diff --git a/synapse/storage/databases/main/events_forward_extremities.py b/synapse/storage/databases/main/events_forward_extremities.py
index cc684a94fe..6b8da52fee 100644
--- a/synapse/storage/databases/main/events_forward_extremities.py
+++ b/synapse/storage/databases/main/events_forward_extremities.py
@@ -1,15 +1,22 @@
-from typing import List, Dict
+import logging
+from typing import Dict, List
+from synapse.api.errors import SynapseError
from synapse.storage._base import SQLBaseStore
+logger = logging.getLogger(__name__)
-class EventForwardExtremitiesStore(SQLBaseStore):
+class EventForwardExtremitiesStore(SQLBaseStore):
async def delete_forward_extremities_for_room(self, room_id: str) -> int:
"""Delete any extra forward extremities for a room.
+ Invalidates the "get_latest_event_ids_in_room" cache if any forward
+ extremities were deleted.
+
Returns count deleted.
"""
+
def delete_forward_extremities_for_room_txn(txn):
# First we need to get the event_id to not delete
sql = (
@@ -27,9 +34,17 @@ class EventForwardExtremitiesStore(SQLBaseStore):
)
txn.execute(sql, (room_id,))
rows = txn.fetchall()
-
- # TODO: should this raise a SynapseError instead of better to blow?
- event_id = rows[0][0]
+ try:
+ event_id = rows[0][0]
+ logger.debug(
+ "Found event_id %s as the forward extremity to keep for room %s",
+ event_id,
+ room_id,
+ )
+ except KeyError:
+ msg = f"No forward extremity event found for room {room_id}"
+ logger.warning(msg)
+ raise SynapseError(400, msg)
# Now delete the extra forward extremities
sql = (
@@ -39,19 +54,29 @@ class EventForwardExtremitiesStore(SQLBaseStore):
" AND room_id = ?"
)
- # TODO we should not commit yet
txn.execute(sql, (event_id, room_id))
+ logger.info(
+ "Deleted %s extra forward extremities for room %s",
+ txn.rowcount,
+ room_id,
+ )
- # TODO flush the cache then commit
+ if txn.rowcount > 0:
+ # Invalidate the cache
+ self._invalidate_cache_and_stream(
+ txn, self.get_latest_event_ids_in_room, (room_id,),
+ )
return txn.rowcount
return await self.db_pool.runInteraction(
- "delete_forward_extremities_for_room", delete_forward_extremities_for_room_txn,
+ "delete_forward_extremities_for_room",
+ delete_forward_extremities_for_room_txn,
)
async def get_forward_extremities_for_room(self, room_id: str) -> List[Dict]:
"""Get list of forward extremities for a room."""
+
def get_forward_extremities_for_room_txn(txn):
sql = (
"SELECT event_id, state_group FROM event_forward_extremities NATURAL JOIN event_to_state_groups "
|
