Add an API for listing threads in a room. (#13394)

Implement the /threads endpoint from MSC3856.

This is currently unstable and behind an experimental configuration
flag.

It includes a background update to backfill data, results from
the /threads endpoint will be partial until that finishes.

1 files changed, 1 insertions, 0 deletions

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

index a9f25a5904..0ce3156c9c 100644
--- a/synapse/storage/databases/main/cache.py
+++ b/synapse/storage/databases/main/cache.py
@@ -259,6 +259,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
             self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,))
             self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,))
             self._attempt_to_invalidate_cache("get_thread_participated", (relates_to,))
+            self._attempt_to_invalidate_cache("get_threads", (room_id,))
 
     async def invalidate_cache_and_stream(
         self, cache_name: str, keys: Tuple[Any, ...]