async/await get_user_id_by_threepid (#7620)

Based on #7619 

async's `get_user_id_by_threepid` and its call stack.

changelog.d/7620.misc

@@ -0,0 +1 @@
+Convert `get_user_id_by_threepid` to async/await.

synapse/app/homeserver.py

@@ -617,18 +617,17 @@ def reap_monthly_active_users():
     clock.looping_call(reap_monthly_active_users, 1000 * 60 * 60)
     reap_monthly_active_users()
 
-    @defer.inlineCallbacks
-    def generate_monthly_active_users():
+    async def generate_monthly_active_users():
         current_mau_count = 0
         current_mau_count_by_service = {}
         reserved_users = ()
         store = hs.get_datastore()
         if hs.config.limit_usage_by_mau or hs.config.mau_stats_only:
-            current_mau_count = yield store.get_monthly_active_count()
+            current_mau_count = await store.get_monthly_active_count()
             current_mau_count_by_service = (
-                yield store.get_monthly_active_count_by_service()
+                await store.get_monthly_active_count_by_service()
             )
-            reserved_users = yield store.get_registered_reserved_users()
+            reserved_users = await store.get_registered_reserved_users()
         current_mau_gauge.set(float(current_mau_count))
 
         for app_service, count in current_mau_count_by_service.items():

synapse/storage/data_stores/main/monthly_active_users.py

@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+from typing import List
 
 from twisted.internet import defer
 
@@ -77,20 +78,19 @@ def _count_users_by_service(txn):
 
         return self.db.runInteraction("count_users_by_service", _count_users_by_service)
 
-    @defer.inlineCallbacks
-    def get_registered_reserved_users(self):
-        """Of the reserved threepids defined in config, which are associated
-        with registered users?
+    async def get_registered_reserved_users(self) -> List[str]:
+        """Of the reserved threepids defined in config, retrieve those that are associated
+        with registered users
 
         Returns:
-            Defered[list]: Real reserved users
+            User IDs of actual users that are reserved
         """
         users = []
 
         for tp in self.hs.config.mau_limits_reserved_threepids[
             : self.hs.config.max_mau_value
         ]:
-            user_id = yield self.hs.get_datastore().get_user_id_by_threepid(
+            user_id = await self.hs.get_datastore().get_user_id_by_threepid(
                 tp["medium"], tp["address"]
             )
             if user_id:
@@ -171,13 +171,9 @@ def _initialise_reserved_users(self, txn, threepids):
             else:
                 logger.warning("mau limit reserved threepid %s not found in db" % tp)
 
-    @defer.inlineCallbacks
-    def reap_monthly_active_users(self):
+    async def reap_monthly_active_users(self):
         """Cleans out monthly active user table to ensure that no stale
         entries exist.
-
-        Returns:
-            Deferred[]
         """
 
         def _reap_users(txn, reserved_users):
@@ -249,8 +245,8 @@ def _reap_users(txn, reserved_users):
             )
             self._invalidate_cache_and_stream(txn, self.get_monthly_active_count, ())
 
-        reserved_users = yield self.get_registered_reserved_users()
-        yield self.db.runInteraction(
+        reserved_users = await self.get_registered_reserved_users()
+        await self.db.runInteraction(
             "reap_monthly_active_users", _reap_users, reserved_users
         )
 
@@ -261,6 +257,9 @@ def upsert_monthly_active_user(self, user_id):
 
         Args:
             user_id (str): user to add/update
+
+        Returns:
+            Deferred
         """
         # Support user never to be included in MAU stats. Note I can't easily call this
         # from upsert_monthly_active_user_txn because then I need a _txn form of

synapse/storage/data_stores/main/registration.py

@@ -17,6 +17,7 @@
 
 import logging
 import re
+from typing import Optional
 
 from six import iterkeys
 
@@ -342,7 +343,7 @@ def is_real_user(self, user_id):
         )
         return res
 
-    @cachedInlineCallbacks()
+    @cached()
     def is_support_user(self, user_id):
         """Determines if the user is of type UserTypes.SUPPORT
 
@@ -352,10 +353,9 @@ def is_support_user(self, user_id):
         Returns:
             Deferred[bool]: True if user is of type UserTypes.SUPPORT
         """
-        res = yield self.db.runInteraction(
+        return self.db.runInteraction(
             "is_support_user", self.is_support_user_txn, user_id
         )
-        return res
 
     def is_real_user_txn(self, txn, user_id):
         res = self.db.simple_select_one_onecol_txn(
@@ -516,18 +516,17 @@ def _find_next_generated_user_id(txn):
             )
         )
 
-    @defer.inlineCallbacks
-    def get_user_id_by_threepid(self, medium, address):
+    async def get_user_id_by_threepid(self, medium: str, address: str) -> Optional[str]:
         """Returns user id from threepid
 
         Args:
-            medium (str): threepid medium e.g. email
-            address (str): threepid address e.g. me@example.com
+            medium: threepid medium e.g. email
+            address: threepid address e.g. me@example.com
 
         Returns:
-            Deferred[str|None]: user id or None if no user id/threepid mapping exists
+            The user ID or None if no user id/threepid mapping exists
         """
-        user_id = yield self.db.runInteraction(
+        user_id = await self.db.runInteraction(
             "get_user_id_by_threepid", self.get_user_id_by_threepid_txn, medium, address
         )
         return user_id
@@ -993,7 +992,7 @@ def register_user(
 
         Args:
             user_id (str): The desired user ID to register.
-            password_hash (str): Optional. The password hash for this user.
+            password_hash (str|None): Optional. The password hash for this user.
             was_guest (bool): Optional. Whether this is a guest account being
                 upgraded to a non-guest account.
             make_guest (boolean): True if the the new user should be guest,
@@ -1007,6 +1006,9 @@ def register_user(
 
         Raises:
             StoreError if the user_id could not be registered.
+
+        Returns:
+            Deferred
         """
         return self.db.runInteraction(
             "register_user",