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Batch up notifications after event persistence (#14033)

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Shay 2022-10-05 10:12:48 -07:00 committed by GitHub
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commit 7b7478e8b6
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5 changed files with 66 additions and 58 deletions
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1
changelog.d/14033.misc Normal file
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@ -0,0 +1 @@
Don't repeatedly wake up the same users for batched events.

4
synapse/handlers/federation_event.py
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@ -2240,8 +2240,8 @@ class FederationEventHandler:
event_pos = PersistedEventPosition(
self._instance_name, event.internal_metadata.stream_ordering
)
await self._notifier.on_new_room_event(
event, event_pos, max_stream_token, extra_users=extra_users
await self._notifier.on_new_room_events(
[(event, event_pos)], max_stream_token, extra_users=extra_users
)
if event.type == EventTypes.Member and event.membership == Membership.JOIN:

25
synapse/handlers/message.py
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@ -1872,6 +1872,7 @@ class EventCreationHandler:
events_and_context, backfilled=backfilled
)
events_and_pos = []
for event in persisted_events:
if self._ephemeral_events_enabled:
# If there's an expiry timestamp on the event, schedule its expiry.
@ -1880,25 +1881,23 @@ class EventCreationHandler:
stream_ordering = event.internal_metadata.stream_ordering
assert stream_ordering is not None
pos = PersistedEventPosition(self._instance_name, stream_ordering)
async def _notify() -> None:
try:
await self.notifier.on_new_room_event(
event, pos, max_stream_token, extra_users=extra_users
)
except Exception:
logger.exception(
"Error notifying about new room event %s",
event.event_id,
)
run_in_background(_notify)
events_and_pos.append((event, pos))
if event.type == EventTypes.Message:
# We don't want to block sending messages on any presence code. This
# matters as sometimes presence code can take a while.
run_in_background(self._bump_active_time, requester.user)
async def _notify() -> None:
try:
await self.notifier.on_new_room_events(
events_and_pos, max_stream_token, extra_users=extra_users
)
except Exception:
logger.exception("Error notifying about new room events")
run_in_background(_notify)
return persisted_events[-1]
async def _maybe_kick_guest_users(

65
synapse/notifier.py
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@ -294,35 +294,31 @@ class Notifier:
"""
self._new_join_in_room_callbacks.append(cb)
async def on_new_room_event(
async def on_new_room_events(
self,
event: EventBase,
event_pos: PersistedEventPosition,
events_and_pos: List[Tuple[EventBase, PersistedEventPosition]],
max_room_stream_token: RoomStreamToken,
extra_users: Optional[Collection[UserID]] = None,
) -> None:
"""Unwraps event and calls `on_new_room_event_args`."""
await self.on_new_room_event_args(
event_pos=event_pos,
room_id=event.room_id,
event_id=event.event_id,
event_type=event.type,
state_key=event.get("state_key"),
membership=event.content.get("membership"),
max_room_stream_token=max_room_stream_token,
extra_users=extra_users or [],
"""Creates a _PendingRoomEventEntry for each of the listed events and calls
notify_new_room_events with the results."""
event_entries = []
for event, pos in events_and_pos:
entry = self.create_pending_room_event_entry(
pos,
extra_users,
event.room_id,
event.type,
event.get("state_key"),
event.content.get("membership"),
)
event_entries.append((entry, event.event_id))
await self.notify_new_room_events(event_entries, max_room_stream_token)
async def on_new_room_event_args(
async def notify_new_room_events(
self,
room_id: str,
event_id: str,
event_type: str,
state_key: Optional[str],
membership: Optional[str],
event_pos: PersistedEventPosition,
event_entries: List[Tuple[_PendingRoomEventEntry, str]],
max_room_stream_token: RoomStreamToken,
extra_users: Optional[Collection[UserID]] = None,
) -> None:
"""Used by handlers to inform the notifier something has happened
in the room, room event wise.
@ -338,8 +334,25 @@ class Notifier:
until all previous events have been persisted before notifying
the client streams.
"""
self.pending_new_room_events.append(
_PendingRoomEventEntry(
for event_entry, event_id in event_entries:
self.pending_new_room_events.append(event_entry)
await self._third_party_rules.on_new_event(event_id)
self._notify_pending_new_room_events(max_room_stream_token)
self.notify_replication()
def create_pending_room_event_entry(
self,
event_pos: PersistedEventPosition,
extra_users: Optional[Collection[UserID]],
room_id: str,
event_type: str,
state_key: Optional[str],
membership: Optional[str],
) -> _PendingRoomEventEntry:
"""Creates and returns a _PendingRoomEventEntry"""
return _PendingRoomEventEntry(
event_pos=event_pos,
extra_users=extra_users or [],
room_id=room_id,
@ -347,12 +360,6 @@ class Notifier:
state_key=state_key,
membership=membership,
)
)
self._notify_pending_new_room_events(max_room_stream_token)
await self._third_party_rules.on_new_event(event_id)
self.notify_replication()
def _notify_pending_new_room_events(
self, max_room_stream_token: RoomStreamToken

19
synapse/replication/tcp/client.py
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@ -210,15 +210,16 @@ class ReplicationDataHandler:
max_token = self.store.get_room_max_token()
event_pos = PersistedEventPosition(instance_name, token)
await self.notifier.on_new_room_event_args(
event_pos=event_pos,
max_room_stream_token=max_token,
extra_users=extra_users,
room_id=row.data.room_id,
event_id=row.data.event_id,
event_type=row.data.type,
state_key=row.data.state_key,
membership=row.data.membership,
event_entry = self.notifier.create_pending_room_event_entry(
event_pos,
extra_users,
row.data.room_id,
row.data.type,
row.data.state_key,
row.data.membership,
)
await self.notifier.notify_new_room_events(
[(event_entry, row.data.event_id)], max_token
)
# If this event is a join, make a note of it so we have an accurate