Async get event cache prep (#13242)

Some experimental prep work to enable external event caching based on #9379 & #12955. Doesn't actually move the cache at all, just lays the groundwork for async implemented caches.

Signed off by Nick @ Beeper (@Fizzadar)

1 files changed, 3 insertions, 1 deletions

diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py

index 71a65d565a..105a518677 100644
--- a/synapse/storage/databases/main/roommember.py
+++ b/synapse/storage/databases/main/roommember.py
@@ -843,7 +843,9 @@ class RoomMemberWorkerStore(EventsWorkerStore):
         # We don't update the event cache hit ratio as it completely throws off
         # the hit ratio counts. After all, we don't populate the cache if we
         # miss it here
-        event_map = self._get_events_from_cache(member_event_ids, update_metrics=False)
+        event_map = await self._get_events_from_cache(
+            member_event_ids, update_metrics=False
+        )
 
         missing_member_event_ids = []
         for event_id in member_event_ids: