.warn(
+                        logger.warning(
                             "[%s %s] Received prev_event %s failed history check.",
                             room_id,
                             event_id,
@@ -889,7 +892,7 @@ class FederationHandler(BaseHandler):
         # We set `check_history_visibility_only` as we might otherwise get false
         # positives from users having been erased.
         filtered_extremities = yield filter_events_for_server(
-            self.store,
+            self.storage,
             self.server_name,
             list(extremities_events.values()),
             redact=False,
@@ -1060,7 +1063,7 @@ class FederationHandler(BaseHandler):
             SynapseError if the event does not pass muster
         """
         if len(ev.prev_event_ids()) > 20:
-            logger.warn(
+            logger.warning(
                 "Rejecting event %s which has %i prev_events",
                 ev.event_id,
                 len(ev.prev_event_ids()),
@@ -1068,7 +1071,7 @@ class FederationHandler(BaseHandler):
             raise SynapseError(http_client.BAD_REQUEST, "Too many prev_events")
 
         if len(ev.auth_event_ids()) > 10:
-            logger.warn(
+            logger.warning(
                 "Rejecting event %s which has %i auth_events",
                 ev.event_id,
                 len(ev.auth_event_ids()),
@@ -1204,7 +1207,7 @@ class FederationHandler(BaseHandler):
                 with nested_logging_context(p.event_id):
                     yield self.on_receive_pdu(origin, p, sent_to_us_directly=True)
             except Exception as e:
-                logger.warn(
+                logger.warning(
                     "Error handling queued PDU %s from %s: %s", p.event_id, origin, e
                 )
 
@@ -1251,7 +1254,7 @@ class FederationHandler(BaseHandler):
                 builder=builder
             )
         except AuthError as e:
-            logger.warn("Failed to create join to %s because %s", room_id, e)
+            logger.warning("Failed to create join to %s because %s", room_id, e)
             raise e
 
         event_allowed = yield self.third_party_event_rules.check_event_allowed(
@@ -1495,7 +1498,7 @@ class FederationHandler(BaseHandler):
                 room_version, event, context, do_sig_check=False
             )
         except AuthError as e:
-            logger.warn("Failed to create new leave %r because %s", event, e)
+            logger.warning("Failed to create new leave %r because %s", event, e)
             raise e
 
         return event
@@ -1550,7 +1553,7 @@ class FederationHandler(BaseHandler):
             event_id, allow_none=False, check_room_id=room_id
         )
 
-        state_groups = yield self.store.get_state_groups(room_id, [event_id])
+        state_groups = yield self.state_store.get_state_groups(room_id, [event_id])
 
         if state_groups:
             _, state = list(iteritems(state_groups)).pop()
@@ -1579,7 +1582,7 @@ class FederationHandler(BaseHandler):
             event_id, allow_none=False, check_room_id=room_id
         )
 
-        state_groups = yield self.store.get_state_groups_ids(room_id, [event_id])
+        state_groups = yield self.state_store.get_state_groups_ids(room_id, [event_id])
 
         if state_groups:
             _, state = list(state_groups.items()).pop()
@@ -1607,7 +1610,7 @@ class FederationHandler(BaseHandler):
 
         events = yield self.store.get_backfill_events(room_id, pdu_list, limit)
 
-        events = yield filter_events_for_server(self.store, origin, events)
+        events = yield filter_events_for_server(self.storage, origin, events)
 
         return events
 
@@ -1637,7 +1640,7 @@ class FederationHandler(BaseHandler):
             if not in_room:
                 raise AuthError(403, "Host not in room.")
 
-            events = yield filter_events_for_server(self.store, origin, [event])
+            events = yield filter_events_for_server(self.storage, origin, [event])
             event = events[0]
             return event
         else:
@@ -1789,7 +1792,7 @@ class FederationHandler(BaseHandler):
                 # cause SynapseErrors in auth.check. We don't want to give up
                 # the attempt to federate altogether in such cases.
 
-                logger.warn("Rejecting %s because %s", e.event_id, err.msg)
+                logger.warning("Rejecting %s because %s", e.event_id, err.msg)
 
                 if e == event:
                     raise
@@ -1845,7 +1848,9 @@ class FederationHandler(BaseHandler):
         try:
             yield self.do_auth(origin, event, context, auth_events=auth_events)
         except AuthError as e:
-            logger.warn("[%s %s] Rejecting: %s", event.room_id, event.event_id, e.msg)
+            logger.warning(
+                "[%s %s] Rejecting: %s", event.room_id, event.event_id, e.msg
+            )
 
             context.rejected = RejectedReason.AUTH_ERROR
 
@@ -1903,7 +1908,7 @@ class FederationHandler(BaseHandler):
                 # given state at the event. This should correctly handle cases
                 # like bans, especially with state res v2.
 
-                state_sets = yield self.store.get_state_groups(
+                state_sets = yield self.state_store.get_state_groups(
                     event.room_id, extrem_ids
                 )
                 state_sets = list(state_sets.values())
@@ -1939,7 +1944,7 @@ class FederationHandler(BaseHandler):
             try:
                 event_auth.check(room_version, event, auth_events=current_auth_events)
             except AuthError as e:
-                logger.warn("Soft-failing %r because %s", event, e)
+                logger.warning("Soft-failing %r because %s", event, e)
                 event.internal_metadata.soft_failed = True
 
     @defer.inlineCallbacks
@@ -1994,7 +1999,7 @@ class FederationHandler(BaseHandler):
         )
 
         missing_events = yield filter_events_for_server(
-            self.store, origin, missing_events
+            self.storage, origin, missing_events
         )
 
         return missing_events
@@ -2038,7 +2043,7 @@ class FederationHandler(BaseHandler):
         try:
             event_auth.check(room_version, event, auth_events=auth_events)
         except AuthError as e:
-            logger.warn("Failed auth resolution for %r because %s", event, e)
+            logger.warning("Failed auth resolution for %r because %s", event, e)
             raise e
 
     @defer.inlineCallbacks
@@ -2235,7 +2240,7 @@ class FederationHandler(BaseHandler):
 
         # create a new state group as a delta from the existing one.
         prev_group = context.state_group
-        state_group = yield self.store.store_state_group(
+        state_group = yield self.state_store.store_state_group(
             event.event_id,
             event.room_id,
             prev_group=prev_group,
@@ -2432,7 +2437,7 @@ class FederationHandler(BaseHandler):
             try:
                 yield self.auth.check_from_context(room_version, event, context)
             except AuthError as e:
-                logger.warn("Denying new third party invite %r because %s", event, e)
+                logger.warning("Denying new third party invite %r because %s", event, e)
                 raise e
 
             yield self._check_signature(event, context)
@@ -2488,7 +2493,7 @@ class FederationHandler(BaseHandler):
         try:
             yield self.auth.check_from_context(room_version, event, context)
         except AuthError as e:
-            logger.warn("Denying third party invite %r because %s", event, e)
+            logger.warning("Denying third party invite %r because %s", event, e)
             raise e
         yield self._check_signature(event, context)
 
diff --git a/synapse/handlers/groups_local.py b/synapse/handlers/groups_local.py
index 46eb9ee88b..92fecbfc44 100644
--- a/synapse/handlers/groups_local.py
+++ b/synapse/handlers/groups_local.py
@@ -392,7 +392,7 @@ class GroupsLocalHandler(object):
         try:
             user_profile = yield self.profile_handler.get_profile(user_id)
         except Exception as e:
-            logger.warn("No profile for user %s: %s", user_id, e)
+            logger.warning("No profile for user %s: %s", user_id, e)
             user_profile = {}
 
         return {"state": "invite", "user_profile": user_profile}
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py
index ba99ddf76d..000fbf090f 100644
--- a/synapse/handlers/identity.py
+++ b/synapse/handlers/identity.py
@@ -272,7 +272,7 @@ class IdentityHandler(BaseHandler):
             changed = False
             if e.code in (400, 404, 501):
                 # The remote server probably doesn't support unbinding (yet)
-                logger.warn("Received %d response while unbinding threepid", e.code)
+                logger.warning("Received %d response while unbinding threepid", e.code)
             else:
                 logger.error("Failed to unbind threepid on identity server: %s", e)
                 raise SynapseError(500, "Failed to contact identity server")
@@ -403,7 +403,7 @@ class IdentityHandler(BaseHandler):
 
         if self.hs.config.using_identity_server_from_trusted_list:
             # Warn that a deprecated config option is in use
-            logger.warn(
+            logger.warning(
                 'The config option "trust_identity_server_for_password_resets" '
                 'has been replaced by "account_threepid_delegate". '
                 "Please consult the sample config at docs/sample_config.yaml for "
@@ -457,7 +457,7 @@ class IdentityHandler(BaseHandler):
 
         if self.hs.config.using_identity_server_from_trusted_list:
             # Warn that a deprecated config option is in use
-            logger.warn(
+            logger.warning(
                 'The config option "trust_identity_server_for_password_resets" '
                 'has been replaced by "account_threepid_delegate". '
                 "Please consult the sample config at docs/sample_config.yaml for "
diff --git a/synapse/handlers/initial_sync.py b/synapse/handlers/initial_sync.py
index f991efeee3..49c9e031f9 100644
--- a/synapse/handlers/initial_sync.py
+++ b/synapse/handlers/initial_sync.py
@@ -43,6 +43,8 @@ class InitialSyncHandler(BaseHandler):
         self.validator = EventValidator()
         self.snapshot_cache = SnapshotCache()
         self._event_serializer = hs.get_event_client_serializer()
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
 
     def snapshot_all_rooms(
         self,
@@ -169,7 +171,7 @@ class InitialSyncHandler(BaseHandler):
                 elif event.membership == Membership.LEAVE:
                     room_end_token = "s%d" % (event.stream_ordering,)
                     deferred_room_state = run_in_background(
-                        self.store.get_state_for_events, [event.event_id]
+                        self.state_store.get_state_for_events, [event.event_id]
                     )
                     deferred_room_state.addCallback(
                         lambda states: states[event.event_id]
@@ -189,7 +191,9 @@ class InitialSyncHandler(BaseHandler):
                     )
                 ).addErrback(unwrapFirstError)
 
-                messages = yield filter_events_for_client(self.store, user_id, messages)
+                messages = yield filter_events_for_client(
+                    self.storage, user_id, messages
+                )
 
                 start_token = now_token.copy_and_replace("room_key", token)
                 end_token = now_token.copy_and_replace("room_key", room_end_token)
@@ -307,7 +311,7 @@ class InitialSyncHandler(BaseHandler):
     def _room_initial_sync_parted(
         self, user_id, room_id, pagin_config, membership, member_event_id, is_peeking
     ):
-        room_state = yield self.store.get_state_for_events([member_event_id])
+        room_state = yield self.state_store.get_state_for_events([member_event_id])
 
         room_state = room_state[member_event_id]
 
@@ -322,7 +326,7 @@ class InitialSyncHandler(BaseHandler):
         )
 
         messages = yield filter_events_for_client(
-            self.store, user_id, messages, is_peeking=is_peeking
+            self.storage, user_id, messages, is_peeking=is_peeking
         )
 
         start_token = StreamToken.START.copy_and_replace("room_key", token)
@@ -414,7 +418,7 @@ class InitialSyncHandler(BaseHandler):
         )
 
         messages = yield filter_events_for_client(
-            self.store, user_id, messages, is_peeking=is_peeking
+            self.storage, user_id, messages, is_peeking=is_peeking
         )
 
         start_token = now_token.copy_and_replace("room_key", token)
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 7908a2d52c..0d546d2487 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -59,6 +59,8 @@ class MessageHandler(object):
         self.clock = hs.get_clock()
         self.state = hs.get_state_handler()
         self.store = hs.get_datastore()
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
         self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
@@ -82,7 +84,7 @@ class MessageHandler(object):
             data = yield self.state.get_current_state(room_id, event_type, state_key)
         elif membership == Membership.LEAVE:
             key = (event_type, state_key)
-            room_state = yield self.store.get_state_for_events(
+            room_state = yield self.state_store.get_state_for_events(
                 [membership_event_id], StateFilter.from_types([key])
             )
             data = room_state[membership_event_id].get(key)
@@ -135,12 +137,12 @@ class MessageHandler(object):
                 raise NotFoundError("Can't find event for token %s" % (at_token,))
 
             visible_events = yield filter_events_for_client(
-                self.store, user_id, last_events
+                self.storage, user_id, last_events
             )
 
             event = last_events[0]
             if visible_events:
-                room_state = yield self.store.get_state_for_events(
+                room_state = yield self.state_store.get_state_for_events(
                     [event.event_id], state_filter=state_filter
                 )
                 room_state = room_state[event.event_id]
@@ -161,7 +163,7 @@ class MessageHandler(object):
                 )
                 room_state = yield self.store.get_events(state_ids.values())
             elif membership == Membership.LEAVE:
-                room_state = yield self.store.get_state_for_events(
+                room_state = yield self.state_store.get_state_for_events(
                     [membership_event_id], state_filter=state_filter
                 )
                 room_state = room_state[membership_event_id]
@@ -688,7 +690,7 @@ class EventCreationHandler(object):
         try:
             yield self.auth.check_from_context(room_version, event, context)
         except AuthError as err:
-            logger.warn("Denying new event %r because %s", event, err)
+            logger.warning("Denying new event %r because %s", event, err)
             raise err
 
         # Ensure that we can round trip before trying to persist in db
diff --git a/synapse/handlers/pagination.py b/synapse/handlers/pagination.py
index 9088ba14cd..6d8b04efe3 100644
--- a/synapse/handlers/pagination.py
+++ b/synapse/handlers/pagination.py
@@ -70,6 +70,7 @@ class PaginationHandler(object):
         self.auth = hs.get_auth()
         self.store = hs.get_datastore()
         self.storage = hs.get_storage()
+        self.state_store = self.storage.state
         self.clock = hs.get_clock()
         self._server_name = hs.hostname
 
@@ -258,7 +259,7 @@ class PaginationHandler(object):
                 events = event_filter.filter(events)
 
             events = yield filter_events_for_client(
-                self.store, user_id, events, is_peeking=(member_event_id is None)
+                self.storage, user_id, events, is_peeking=(member_event_id is None)
             )
 
         if not events:
@@ -277,7 +278,7 @@ class PaginationHandler(object):
                 (EventTypes.Member, event.sender) for event in events
             )
 
-            state_ids = yield self.store.get_state_ids_for_event(
+            state_ids = yield self.state_store.get_state_ids_for_event(
                 events[0].event_id, state_filter=state_filter
             )
 
diff --git a/synapse/handlers/profile.py b/synapse/handlers/profile.py
index 8690f69d45..22e0a04da4 100644
--- a/synapse/handlers/profile.py
+++ b/synapse/handlers/profile.py
@@ -275,7 +275,7 @@ class BaseProfileHandler(BaseHandler):
                     ratelimit=False,  # Try to hide that these events aren't atomic.
                 )
             except Exception as e:
-                logger.warn(
+                logger.warning(
                     "Failed to update join event for room %s - %s", room_id, str(e)
                 )
 
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 2816bd8f87..650bd28abb 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -822,6 +822,8 @@ class RoomContextHandler(object):
     def __init__(self, hs):
         self.hs = hs
         self.store = hs.get_datastore()
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
 
     @defer.inlineCallbacks
     def get_event_context(self, user, room_id, event_id, limit, event_filter):
@@ -848,7 +850,7 @@ class RoomContextHandler(object):
 
         def filter_evts(events):
             return filter_events_for_client(
-                self.store, user.to_string(), events, is_peeking=is_peeking
+                self.storage, user.to_string(), events, is_peeking=is_peeking
             )
 
         event = yield self.store.get_event(
@@ -890,7 +892,7 @@ class RoomContextHandler(object):
         # first? Shouldn't we be consistent with /sync?
         # https://github.com/matrix-org/matrix-doc/issues/687
 
-        state = yield self.store.get_state_for_events(
+        state = yield self.state_store.get_state_for_events(
             [last_event_id], state_filter=state_filter
         )
         results["state"] = list(state[last_event_id].values())
@@ -922,7 +924,7 @@ class RoomEventSource(object):
 
         from_token = RoomStreamToken.parse(from_key)
         if from_token.topological:
-            logger.warn("Stream has topological part!!!! %r", from_key)
+            logger.warning("Stream has topological part!!!! %r", from_key)
             from_key = "s%s" % (from_token.stream,)
 
         app_service = self.store.get_app_service_by_user_id(user.to_string())
diff --git a/synapse/handlers/search.py b/synapse/handlers/search.py
index cd5e90bacb..f4d8a60774 100644
--- a/synapse/handlers/search.py
+++ b/synapse/handlers/search.py
@@ -35,6 +35,8 @@ class SearchHandler(BaseHandler):
     def __init__(self, hs):
         super(SearchHandler, self).__init__(hs)
         self._event_serializer = hs.get_event_client_serializer()
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
 
     @defer.inlineCallbacks
     def get_old_rooms_from_upgraded_room(self, room_id):
@@ -221,7 +223,7 @@ class SearchHandler(BaseHandler):
             filtered_events = search_filter.filter([r["event"] for r in results])
 
             events = yield filter_events_for_client(
-                self.store, user.to_string(), filtered_events
+                self.storage, user.to_string(), filtered_events
             )
 
             events.sort(key=lambda e: -rank_map[e.event_id])
@@ -271,7 +273,7 @@ class SearchHandler(BaseHandler):
                 filtered_events = search_filter.filter([r["event"] for r in results])
 
                 events = yield filter_events_for_client(
-                    self.store, user.to_string(), filtered_events
+                    self.storage, user.to_string(), filtered_events
                 )
 
                 room_events.extend(events)
@@ -340,11 +342,11 @@ class SearchHandler(BaseHandler):
                 )
 
                 res["events_before"] = yield filter_events_for_client(
-                    self.store, user.to_string(), res["events_before"]
+                    self.storage, user.to_string(), res["events_before"]
                 )
 
                 res["events_after"] = yield filter_events_for_client(
-                    self.store, user.to_string(), res["events_after"]
+                    self.storage, user.to_string(), res["events_after"]
                 )
 
                 res["start"] = now_token.copy_and_replace(
@@ -372,7 +374,7 @@ class SearchHandler(BaseHandler):
                         [(EventTypes.Member, sender) for sender in senders]
                     )
 
-                    state = yield self.store.get_state_for_event(
+                    state = yield self.state_store.get_state_for_event(
                         last_event_id, state_filter
                     )
 
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index d99160e9d7..43a082dcda 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -230,6 +230,8 @@ class SyncHandler(object):
         self.response_cache = ResponseCache(hs, "sync")
         self.state = hs.get_state_handler()
         self.auth = hs.get_auth()
+        self.storage = hs.get_storage()
+        self.state_store = self.storage.state
 
         # ExpiringCache((User, Device)) -> LruCache(state_key => event_id)
         self.lazy_loaded_members_cache = ExpiringCache(
@@ -417,7 +419,7 @@ class SyncHandler(object):
                     current_state_ids = frozenset(itervalues(current_state_ids))
 
                 recents = yield filter_events_for_client(
-                    self.store,
+                    self.storage,
                     sync_config.user.to_string(),
                     recents,
                     always_include_ids=current_state_ids,
@@ -470,7 +472,7 @@ class SyncHandler(object):
                     current_state_ids = frozenset(itervalues(current_state_ids))
 
                 loaded_recents = yield filter_events_for_client(
-                    self.store,
+                    self.storage,
                     sync_config.user.to_string(),
                     loaded_recents,
                     always_include_ids=current_state_ids,
@@ -509,7 +511,7 @@ class SyncHandler(object):
         Returns:
             A Deferred map from ((type, state_key)->Event)
         """
-        state_ids = yield self.store.get_state_ids_for_event(
+        state_ids = yield self.state_store.get_state_ids_for_event(
             event.event_id, state_filter=state_filter
         )
         if event.is_state():
@@ -580,7 +582,7 @@ class SyncHandler(object):
             return None
 
         last_event = last_events[-1]
-        state_ids = yield self.store.get_state_ids_for_event(
+        state_ids = yield self.state_store.get_state_ids_for_event(
             last_event.event_id,
             state_filter=StateFilter.from_types(
                 [(EventTypes.Name, ""), (EventTypes.CanonicalAlias, "")]
@@ -757,11 +759,11 @@ class SyncHandler(object):
 
             if full_state:
                 if batch:
-                    current_state_ids = yield self.store.get_state_ids_for_event(
+                    current_state_ids = yield self.state_store.get_state_ids_for_event(
                         batch.events[-1].event_id, state_filter=state_filter
                     )
 
-                    state_ids = yield self.store.get_state_ids_for_event(
+                    state_ids = yield self.state_store.get_state_ids_for_event(
                         batch.events[0].event_id, state_filter=state_filter
                     )
 
@@ -781,7 +783,7 @@ class SyncHandler(object):
                 )
             elif batch.limited:
                 if batch:
-                    state_at_timeline_start = yield self.store.get_state_ids_for_event(
+                    state_at_timeline_start = yield self.state_store.get_state_ids_for_event(
                         batch.events[0].event_id, state_filter=state_filter
                     )
                 else:
@@ -810,7 +812,7 @@ class SyncHandler(object):
                 )
 
                 if batch:
-                    current_state_ids = yield self.store.get_state_ids_for_event(
+                    current_state_ids = yield self.state_store.get_state_ids_for_event(
                         batch.events[-1].event_id, state_filter=state_filter
                     )
                 else:
@@ -841,7 +843,7 @@ class SyncHandler(object):
                         # So we fish out all the member events corresponding to the
                         # timeline here, and then dedupe any redundant ones below.
 
-                        state_ids = yield self.store.get_state_ids_for_event(
+                        state_ids = yield self.state_store.get_state_ids_for_event(
                             batch.events[0].event_id,
                             # we only want members!
                             state_filter=StateFilter.from_types(
diff --git a/synapse/http/client.py b/synapse/http/client.py
index cdf828a4ff..2df5b383b5 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -535,7 +535,7 @@ class SimpleHttpClient(object):
             b"Content-Length" in resp_headers
             and int(resp_headers[b"Content-Length"][0]) > max_size
         ):
-            logger.warn("Requested URL is too large > %r bytes" % (self.max_size,))
+            logger.warning("Requested URL is too large > %r bytes" % (self.max_size,))
             raise SynapseError(
                 502,
                 "Requested file is too large > %r bytes" % (self.max_size,),
@@ -543,7 +543,7 @@ class SimpleHttpClient(object):
             )
 
         if response.code > 299:
-            logger.warn("Got %d when downloading %s" % (response.code, url))
+            logger.warning("Got %d when downloading %s" % (response.code, url))
             raise SynapseError(502, "Got error %d" % (response.code,), Codes.UNKNOWN)
 
         # TODO: if our Content-Type is HTML or something, just read the first
diff --git a/synapse/http/federation/srv_resolver.py b/synapse/http/federation/srv_resolver.py
index 3fe4ffb9e5..021b233a7d 100644
--- a/synapse/http/federation/srv_resolver.py
+++ b/synapse/http/federation/srv_resolver.py
@@ -148,7 +148,7 @@ class SrvResolver(object):
             # Try something in the cache, else rereaise
             cache_entry = self._cache.get(service_name, None)
             if cache_entry:
-                logger.warn(
+                logger.warning(
                     "Failed to resolve %r, falling back to cache. %r", service_name, e
                 )
                 return list(cache_entry)
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 3f7c93ffcb..691380abda 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -149,7 +149,7 @@ def _handle_json_response(reactor, timeout_sec, request, response):
 
         body = yield make_deferred_yieldable(d)
     except Exception as e:
-        logger.warn(
+        logger.warning(
             "{%s} [%s] Error reading response: %s",
             request.txn_id,
             request.destination,
@@ -457,7 +457,7 @@ class MatrixFederationHttpClient(object):
                         except Exception as e:
                             # Eh, we're already going to raise an exception so lets
                             # ignore if this fails.
-                            logger.warn(
+                            logger.warning(
                                 "{%s} [%s] Failed to get error response: %s %s: %s",
                                 request.txn_id,
                                 request.destination,
@@ -478,7 +478,7 @@ class MatrixFederationHttpClient(object):
 
                     break
                 except RequestSendFailed as e:
-                    logger.warn(
+                    logger.warning(
                         "{%s} [%s] Request failed: %s %s: %s",
                         request.txn_id,
                         request.destination,
@@ -513,7 +513,7 @@ class MatrixFederationHttpClient(object):
                         raise
 
                 except Exception as e:
-                    logger.warn(
+                    logger.warning(
                         "{%s} [%s] Request failed: %s %s: %s",
                         request.txn_id,
                         request.destination,
@@ -889,7 +889,7 @@ class MatrixFederationHttpClient(object):
             d.addTimeout(self.default_timeout, self.reactor)
             length = yield make_deferred_yieldable(d)
         except Exception as e:
-            logger.warn(
+            logger.warning(
                 "{%s} [%s] Error reading response: %s",
                 request.txn_id,
                 request.destination,
diff --git a/synapse/http/request_metrics.py b/synapse/http/request_metrics.py
index 46af27c8f6..58f9cc61c8 100644
--- a/synapse/http/request_metrics.py
+++ b/synapse/http/request_metrics.py
@@ -170,7 +170,7 @@ class RequestMetrics(object):
             tag = context.tag
 
             if context != self.start_context:
-                logger.warn(
+                logger.warning(
                     "Context have unexpectedly changed %r, %r",
                     context,
                     self.start_context,
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 2ccb210fd6..943d12c907 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -454,7 +454,7 @@ def respond_with_json(
     # the Deferred fires, but since the flag is RIGHT THERE it seems like
     # a waste.
     if request._disconnected:
-        logger.warn(
+        logger.warning(
             "Not sending response to request %s, already disconnected.", request
         )
         return
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py
index 274c1a6a87..e9a5e46ced 100644
--- a/synapse/http/servlet.py
+++ b/synapse/http/servlet.py
@@ -219,13 +219,13 @@ def parse_json_value_from_request(request, allow_empty_body=False):
     try:
         content_unicode = content_bytes.decode("utf8")
     except UnicodeDecodeError:
-        logger.warn("Unable to decode UTF-8")
+        logger.warning("Unable to decode UTF-8")
         raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
 
     try:
         content = json.loads(content_unicode)
     except Exception as e:
-        logger.warn("Unable to parse JSON: %s", e)
+        logger.warning("Unable to parse JSON: %s", e)
         raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
 
     return content
diff --git a/synapse/http/site.py b/synapse/http/site.py
index df5274c177..ff8184a3d0 100644
--- a/synapse/http/site.py
+++ b/synapse/http/site.py
@@ -199,7 +199,7 @@ class SynapseRequest(Request):
         # It's useful to log it here so that we can get an idea of when
         # the client disconnects.
         with PreserveLoggingContext(self.logcontext):
-            logger.warn(
+            logger.warning(
                 "Error processing request %r: %s %s", self, reason.type, reason.value
             )
 
@@ -305,7 +305,7 @@ class SynapseRequest(Request):
         try:
             self.request_metrics.stop(self.finish_time, self.code, self.sentLength)
         except Exception as e:
-            logger.warn("Failed to stop metrics: %r", e)
+            logger.warning("Failed to stop metrics: %r", e)
 
 
 class XForwardedForRequest(SynapseRequest):
diff --git a/synapse/logging/context.py b/synapse/logging/context.py
index 370000e377..2c1fb9ddac 100644
--- a/synapse/logging/context.py
+++ b/synapse/logging/context.py
@@ -294,7 +294,7 @@ class LoggingContext(object):
         """Enters this logging context into thread local storage"""
         old_context = self.set_current_context(self)
         if self.previous_context != old_context:
-            logger.warn(
+            logger.warning(
                 "Expected previous context %r, found %r",
                 self.previous_context,
                 old_context,
diff --git a/synapse/notifier.py b/synapse/notifier.py
index 4e091314e6..af161a81d7 100644
--- a/synapse/notifier.py
+++ b/synapse/notifier.py
@@ -159,6 +159,7 @@ class Notifier(object):
         self.room_to_user_streams = {}
 
         self.hs = hs
+        self.storage = hs.get_storage()
         self.event_sources = hs.get_event_sources()
         self.store = hs.get_datastore()
         self.pending_new_room_events = []
@@ -425,7 +426,10 @@ class Notifier(object):
 
                 if name == "room":
                     new_events = yield filter_events_for_client(
-                        self.store, user.to_string(), new_events, is_peeking=is_peeking
+                        self.storage,
+                        user.to_string(),
+                        new_events,
+                        is_peeking=is_peeking,
                     )
                 elif name == "presence":
                     now = self.clock.time_msec()
diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index 6299587808..9a1bb64887 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -64,6 +64,7 @@ class HttpPusher(object):
     def __init__(self, hs, pusherdict):
         self.hs = hs
         self.store = self.hs.get_datastore()
+        self.storage = self.hs.get_storage()
         self.clock = self.hs.get_clock()
         self.state_handler = self.hs.get_state_handler()
         self.user_id = pusherdict["user_name"]
@@ -246,7 +247,7 @@ class HttpPusher(object):
                     # we really only give up so that if the URL gets
                     # fixed, we don't suddenly deliver a load
                     # of old notifications.
-                    logger.warn(
+                    logger.warning(
                         "Giving up on a notification to user %s, " "pushkey %s",
                         self.user_id,
                         self.pushkey,
@@ -299,7 +300,7 @@ class HttpPusher(object):
                 if pk != self.pushkey:
                     # for sanity, we only remove the pushkey if it
                     # was the one we actually sent...
-                    logger.warn(
+                    logger.warning(
                         ("Ignoring rejected pushkey %s because we" " didn't send it"),
                         pk,
                     )
@@ -329,7 +330,7 @@ class HttpPusher(object):
             return d
 
         ctx = yield push_tools.get_context_for_event(
-            self.store, self.state_handler, event, self.user_id
+            self.storage, self.state_handler, event, self.user_id
         )
 
         d = {
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index 5b16ab4ae8..1d15a06a58 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -119,6 +119,7 @@ class Mailer(object):
         self.store = self.hs.get_datastore()
         self.macaroon_gen = self.hs.get_macaroon_generator()
         self.state_handler = self.hs.get_state_handler()
+        self.storage = hs.get_storage()
         self.app_name = app_name
 
         logger.info("Created Mailer for app_name %s" % app_name)
@@ -389,7 +390,7 @@ class Mailer(object):
         }
 
         the_events = yield filter_events_for_client(
-            self.store, user_id, results["events_before"]
+            self.storage, user_id, results["events_before"]
         )
         the_events.append(notif_event)
 
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 5ed9147de4..b1587183a8 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -117,7 +117,7 @@ class PushRuleEvaluatorForEvent(object):
                 pattern = UserID.from_string(user_id).localpart
 
         if not pattern:
-            logger.warn("event_match condition with no pattern")
+            logger.warning("event_match condition with no pattern")
             return False
 
         # XXX: optimisation: cache our pattern regexps
@@ -173,7 +173,7 @@ def _glob_matches(glob, value, word_boundary=False):
             regex_cache[(glob, word_boundary)] = r
         return r.search(value)
     except re.error:
-        logger.warn("Failed to parse glob to regex: %r", glob)
+        logger.warning("Failed to parse glob to regex: %r", glob)
         return False
 
 
diff --git a/synapse/push/push_tools.py b/synapse/push/push_tools.py
index a54051a726..de5c101a58 100644
--- a/synapse/push/push_tools.py
+++ b/synapse/push/push_tools.py
@@ -16,6 +16,7 @@
 from twisted.internet import defer
 
 from synapse.push.presentable_names import calculate_room_name, name_from_member_event
+from synapse.storage import Storage
 
 
 @defer.inlineCallbacks
@@ -43,22 +44,22 @@ def get_badge_count(store, user_id):
 
 
 @defer.inlineCallbacks
-def get_context_for_event(store, state_handler, ev, user_id):
+def get_context_for_event(storage: Storage, state_handler, ev, user_id):
     ctx = {}
 
-    room_state_ids = yield store.get_state_ids_for_event(ev.event_id)
+    room_state_ids = yield storage.state.get_state_ids_for_event(ev.event_id)
 
     # we no longer bother setting room_alias, and make room_name the
     # human-readable name instead, be that m.room.name, an alias or
     # a list of people in the room
     name = yield calculate_room_name(
-        store, room_state_ids, user_id, fallback_to_single_member=False
+        storage.main, room_state_ids, user_id, fallback_to_single_member=False
     )
     if name:
         ctx["name"] = name
 
     sender_state_event_id = room_state_ids[("m.room.member", ev.sender)]
-    sender_state_event = yield store.get_event(sender_state_event_id)
+    sender_state_event = yield storage.main.get_event(sender_state_event_id)
     ctx["sender_display_name"] = name_from_member_event(sender_state_event)
 
     return ctx
diff --git a/synapse/replication/http/_base.py b/synapse/replication/http/_base.py
index 9be37cd998..c8056b0c0c 100644
--- a/synapse/replication/http/_base.py
+++ b/synapse/replication/http/_base.py
@@ -180,7 +180,7 @@ class ReplicationEndpoint(object):
                         if e.code != 504 or not cls.RETRY_ON_TIMEOUT:
                             raise
 
-                    logger.warn("%s request timed out", cls.NAME)
+                    logger.warning("%s request timed out", cls.NAME)
 
                     # If we timed out we probably don't need to worry about backing
                     # off too much, but lets just wait a little anyway.
diff --git a/synapse/replication/http/membership.py b/synapse/replication/http/membership.py
index b5f5f13a62..cc1f249740 100644
--- a/synapse/replication/http/membership.py
+++ b/synapse/replication/http/membership.py
@@ -144,7 +144,7 @@ class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint):
             # The 'except' clause is very broad, but we need to
             # capture everything from DNS failures upwards
             #
-            logger.warn("Failed to reject invite: %s", e)
+            logger.warning("Failed to reject invite: %s", e)
 
             await self.store.locally_reject_invite(user_id, room_id)
             ret = {}
diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py
index a44ceb00e7..563ce0fc53 100644
--- a/synapse/replication/tcp/client.py
+++ b/synapse/replication/tcp/client.py
@@ -168,7 +168,7 @@ class ReplicationClientHandler(object):
         if self.connection:
             self.connection.send_command(cmd)
         else:
-            logger.warn("Queuing command as not connected: %r", cmd.NAME)
+            logger.warning("Queuing command as not connected: %r", cmd.NAME)
             self.pending_commands.append(cmd)
 
     def send_federation_ack(self, token):
diff --git a/synapse/replication/tcp/protocol.py b/synapse/replication/tcp/protocol.py
index 5ffdf2675d..b64f3f44b5 100644
--- a/synapse/replication/tcp/protocol.py
+++ b/synapse/replication/tcp/protocol.py
@@ -249,7 +249,7 @@ class BaseReplicationStreamProtocol(LineOnlyReceiver):
         return handler(cmd)
 
     def close(self):
-        logger.warn("[%s] Closing connection", self.id())
+        logger.warning("[%s] Closing connection", self.id())
         self.time_we_closed = self.clock.time_msec()
         self.transport.loseConnection()
         self.on_connection_closed()
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index 939418ee2b..5c2a2eb593 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -286,7 +286,7 @@ class PurgeHistoryRestServlet(RestServlet):
                 room_id, stream_ordering
             )
             if not r:
-                logger.warn(
+                logger.warning(
                     "[purge] purging events not possible: No event found "
                     "(received_ts %i => stream_ordering %i)",
                     ts,
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index 8414af08cb..39a5c5e9de 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -221,7 +221,7 @@ class LoginRestServlet(RestServlet):
                 medium, address
             )
             if not user_id:
-                logger.warn(
+                logger.warning(
                     "unknown 3pid identifier medium %s, address %r", medium, address
                 )
                 raise LoginError(403, "", errcode=Codes.FORBIDDEN)
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 80cf7126a0..332d7138b1 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -71,7 +71,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
     def on_POST(self, request):
         if self.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "User password resets have been disabled due to lack of email config"
                 )
             raise SynapseError(
@@ -162,7 +162,7 @@ class PasswordResetSubmitTokenServlet(RestServlet):
             )
         if self.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "Password reset emails have been disabled due to lack of an email config"
                 )
             raise SynapseError(
@@ -183,7 +183,7 @@ class PasswordResetSubmitTokenServlet(RestServlet):
             # Perform a 302 redirect if next_link is set
             if next_link:
                 if next_link.startswith("file:///"):
-                    logger.warn(
+                    logger.warning(
                         "Not redirecting to next_link as it is a local file: address"
                     )
                 else:
@@ -350,7 +350,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
     def on_POST(self, request):
         if self.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "Adding emails have been disabled due to lack of an email config"
                 )
             raise SynapseError(
@@ -441,7 +441,7 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
             raise SynapseError(400, "MSISDN is already in use", Codes.THREEPID_IN_USE)
 
         if not self.hs.config.account_threepid_delegate_msisdn:
-            logger.warn(
+            logger.warning(
                 "No upstream msisdn account_threepid_delegate configured on the server to "
                 "handle this request"
             )
@@ -488,7 +488,7 @@ class AddThreepidEmailSubmitTokenServlet(RestServlet):
     def on_GET(self, request):
         if self.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "Adding emails have been disabled due to lack of an email config"
                 )
             raise SynapseError(
@@ -515,7 +515,7 @@ class AddThreepidEmailSubmitTokenServlet(RestServlet):
             # Perform a 302 redirect if next_link is set
             if next_link:
                 if next_link.startswith("file:///"):
-                    logger.warn(
+                    logger.warning(
                         "Not redirecting to next_link as it is a local file: address"
                     )
                 else:
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index 4f24a124a6..6c7d25d411 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -106,7 +106,7 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
     def on_POST(self, request):
         if self.hs.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.hs.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "Email registration has been disabled due to lack of email config"
                 )
             raise SynapseError(
@@ -207,7 +207,7 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
             )
 
         if not self.hs.config.account_threepid_delegate_msisdn:
-            logger.warn(
+            logger.warning(
                 "No upstream msisdn account_threepid_delegate configured on the server to "
                 "handle this request"
             )
@@ -266,7 +266,7 @@ class RegistrationSubmitTokenServlet(RestServlet):
             )
         if self.config.threepid_behaviour_email == ThreepidBehaviour.OFF:
             if self.config.local_threepid_handling_disabled_due_to_email_config:
-                logger.warn(
+                logger.warning(
                     "User registration via email has been disabled due to lack of email config"
                 )
             raise SynapseError(
@@ -287,7 +287,7 @@ class RegistrationSubmitTokenServlet(RestServlet):
             # Perform a 302 redirect if next_link is set
             if next_link:
                 if next_link.startswith("file:///"):
-                    logger.warn(
+                    logger.warning(
                         "Not redirecting to next_link as it is a local file: address"
                     )
                 else:
@@ -480,7 +480,7 @@ class RegisterRestServlet(RestServlet):
             # a password to work around a client bug where it sent
             # the 'initial_device_display_name' param alone, wiping out
             # the original registration params
-            logger.warn("Ignoring initial_device_display_name without password")
+            logger.warning("Ignoring initial_device_display_name without password")
             del body["initial_device_display_name"]
 
         session_id = self.auth_handler.get_session_id(body)
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 541a6b0e10..ccd8b17b23 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -394,7 +394,7 @@ class SyncRestServlet(RestServlet):
             # We've had bug reports that events were coming down under the
             # wrong room.
             if event.room_id != room.room_id:
-                logger.warn(
+                logger.warning(
                     "Event %r is under room %r instead of %r",
                     event.event_id,
                     room.room_id,
diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py
index b972e152a9..bd9186fe50 100644
--- a/synapse/rest/media/v1/media_repository.py
+++ b/synapse/rest/media/v1/media_repository.py
@@ -363,7 +363,7 @@ class MediaRepository(object):
                     },
                 )
             except RequestSendFailed as e:
-                logger.warn(
+                logger.warning(
                     "Request failed fetching remote media %s/%s: %r",
                     server_name,
                     media_id,
@@ -372,7 +372,7 @@ class MediaRepository(object):
                 raise SynapseError(502, "Failed to fetch remote media")
 
             except HttpResponseException as e:
-                logger.warn(
+                logger.warning(
                     "HTTP error fetching remote media %s/%s: %s",
                     server_name,
                     media_id,
@@ -383,10 +383,12 @@ class MediaRepository(object):
                 raise SynapseError(502, "Failed to fetch remote media")
 
             except SynapseError:
-                logger.warn("Failed to fetch remote media %s/%s", server_name, media_id)
+                logger.warning(
+                    "Failed to fetch remote media %s/%s", server_name, media_id
+                )
                 raise
             except NotRetryingDestination:
-                logger.warn("Not retrying destination %r", server_name)
+                logger.warning("Not retrying destination %r", server_name)
                 raise SynapseError(502, "Failed to fetch remote media")
             except Exception:
                 logger.exception(
@@ -691,7 +693,7 @@ class MediaRepository(object):
                 try:
                     os.remove(full_path)
                 except OSError as e:
-                    logger.warn("Failed to remove file: %r", full_path)
+                    logger.warning("Failed to remove file: %r", full_path)
                     if e.errno == errno.ENOENT:
                         pass
                     else:
diff --git a/synapse/rest/media/v1/preview_url_resource.py b/synapse/rest/media/v1/preview_url_resource.py
index 094ebad770..5a25b6b3fc 100644
--- a/synapse/rest/media/v1/preview_url_resource.py
+++ b/synapse/rest/media/v1/preview_url_resource.py
@@ -136,7 +136,7 @@ class PreviewUrlResource(DirectServeResource):
                         match = False
                         continue
             if match:
-                logger.warn("URL %s blocked by url_blacklist entry %s", url, entry)
+                logger.warning("URL %s blocked by url_blacklist entry %s", url, entry)
                 raise SynapseError(
                     403, "URL blocked by url pattern blacklist entry", Codes.UNKNOWN
                 )
@@ -208,7 +208,7 @@ class PreviewUrlResource(DirectServeResource):
                 og["og:image:width"] = dims["width"]
                 og["og:image:height"] = dims["height"]
             else:
-                logger.warn("Couldn't get dims for %s" % url)
+                logger.warning("Couldn't get dims for %s" % url)
 
             # define our OG response for this media
         elif _is_html(media_info["media_type"]):
@@ -256,7 +256,7 @@ class PreviewUrlResource(DirectServeResource):
                         og["og:image:width"] = dims["width"]
                         og["og:image:height"] = dims["height"]
                     else:
-                        logger.warn("Couldn't get dims for %s", og["og:image"])
+                        logger.warning("Couldn't get dims for %s", og["og:image"])
 
                     og["og:image"] = "mxc://%s/%s" % (
                         self.server_name,
@@ -267,7 +267,7 @@ class PreviewUrlResource(DirectServeResource):
                 else:
                     del og["og:image"]
         else:
-            logger.warn("Failed to find any OG data in %s", url)
+            logger.warning("Failed to find any OG data in %s", url)
             og = {}
 
         logger.debug("Calculated OG for %s as %s", url, og)
@@ -319,7 +319,7 @@ class PreviewUrlResource(DirectServeResource):
                 )
             except Exception as e:
                 # FIXME: pass through 404s and other error messages nicely
-                logger.warn("Error downloading %s: %r", url, e)
+                logger.warning("Error downloading %s: %r", url, e)
 
                 raise SynapseError(
                     500,
@@ -400,7 +400,7 @@ class PreviewUrlResource(DirectServeResource):
             except OSError as e:
                 # If the path doesn't exist, meh
                 if e.errno != errno.ENOENT:
-                    logger.warn("Failed to remove media: %r: %s", media_id, e)
+                    logger.warning("Failed to remove media: %r: %s", media_id, e)
                     continue
 
             removed_media.append(media_id)
@@ -432,7 +432,7 @@ class PreviewUrlResource(DirectServeResource):
             except OSError as e:
                 # If the path doesn't exist, meh
                 if e.errno != errno.ENOENT:
-                    logger.warn("Failed to remove media: %r: %s", media_id, e)
+                    logger.warning("Failed to remove media: %r: %s", media_id, e)
                     continue
 
             try:
@@ -448,7 +448,7 @@ class PreviewUrlResource(DirectServeResource):
             except OSError as e:
                 # If the path doesn't exist, meh
                 if e.errno != errno.ENOENT:
-                    logger.warn("Failed to remove media: %r: %s", media_id, e)
+                    logger.warning("Failed to remove media: %r: %s", media_id, e)
                     continue
 
             removed_media.append(media_id)
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py
index 08329884ac..931ce79be8 100644
--- a/synapse/rest/media/v1/thumbnail_resource.py
+++ b/synapse/rest/media/v1/thumbnail_resource.py
@@ -182,7 +182,7 @@ class ThumbnailResource(DirectServeResource):
         if file_path:
             yield respond_with_file(request, desired_type, file_path)
         else:
-            logger.warn("Failed to generate thumbnail")
+            logger.warning("Failed to generate thumbnail")
             respond_404(request)
 
     @defer.inlineCallbacks
@@ -245,7 +245,7 @@ class ThumbnailResource(DirectServeResource):
         if file_path:
             yield respond_with_file(request, desired_type, file_path)
         else:
-            logger.warn("Failed to generate thumbnail")
+            logger.warning("Failed to generate thumbnail")
             respond_404(request)
 
     @defer.inlineCallbacks
diff --git a/synapse/server_notices/resource_limits_server_notices.py b/synapse/server_notices/resource_limits_server_notices.py
index c0e7f475c9..9fae2e0afe 100644
--- a/synapse/server_notices/resource_limits_server_notices.py
+++ b/synapse/server_notices/resource_limits_server_notices.py
@@ -83,7 +83,7 @@ class ResourceLimitsServerNotices(object):
         room_id = yield self._server_notices_manager.get_notice_room_for_user(user_id)
 
         if not room_id:
-            logger.warn("Failed to get server notices room")
+            logger.warning("Failed to get server notices room")
             return
 
         yield self._check_and_set_tags(user_id, room_id)
diff --git a/synapse/spam_checker_api/__init__.py b/synapse/spam_checker_api/__init__.py
new file mode 100644
index 0000000000..efcc10f808
--- /dev/null
+++ b/synapse/spam_checker_api/__init__.py
@@ -0,0 +1,51 @@
+# -*- 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 twisted.internet import defer
+
+from synapse.storage.state import StateFilter
+
+logger = logging.getLogger(__name__)
+
+
+class SpamCheckerApi(object):
+    """A proxy object that gets passed to spam checkers so they can get
+    access to rooms and other relevant information.
+    """
+
+    def __init__(self, hs):
+        self.hs = hs
+
+        self._store = hs.get_datastore()
+
+    @defer.inlineCallbacks
+    def get_state_events_in_room(self, room_id, types):
+        """Gets state events for the given room.
+
+        Args:
+            room_id (string): The room ID to get state events in.
+            types (tuple): The event type and state key (using None
+                to represent 'any') of the room state to acquire.
+
+        Returns:
+            twisted.internet.defer.Deferred[list(synapse.events.FrozenEvent)]:
+                The filtered state events in the room.
+        """
+        state_ids = yield self._store.get_filtered_current_state_ids(
+            room_id=room_id, state_filter=StateFilter.from_types(types)
+        )
+        state = yield self._store.get_events(state_ids.values())
+        return state.values()
diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py
index dc9f5a9008..4e91eb66fe 100644
--- a/synapse/state/__init__.py
+++ b/synapse/state/__init__.py
@@ -103,6 +103,7 @@ class StateHandler(object):
     def __init__(self, hs):
         self.clock = hs.get_clock()
         self.store = hs.get_datastore()
+        self.state_store = hs.get_storage().state
         self.hs = hs
         self._state_resolution_handler = hs.get_state_resolution_handler()
 
@@ -271,7 +272,7 @@ class StateHandler(object):
             else:
                 current_state_ids = prev_state_ids
 
-            state_group = yield self.store.store_state_group(
+            state_group = yield self.state_store.store_state_group(
                 event.event_id,
                 event.room_id,
                 prev_group=None,
@@ -321,7 +322,7 @@ class StateHandler(object):
                 delta_ids = dict(entry.delta_ids)
                 delta_ids[key] = event.event_id
 
-            state_group = yield self.store.store_state_group(
+            state_group = yield self.state_store.store_state_group(
                 event.event_id,
                 event.room_id,
                 prev_group=prev_group,
@@ -334,7 +335,7 @@ class StateHandler(object):
             delta_ids = entry.delta_ids
 
             if entry.state_group is None:
-                entry.state_group = yield self.store.store_state_group(
+                entry.state_group = yield self.state_store.store_state_group(
                     event.event_id,
                     event.room_id,
                     prev_group=entry.prev_group,
@@ -376,14 +377,16 @@ class StateHandler(object):
         # map from state group id to the state in that state group (where
         # 'state' is a map from state key to event id)
         # dict[int, dict[(str, str), str]]
-        state_groups_ids = yield self.store.get_state_groups_ids(room_id, event_ids)
+        state_groups_ids = yield self.state_store.get_state_groups_ids(
+            room_id, event_ids
+        )
 
         if len(state_groups_ids) == 0:
             return _StateCacheEntry(state={}, state_group=None)
         elif len(state_groups_ids) == 1:
             name, state_list = list(state_groups_ids.items()).pop()
 
-            prev_group, delta_ids = yield self.store.get_state_group_delta(name)
+            prev_group, delta_ids = yield self.state_store.get_state_group_delta(name)
 
             return _StateCacheEntry(
                 state=state_list,
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index 3646ebd007..0460fe8cc9 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -31,6 +31,7 @@ from synapse.storage.data_stores import DataStores
 from synapse.storage.data_stores.main import DataStore
 from synapse.storage.persist_events import EventsPersistenceStorage
 from synapse.storage.purge_events import PurgeEventsStorage
+from synapse.storage.state import StateGroupStorage
 
 __all__ = ["DataStores", "DataStore"]
 
@@ -47,6 +48,7 @@ class Storage(object):
 
         self.persistence = EventsPersistenceStorage(hs, stores)
         self.purge_events = PurgeEventsStorage(hs, stores)
+        self.state = StateGroupStorage(hs, stores)
 
 
 def are_all_users_on_domain(txn, database_engine, domain):
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index f5906fcd54..1a2b7ebe25 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -494,7 +494,7 @@ class SQLBaseStore(object):
         exception_callbacks = []
 
         if LoggingContext.current_context() == LoggingContext.sentinel:
-            logger.warn("Starting db txn '%s' from sentinel context", desc)
+            logger.warning("Starting db txn '%s' from sentinel context", desc)
 
         try:
             result = yield self.runWithConnection(
@@ -532,7 +532,7 @@ class SQLBaseStore(object):
         """
         parent_context = LoggingContext.current_context()
         if parent_context == LoggingContext.sentinel:
-            logger.warn(
+            logger.warning(
                 "Starting db connection from sentinel context: metrics will be lost"
             )
             parent_context = None
@@ -719,7 +719,7 @@ class SQLBaseStore(object):
                     raise
 
                 # presumably we raced with another transaction: let's retry.
-                logger.warn(
+                logger.warning(
                     "IntegrityError when upserting into %s; retrying: %s", table, e
                 )
 
diff --git a/synapse/storage/data_stores/main/events.py b/synapse/storage/data_stores/main/events.py
index 4eacba8058..63b09a09e8 100644
--- a/synapse/storage/data_stores/main/events.py
+++ b/synapse/storage/data_stores/main/events.py
@@ -82,7 +82,7 @@ def _retry_on_integrity_error(func):
     @defer.inlineCallbacks
     def f(self, *args, **kwargs):
         try:
-            res = yield func(self, *args, **kwargs)
+            res = yield func(self, *args, delete_existing=False, **kwargs)
         except self.database_engine.module.IntegrityError:
             logger.exception("IntegrityError, retrying.")
             res = yield func(self, *args, delete_existing=True, **kwargs)
@@ -1669,7 +1669,6 @@ class EventsStore(
             "room_stats_earliest_token",
             "rooms",
             "stream_ordering_to_exterm",
-            "topics",
             "users_in_public_rooms",
             "users_who_share_private_rooms",
             # no useful index, but let's clear them anyway
diff --git a/synapse/storage/data_stores/main/pusher.py b/synapse/storage/data_stores/main/pusher.py
index f005c1ae0a..d76861cdc0 100644
--- a/synapse/storage/data_stores/main/pusher.py
+++ b/synapse/storage/data_stores/main/pusher.py
@@ -44,7 +44,7 @@ class PusherWorkerStore(SQLBaseStore):
 
                 r["data"] = json.loads(dataJson)
             except Exception as e:
-                logger.warn(
+                logger.warning(
                     "Invalid JSON in data for pusher %d: %s, %s",
                     r["id"],
                     dataJson,
diff --git a/synapse/storage/data_stores/main/search.py b/synapse/storage/data_stores/main/search.py
index 0e08497452..a59b8331e1 100644
--- a/synapse/storage/data_stores/main/search.py
+++ b/synapse/storage/data_stores/main/search.py
@@ -196,7 +196,7 @@ class SearchBackgroundUpdateStore(BackgroundUpdateStore):
                         " ON event_search USING GIN (vector)"
                     )
                 except psycopg2.ProgrammingError as e:
-                    logger.warn(
+                    logger.warning(
                         "Ignoring error %r when trying to switch from GIST to GIN", e
                     )
 
diff --git a/synapse/storage/persist_events.py b/synapse/storage/persist_events.py
index cf66225574..fa03ca9ff7 100644
--- a/synapse/storage/persist_events.py
+++ b/synapse/storage/persist_events.py
@@ -260,9 +260,7 @@ class EventsPersistenceStorage(object):
         self._event_persist_queue.handle_queue(room_id, persisting_queue)
 
     @defer.inlineCallbacks
-    def _persist_events(
-        self, events_and_contexts, backfilled=False, delete_existing=False
-    ):
+    def _persist_events(self, events_and_contexts, backfilled=False):
         """Calculates the change to current state and forward extremities, and
         persists the given events and with those updates.
 
@@ -412,7 +410,6 @@ class EventsPersistenceStorage(object):
                 state_delta_for_room=state_delta_for_room,
                 new_forward_extremeties=new_forward_extremeties,
                 backfilled=backfilled,
-                delete_existing=delete_existing,
             )
 
     @defer.inlineCallbacks
@@ -550,7 +547,7 @@ class EventsPersistenceStorage(object):
 
         if missing_event_ids:
             # Now pull out the state groups for any missing events from DB
-            event_to_groups = yield self.state_store._get_state_group_for_events(
+            event_to_groups = yield self.main_store._get_state_group_for_events(
                 missing_event_ids
             )
             event_id_to_state_group.update(event_to_groups)
diff --git a/synapse/storage/state.py b/synapse/storage/state.py
index a2df8fa827..3735846899 100644
--- a/synapse/storage/state.py
+++ b/synapse/storage/state.py
@@ -19,6 +19,8 @@ from six import iteritems, itervalues
 
 import attr
 
+from twisted.internet import defer
+
 from synapse.api.constants import EventTypes
 
 logger = logging.getLogger(__name__)
@@ -322,3 +324,234 @@ class StateFilter(object):
         )
 
         return member_filter, non_member_filter
+
+
+class StateGroupStorage(object):
+    """High level interface to fetching state for event.
+    """
+
+    def __init__(self, hs, stores):
+        self.stores = stores
+
+    def get_state_group_delta(self, state_group):
+        """Given a state group try to return a previous group and a delta between
+        the old and the new.
+
+        Returns:
+            Deferred[Tuple[Optional[int], Optional[list[dict[tuple[str, str], str]]]]]):
+                (prev_group, delta_ids)
+        """
+
+        return self.stores.main.get_state_group_delta(state_group)
+
+    @defer.inlineCallbacks
+    def get_state_groups_ids(self, _room_id, event_ids):
+        """Get the event IDs of all the state for the state groups for the given events
+
+        Args:
+            _room_id (str): id of the room for these events
+            event_ids (iterable[str]): ids of the events
+
+        Returns:
+            Deferred[dict[int, dict[tuple[str, str], str]]]:
+                dict of state_group_id -> (dict of (type, state_key) -> event id)
+        """
+        if not event_ids:
+            return {}
+
+        event_to_groups = yield self.stores.main._get_state_group_for_events(event_ids)
+
+        groups = set(itervalues(event_to_groups))
+        group_to_state = yield self.stores.main._get_state_for_groups(groups)
+
+        return group_to_state
+
+    @defer.inlineCallbacks
+    def get_state_ids_for_group(self, state_group):
+        """Get the event IDs of all the state in the given state group
+
+        Args:
+            state_group (int)
+
+        Returns:
+            Deferred[dict]: Resolves to a map of (type, state_key) -> event_id
+        """
+        group_to_state = yield self._get_state_for_groups((state_group,))
+
+        return group_to_state[state_group]
+
+    @defer.inlineCallbacks
+    def get_state_groups(self, room_id, event_ids):
+        """ Get the state groups for the given list of event_ids
+        Returns:
+            Deferred[dict[int, list[EventBase]]]:
+                dict of state_group_id -> list of state events.
+        """
+        if not event_ids:
+            return {}
+
+        group_to_ids = yield self.get_state_groups_ids(room_id, event_ids)
+
+        state_event_map = yield self.stores.main.get_events(
+            [
+                ev_id
+                for group_ids in itervalues(group_to_ids)
+                for ev_id in itervalues(group_ids)
+            ],
+            get_prev_content=False,
+        )
+
+        return {
+            group: [
+                state_event_map[v]
+                for v in itervalues(event_id_map)
+                if v in state_event_map
+            ]
+            for group, event_id_map in iteritems(group_to_ids)
+        }
+
+    def _get_state_groups_from_groups(self, groups, state_filter):
+        """Returns the state groups for a given set of groups, filtering on
+        types of state events.
+
+        Args:
+            groups(list[int]): list of state group IDs to query
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+        Returns:
+            Deferred[dict[int, dict[tuple[str, str], str]]]:
+                dict of state_group_id -> (dict of (type, state_key) -> event id)
+        """
+
+        return self.stores.main._get_state_groups_from_groups(groups, state_filter)
+
+    @defer.inlineCallbacks
+    def get_state_for_events(self, event_ids, state_filter=StateFilter.all()):
+        """Given a list of event_ids and type tuples, return a list of state
+        dicts for each event.
+        Args:
+            event_ids (list[string])
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+        Returns:
+            deferred: A dict of (event_id) -> (type, state_key) -> [state_events]
+        """
+        event_to_groups = yield self.stores.main._get_state_group_for_events(event_ids)
+
+        groups = set(itervalues(event_to_groups))
+        group_to_state = yield self.stores.main._get_state_for_groups(
+            groups, state_filter
+        )
+
+        state_event_map = yield self.stores.main.get_events(
+            [ev_id for sd in itervalues(group_to_state) for ev_id in itervalues(sd)],
+            get_prev_content=False,
+        )
+
+        event_to_state = {
+            event_id: {
+                k: state_event_map[v]
+                for k, v in iteritems(group_to_state[group])
+                if v in state_event_map
+            }
+            for event_id, group in iteritems(event_to_groups)
+        }
+
+        return {event: event_to_state[event] for event in event_ids}
+
+    @defer.inlineCallbacks
+    def get_state_ids_for_events(self, event_ids, state_filter=StateFilter.all()):
+        """
+        Get the state dicts corresponding to a list of events, containing the event_ids
+        of the state events (as opposed to the events themselves)
+
+        Args:
+            event_ids(list(str)): events whose state should be returned
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+
+        Returns:
+            A deferred dict from event_id -> (type, state_key) -> event_id
+        """
+        event_to_groups = yield self.stores.main._get_state_group_for_events(event_ids)
+
+        groups = set(itervalues(event_to_groups))
+        group_to_state = yield self.stores.main._get_state_for_groups(
+            groups, state_filter
+        )
+
+        event_to_state = {
+            event_id: group_to_state[group]
+            for event_id, group in iteritems(event_to_groups)
+        }
+
+        return {event: event_to_state[event] for event in event_ids}
+
+    @defer.inlineCallbacks
+    def get_state_for_event(self, event_id, state_filter=StateFilter.all()):
+        """
+        Get the state dict corresponding to a particular event
+
+        Args:
+            event_id(str): event whose state should be returned
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+
+        Returns:
+            A deferred dict from (type, state_key) -> state_event
+        """
+        state_map = yield self.get_state_for_events([event_id], state_filter)
+        return state_map[event_id]
+
+    @defer.inlineCallbacks
+    def get_state_ids_for_event(self, event_id, state_filter=StateFilter.all()):
+        """
+        Get the state dict corresponding to a particular event
+
+        Args:
+            event_id(str): event whose state should be returned
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+
+        Returns:
+            A deferred dict from (type, state_key) -> state_event
+        """
+        state_map = yield self.get_state_ids_for_events([event_id], state_filter)
+        return state_map[event_id]
+
+    def _get_state_for_groups(self, groups, state_filter=StateFilter.all()):
+        """Gets the state at each of a list of state groups, optionally
+        filtering by type/state_key
+
+        Args:
+            groups (iterable[int]): list of state groups for which we want
+                to get the state.
+            state_filter (StateFilter): The state filter used to fetch state
+                from the database.
+        Returns:
+            Deferred[dict[int, dict[tuple[str, str], str]]]:
+                dict of state_group_id -> (dict of (type, state_key) -> event id)
+        """
+        return self.stores.main._get_state_for_groups(groups, state_filter)
+
+    def store_state_group(
+        self, event_id, room_id, prev_group, delta_ids, current_state_ids
+    ):
+        """Store a new set of state, returning a newly assigned state group.
+
+        Args:
+            event_id (str): The event ID for which the state was calculated
+            room_id (str)
+            prev_group (int|None): A previous state group for the room, optional.
+            delta_ids (dict|None): The delta between state at `prev_group` and
+                `current_state_ids`, if `prev_group` was given. Same format as
+                `current_state_ids`.
+            current_state_ids (dict): The state to store. Map of (type, state_key)
+                to event_id.
+
+        Returns:
+            Deferred[int]: The state group ID
+        """
+        return self.stores.main.store_state_group(
+            event_id, room_id, prev_group, delta_ids, current_state_ids
+        )
diff --git a/synapse/util/async_helpers.py b/synapse/util/async_helpers.py
index b60a604474..5c4de2e69f 100644
--- a/synapse/util/async_helpers.py
+++ b/synapse/util/async_helpers.py
@@ -309,7 +309,7 @@ class Linearizer(object):
                 )
 
             else:
-                logger.warn(
+                logger.warning(
                     "Unexpected exception waiting for linearizer lock %r for key %r",
                     self.name,
                     key,
diff --git a/synapse/util/caches/__init__.py b/synapse/util/caches/__init__.py
index 43fd65d693..da5077b471 100644
--- a/synapse/util/caches/__init__.py
+++ b/synapse/util/caches/__init__.py
@@ -107,7 +107,7 @@ def register_cache(cache_type, cache_name, cache, collect_callback=None):
                 if collect_callback:
                     collect_callback()
             except Exception as e:
-                logger.warn("Error calculating metrics for %s: %s", cache_name, e)
+                logger.warning("Error calculating metrics for %s: %s", cache_name, e)
                 raise
 
             yield GaugeMetricFamily("__unused", "")
diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py
index 4b1bcdf23c..3286804322 100644
--- a/synapse/util/metrics.py
+++ b/synapse/util/metrics.py
@@ -119,7 +119,7 @@ class Measure(object):
         context = LoggingContext.current_context()
 
         if context != self.start_context:
-            logger.warn(
+            logger.warning(
                 "Context has unexpectedly changed from '%s' to '%s'. (%r)",
                 self.start_context,
                 context,
@@ -128,7 +128,7 @@ class Measure(object):
             return
 
         if not context:
-            logger.warn("Expected context. (%r)", self.name)
+            logger.warning("Expected context. (%r)", self.name)
             return
 
         current = context.get_resource_usage()
@@ -140,7 +140,7 @@ class Measure(object):
             block_db_txn_duration.labels(self.name).inc(usage.db_txn_duration_sec)
             block_db_sched_duration.labels(self.name).inc(usage.db_sched_duration_sec)
         except ValueError:
-            logger.warn(
+            logger.warning(
                 "Failed to save metrics! OLD: %r, NEW: %r", self.start_usage, current
             )
 
diff --git a/synapse/util/rlimit.py b/synapse/util/rlimit.py
index 6c0f2bb0cf..207cd17c2a 100644
--- a/synapse/util/rlimit.py
+++ b/synapse/util/rlimit.py
@@ -33,4 +33,4 @@ def change_resource_limit(soft_file_no):
             resource.RLIMIT_CORE, (resource.RLIM_INFINITY, resource.RLIM_INFINITY)
         )
     except (ValueError, resource.error) as e:
-        logger.warn("Failed to set file or core limit: %s", e)
+        logger.warning("Failed to set file or core limit: %s", e)
diff --git a/synapse/visibility.py b/synapse/visibility.py
index bf0f1eebd8..8c843febd8 100644
--- a/synapse/visibility.py
+++ b/synapse/visibility.py
@@ -23,6 +23,7 @@ from twisted.internet import defer
 
 from synapse.api.constants import EventTypes, Membership
 from synapse.events.utils import prune_event
+from synapse.storage import Storage
 from synapse.storage.state import StateFilter
 from synapse.types import get_domain_from_id
 
@@ -43,14 +44,13 @@ MEMBERSHIP_PRIORITY = (
 
 @defer.inlineCallbacks
 def filter_events_for_client(
-    store, user_id, events, is_peeking=False, always_include_ids=frozenset()
+    storage: Storage, user_id, events, is_peeking=False, always_include_ids=frozenset()
 ):
     """
     Check which events a user is allowed to see
 
     Args:
-        store (synapse.storage.DataStore): our datastore (can also be a worker
-            store)
+        storage
         user_id(str): user id to be checked
         events(list[synapse.events.EventBase]): sequence of events to be checked
         is_peeking(bool): should be True if:
@@ -68,12 +68,12 @@ def filter_events_for_client(
     events = list(e for e in events if not e.internal_metadata.is_soft_failed())
 
     types = ((EventTypes.RoomHistoryVisibility, ""), (EventTypes.Member, user_id))
-    event_id_to_state = yield store.get_state_for_events(
+    event_id_to_state = yield storage.state.get_state_for_events(
         frozenset(e.event_id for e in events),
         state_filter=StateFilter.from_types(types),
     )
 
-    ignore_dict_content = yield store.get_global_account_data_by_type_for_user(
+    ignore_dict_content = yield storage.main.get_global_account_data_by_type_for_user(
         "m.ignored_user_list", user_id
     )
 
@@ -84,7 +84,7 @@ def filter_events_for_client(
         else []
     )
 
-    erased_senders = yield store.are_users_erased((e.sender for e in events))
+    erased_senders = yield storage.main.are_users_erased((e.sender for e in events))
 
     def allowed(event):
         """
@@ -213,13 +213,17 @@ def filter_events_for_client(
 
 @defer.inlineCallbacks
 def filter_events_for_server(
-    store, server_name, events, redact=True, check_history_visibility_only=False
+    storage: Storage,
+    server_name,
+    events,
+    redact=True,
+    check_history_visibility_only=False,
 ):
     """Filter a list of events based on whether given server is allowed to
     see them.
 
     Args:
-        store (DataStore)
+        storage
         server_name (str)
         events (iterable[FrozenEvent])
         redact (bool): Whether to return a redacted version of the event, or
@@ -274,7 +278,7 @@ def filter_events_for_server(
     # Lets check to see if all the events have a history visibility
     # of "shared" or "world_readable". If thats the case then we don't
     # need to check membership (as we know the server is in the room).
-    event_to_state_ids = yield store.get_state_ids_for_events(
+    event_to_state_ids = yield storage.state.get_state_ids_for_events(
         frozenset(e.event_id for e in events),
         state_filter=StateFilter.from_types(
             types=((EventTypes.RoomHistoryVisibility, ""),)
@@ -292,14 +296,14 @@ def filter_events_for_server(
     if not visibility_ids:
         all_open = True
     else:
-        event_map = yield store.get_events(visibility_ids)
+        event_map = yield storage.main.get_events(visibility_ids)
         all_open = all(
             e.content.get("history_visibility") in (None, "shared", "world_readable")
             for e in itervalues(event_map)
         )
 
     if not check_history_visibility_only:
-        erased_senders = yield store.are_users_erased((e.sender for e in events))
+        erased_senders = yield storage.main.are_users_erased((e.sender for e in events))
     else:
         # We don't want to check whether users are erased, which is equivalent
         # to no users having been erased.
@@ -328,7 +332,7 @@ def filter_events_for_server(
 
     # first, for each event we're wanting to return, get the event_ids
     # of the history vis and membership state at those events.
-    event_to_state_ids = yield store.get_state_ids_for_events(
+    event_to_state_ids = yield storage.state.get_state_ids_for_events(
         frozenset(e.event_id for e in events),
         state_filter=StateFilter.from_types(
             types=((EventTypes.RoomHistoryVisibility, ""), (EventTypes.Member, None))
@@ -358,7 +362,7 @@ def filter_events_for_server(
             return False
         return state_key[idx + 1 :] == server_name
 
-    event_map = yield store.get_events(
+    event_map = yield storage.main.get_events(
         [
             e_id
             for e_id, key in iteritems(event_id_to_state_key)