diff options
Diffstat (limited to 'synapse/handlers/sync.py')
| -rw-r--r-- | synapse/handlers/sync.py | 95 |
1 files changed, 78 insertions, 17 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index d0c99c35e3..05bf6d46dd 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- -# Copyright 2015 - 2016 OpenMarket Ltd +# Copyright 2015, 2016 OpenMarket Ltd +# Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -416,7 +417,7 @@ class SyncHandler(object): )) @defer.inlineCallbacks - def get_state_after_event(self, event): + def get_state_after_event(self, event, types=None): """ Get the room state after the given event @@ -426,14 +427,14 @@ class SyncHandler(object): Returns: A Deferred map from ((type, state_key)->Event) """ - state_ids = yield self.store.get_state_ids_for_event(event.event_id) + state_ids = yield self.store.get_state_ids_for_event(event.event_id, types) if event.is_state(): state_ids = state_ids.copy() state_ids[(event.type, event.state_key)] = event.event_id defer.returnValue(state_ids) @defer.inlineCallbacks - def get_state_at(self, room_id, stream_position): + def get_state_at(self, room_id, stream_position, types=None): """ Get the room state at a particular stream position Args: @@ -449,7 +450,7 @@ class SyncHandler(object): if last_events: last_event = last_events[-1] - state = yield self.get_state_after_event(last_event) + state = yield self.get_state_after_event(last_event, types) else: # no events in this room - so presumably no state @@ -471,6 +472,8 @@ class SyncHandler(object): be None. now_token(str): Token of the end of the current batch. full_state(bool): Whether to force returning the full state. + lazy_load_members(bool): Whether to only return state for members + referenced in this timeline segment Returns: A deferred new event dictionary @@ -481,22 +484,57 @@ class SyncHandler(object): # TODO(mjark) Check for new redactions in the state events. with Measure(self.clock, "compute_state_delta"): + + types = None + member_state_ids = {} + lazy_load_members = sync_config.filter_collection.lazy_load_members() + + if lazy_load_members: + # We only request state for the members needed to display the + # timeline: + + types = [ + (EventTypes.Member, state_key) + for state_key in set( + event.sender # FIXME: we also care about targets etc. + for event in batch.events + ) + ] + + # We can't remove redundant member types at this stage as it has + # to be done based on event_id, and we don't have the member + # event ids until we've pulled them out of the DB. + + if not types: + # an optimisation to stop needlessly trying to calculate + # member_state_ids + lazy_load_members = False + + types.append((None, None)) # don't just filter to room members + if full_state: if batch: current_state_ids = yield self.store.get_state_ids_for_event( - batch.events[-1].event_id + batch.events[-1].event_id, types=types ) state_ids = yield self.store.get_state_ids_for_event( - batch.events[0].event_id + batch.events[0].event_id, types=types ) + else: current_state_ids = yield self.get_state_at( - room_id, stream_position=now_token + room_id, stream_position=now_token, types=types ) state_ids = current_state_ids + if lazy_load_members: + member_state_ids = { + t: state_ids[t] + for t in state_ids if t[0] == EventTypes.Member + } + timeline_state = { (event.type, event.state_key): event.event_id for event in batch.events if event.is_state() @@ -505,22 +543,29 @@ class SyncHandler(object): state_ids = _calculate_state( timeline_contains=timeline_state, timeline_start=state_ids, + timeline_start_members=member_state_ids, previous={}, current=current_state_ids, ) elif batch.limited: state_at_previous_sync = yield self.get_state_at( - room_id, stream_position=since_token + room_id, stream_position=since_token, types=types ) current_state_ids = yield self.store.get_state_ids_for_event( - batch.events[-1].event_id + batch.events[-1].event_id, types=types ) state_at_timeline_start = yield self.store.get_state_ids_for_event( - batch.events[0].event_id + batch.events[0].event_id, types=types ) + if lazy_load_members: + member_state_ids = { + t: state_at_timeline_start[t] + for t in state_at_timeline_start if t[0] == EventTypes.Member + } + timeline_state = { (event.type, event.state_key): event.event_id for event in batch.events if event.is_state() @@ -529,11 +574,23 @@ class SyncHandler(object): state_ids = _calculate_state( timeline_contains=timeline_state, timeline_start=state_at_timeline_start, + timeline_start_members=member_state_ids, previous=state_at_previous_sync, current=current_state_ids, ) else: state_ids = {} + if lazy_load_members: + # TODO: filter out redundant members based on their mxids (not their + # event_ids) at this point. We know we can do it based on mxid as this + # is an non-gappy incremental sync. + + # strip off the (None, None) and filter to just room members + types = types[:-1] + if types: + state_ids = yield self.store.get_state_ids_for_event( + batch.events[0].event_id, types=types + ) state = {} if state_ids: @@ -1341,8 +1398,7 @@ class SyncHandler(object): return state = yield self.compute_state_delta( - room_id, batch, sync_config, since_token, now_token, - full_state=full_state + room_id, batch, sync_config, since_token, now_token, full_state=full_state ) if room_builder.rtype == "joined": @@ -1438,12 +1494,16 @@ def _action_has_highlight(actions): return False -def _calculate_state(timeline_contains, timeline_start, previous, current): +def _calculate_state(timeline_contains, timeline_start, timeline_start_members, + previous, current): """Works out what state to include in a sync response. Args: timeline_contains (dict): state in the timeline timeline_start (dict): state at the start of the timeline + timeline_start_members (dict): state at the start of the timeline + for room members who participate in this chunk of timeline. + Should always be a subset of timeline_start. previous (dict): state at the end of the previous sync (or empty dict if this is an initial sync) current (dict): state at the end of the timeline @@ -1462,11 +1522,12 @@ def _calculate_state(timeline_contains, timeline_start, previous, current): } c_ids = set(e for e in current.values()) - tc_ids = set(e for e in timeline_contains.values()) - p_ids = set(e for e in previous.values()) ts_ids = set(e for e in timeline_start.values()) + tsm_ids = set(e for e in timeline_start_members.values()) + p_ids = set(e for e in previous.values()) + tc_ids = set(e for e in timeline_contains.values()) - state_ids = ((c_ids | ts_ids) - p_ids) - tc_ids + state_ids = (((c_ids | ts_ids) - p_ids) - tc_ids) | tsm_ids return { event_id_to_key[e]: e for e in state_ids |