diff options
Diffstat (limited to 'synapse/handlers/sync.py')
| -rw-r--r-- | synapse/handlers/sync.py | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index 60b4d95cd7..f131c0e8e0 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -500,12 +500,27 @@ class SyncHandler: async def _load_filtered_recents( self, room_id: str, + sync_result_builder: "SyncResultBuilder", sync_config: SyncConfig, - now_token: StreamToken, + upto_token: StreamToken, since_token: Optional[StreamToken] = None, potential_recents: Optional[List[EventBase]] = None, newly_joined_room: bool = False, ) -> TimelineBatch: + """Create a timeline batch for the room + + Args: + room_id + sync_result_builder + sync_config + upto_token: The token up to which we should fetch (more) events. + If `potential_results` is non-empty then this is *start* of + the the list. + since_token + potential_recents: If non-empty, the events between the since token + and current token to send down to clients. + newly_joined_room + """ with Measure(self.clock, "load_filtered_recents"): timeline_limit = sync_config.filter_collection.timeline_limit() block_all_timeline = ( @@ -521,6 +536,20 @@ class SyncHandler: else: limited = False + # Check if there is a gap, if so we need to mark this as limited and + # recalculate which events to send down. + gap_token = await self.store.get_timeline_gaps( + room_id, + since_token.room_key if since_token else None, + sync_result_builder.now_token.room_key, + ) + if gap_token: + # There's a gap, so we need to ignore the passed in + # `potential_recents`, and reset `upto_token` to match. + potential_recents = None + upto_token = sync_result_builder.now_token + limited = True + log_kv({"limited": limited}) if potential_recents: @@ -559,10 +588,10 @@ class SyncHandler: recents = [] if not limited or block_all_timeline: - prev_batch_token = now_token + prev_batch_token = upto_token if recents: room_key = recents[0].internal_metadata.before - prev_batch_token = now_token.copy_and_replace( + prev_batch_token = upto_token.copy_and_replace( StreamKeyType.ROOM, room_key ) @@ -573,11 +602,15 @@ class SyncHandler: filtering_factor = 2 load_limit = max(timeline_limit * filtering_factor, 10) max_repeat = 5 # Only try a few times per room, otherwise - room_key = now_token.room_key + room_key = upto_token.room_key end_key = room_key since_key = None - if since_token and not newly_joined_room: + if since_token and gap_token: + # If there is a gap then we need to only include events after + # it. + since_key = gap_token + elif since_token and not newly_joined_room: since_key = since_token.room_key while limited and len(recents) < timeline_limit and max_repeat: @@ -647,7 +680,7 @@ class SyncHandler: recents = recents[-timeline_limit:] room_key = recents[0].internal_metadata.before - prev_batch_token = now_token.copy_and_replace(StreamKeyType.ROOM, room_key) + prev_batch_token = upto_token.copy_and_replace(StreamKeyType.ROOM, room_key) # Don't bother to bundle aggregations if the timeline is unlimited, # as clients will have all the necessary information. @@ -662,7 +695,9 @@ class SyncHandler: return TimelineBatch( events=recents, prev_batch=prev_batch_token, - limited=limited or newly_joined_room, + # Also mark as limited if this is a new room or there has been a gap + # (to force client to paginate the gap). + limited=limited or newly_joined_room or gap_token is not None, bundled_aggregations=bundled_aggregations, ) @@ -2397,8 +2432,9 @@ class SyncHandler: batch = await self._load_filtered_recents( room_id, + sync_result_builder, sync_config, - now_token=upto_token, + upto_token=upto_token, since_token=since_token, potential_recents=events, newly_joined_room=newly_joined, |