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Faster room joins: Avoid blocking /keys/changes (#13888)

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Part of the work for #12993.

Once #12993 is fully resolved, we expect `/keys/changes` to behave
sensibly when joined to a room with partial state.

Signed-off-by: Sean Quah <seanq@matrix.org>
This commit is contained in:
Sean Quah 2022-09-23 17:55:15 +01:00 committed by GitHub
parent db868db594
commit f49f73c0da
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3 changed files with 12 additions and 3 deletions
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1
changelog.d/13888.misc Normal file
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@ -0,0 +1 @@
Faster room joins: Avoid waiting for full state when processing `/keys/changes` requests.

7
synapse/handlers/device.py
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@ -195,7 +195,9 @@ class DeviceWorkerHandler:
possibly_changed = set(changed)
possibly_left = set()
for room_id in rooms_changed:
current_state_ids = await self._state_storage.get_current_state_ids(room_id)
current_state_ids = await self._state_storage.get_current_state_ids(
room_id, await_full_state=False
)
# The user may have left the room
# TODO: Check if they actually did or if we were just invited.
@ -234,7 +236,8 @@ class DeviceWorkerHandler:
# mapping from event_id -> state_dict
prev_state_ids = await self._state_storage.get_state_ids_for_events(
event_ids
event_ids,
await_full_state=False,
)
# Check if we've joined the room? If so we just blindly add all the users to

7
synapse/storage/controllers/state.py
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@ -407,6 +407,7 @@ class StateStorageController:
self,
room_id: str,
state_filter: Optional[StateFilter] = None,
await_full_state: bool = True,
on_invalidate: Optional[Callable[[], None]] = None,
) -> StateMap[str]:
"""Get the current state event ids for a room based on the
@ -419,13 +420,17 @@ class StateStorageController:
room_id: The room to get the state IDs of. state_filter: The state
filter used to fetch state from the
database.
await_full_state: if true, will block if we do not yet have complete
state for the room.
on_invalidate: Callback for when the `get_current_state_ids` cache
for the room gets invalidated.
Returns:
The current state of the room.
"""
if not state_filter or state_filter.must_await_full_state(self._is_mine_id):
if await_full_state and (
not state_filter or state_filter.must_await_full_state(self._is_mine_id)
):
await self._partial_state_room_tracker.await_full_state(room_id)
if state_filter and not state_filter.is_full():