diff options
Diffstat (limited to '')
| -rw-r--r-- | synapse/storage/events.py | 205 |
1 files changed, 118 insertions, 87 deletions
diff --git a/synapse/storage/events.py b/synapse/storage/events.py index 2fd9f4045b..599db4c9f0 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -284,71 +284,37 @@ class EventsStore(SQLBaseStore): new_forward_extremeties = {} current_state_for_room = {} if not backfilled: - # Work out the new "current state" for each room. - # We do this by working out what the new extremities are and then - # calculating the state from that. - events_by_room = {} - for event, context in chunk: - events_by_room.setdefault(event.room_id, []).append( - (event, context) - ) - - for room_id, ev_ctx_rm in events_by_room.items(): - # Work out new extremities by recursively adding and removing - # the new events. - latest_event_ids = yield self.get_latest_event_ids_in_room( - room_id - ) - new_latest_event_ids = yield self._calculate_new_extremeties( - room_id, [ev for ev, _ in ev_ctx_rm] - ) - - if new_latest_event_ids == set(latest_event_ids): - # No change in extremities, so no change in state - continue + with Measure(self._clock, "_calculate_state_and_extrem"): + # Work out the new "current state" for each room. + # We do this by working out what the new extremities are and then + # calculating the state from that. + events_by_room = {} + for event, context in chunk: + events_by_room.setdefault(event.room_id, []).append( + (event, context) + ) - new_forward_extremeties[room_id] = new_latest_event_ids - - # Now we need to work out the different state sets for - # each state extremities - state_sets = [] - missing_event_ids = [] - was_updated = False - for event_id in new_latest_event_ids: - # First search in the list of new events we're adding, - # and then use the current state from that - for ev, ctx in ev_ctx_rm: - if event_id == ev.event_id: - if ctx.current_state_ids is None: - raise Exception("Unknown current state") - state_sets.append(ctx.current_state_ids) - if ctx.delta_ids or hasattr(ev, "state_key"): - was_updated = True - break - else: - # If we couldn't find it, then we'll need to pull - # the state from the database - was_updated = True - missing_event_ids.append(event_id) - - if missing_event_ids: - # Now pull out the state for any missing events from DB - event_to_groups = yield self._get_state_group_for_events( - missing_event_ids, + for room_id, ev_ctx_rm in events_by_room.items(): + # Work out new extremities by recursively adding and removing + # the new events. + latest_event_ids = yield self.get_latest_event_ids_in_room( + room_id + ) + new_latest_event_ids = yield self._calculate_new_extremeties( + room_id, [ev for ev, _ in ev_ctx_rm] ) - groups = set(event_to_groups.values()) - group_to_state = yield self._get_state_for_groups(groups) + if new_latest_event_ids == set(latest_event_ids): + # No change in extremities, so no change in state + continue - state_sets.extend(group_to_state.values()) + new_forward_extremeties[room_id] = new_latest_event_ids - if not new_latest_event_ids or was_updated: - current_state_for_room[room_id] = yield resolve_events( - state_sets, - state_map_factory=lambda ev_ids: self.get_events( - ev_ids, get_prev_content=False, check_redacted=False, - ), + state = yield self._calculate_state_delta( + room_id, ev_ctx_rm, new_latest_event_ids ) + if state: + current_state_for_room[room_id] = state yield self.runInteraction( "persist_events", @@ -406,6 +372,91 @@ class EventsStore(SQLBaseStore): defer.returnValue(new_latest_event_ids) @defer.inlineCallbacks + def _calculate_state_delta(self, room_id, events_context, new_latest_event_ids): + """Calculate the new state deltas for a room. + + Assumes that we are only persisting events for one room at a time. + + Returns: + 2-tuple (to_delete, to_insert) where both are state dicts, i.e. + (type, state_key) -> event_id. `to_delete` are the entreis to + first be deleted from current_state_events, `to_insert` are entries + to insert. + May return None if there are no changes to be applied. + """ + # Now we need to work out the different state sets for + # each state extremities + state_sets = [] + missing_event_ids = [] + was_updated = False + for event_id in new_latest_event_ids: + # First search in the list of new events we're adding, + # and then use the current state from that + for ev, ctx in events_context: + if event_id == ev.event_id: + if ctx.current_state_ids is None: + raise Exception("Unknown current state") + state_sets.append(ctx.current_state_ids) + if ctx.delta_ids or hasattr(ev, "state_key"): + was_updated = True + break + else: + # If we couldn't find it, then we'll need to pull + # the state from the database + was_updated = True + missing_event_ids.append(event_id) + + if missing_event_ids: + # Now pull out the state for any missing events from DB + event_to_groups = yield self._get_state_group_for_events( + missing_event_ids, + ) + + groups = set(event_to_groups.values()) + group_to_state = yield self._get_state_for_groups(groups) + + state_sets.extend(group_to_state.values()) + + if not new_latest_event_ids: + current_state = {} + elif was_updated: + current_state = yield resolve_events( + state_sets, + state_map_factory=lambda ev_ids: self.get_events( + ev_ids, get_prev_content=False, check_redacted=False, + ), + ) + else: + return + + existing_state_rows = yield self._simple_select_list( + table="current_state_events", + keyvalues={"room_id": room_id}, + retcols=["event_id", "type", "state_key"], + desc="_calculate_state_delta", + ) + + existing_events = set(row["event_id"] for row in existing_state_rows) + new_events = set(ev_id for ev_id in current_state.itervalues()) + changed_events = existing_events ^ new_events + + if not changed_events: + return + + to_delete = { + (row["type"], row["state_key"]): row["event_id"] + for row in existing_state_rows + if row["event_id"] in changed_events + } + events_to_insert = (new_events - existing_events) + to_insert = { + key: ev_id for key, ev_id in current_state.iteritems() + if ev_id in events_to_insert + } + + defer.returnValue((to_delete, to_insert)) + + @defer.inlineCallbacks def get_event(self, event_id, check_redacted=True, get_prev_content=False, allow_rejected=False, allow_none=False): @@ -475,32 +526,13 @@ class EventsStore(SQLBaseStore): database before insertion. This is useful when retrying due to IntegrityError. """ max_stream_order = events_and_contexts[-1][0].internal_metadata.stream_ordering - for room_id, current_state in current_state_for_room.iteritems(): - existing_state_rows = self._simple_select_list_txn( - txn, - table="current_state_events", - keyvalues={"room_id": room_id}, - retcols=["event_id", "type", "state_key"], - ) - - # Figure out what has changed (if anything). Then we simply delete - # and readd the keys that have been changed. - # This saves us from deleting and reinserting thousands of rows for - # large rooms. - existing_events = set(row["event_id"] for row in existing_state_rows) - new_events = set(ev_id for ev_id in current_state.itervalues()) - changed_events = existing_events ^ new_events - if changed_events: + for room_id, current_state_tuple in current_state_for_room.iteritems(): + to_delete, to_insert = current_state_tuple txn.executemany( "DELETE FROM current_state_events WHERE event_id = ?", - [(ev_id,) for ev_id in changed_events], + [(ev_id,) for ev_id in to_delete.itervalues()], ) - events_to_insert = (new_events - existing_events) - to_insert = [ - (key, ev_id) for key, ev_id in current_state.iteritems() - if ev_id in events_to_insert - ] self._simple_insert_many_txn( txn, table="current_state_events", @@ -511,7 +543,7 @@ class EventsStore(SQLBaseStore): "type": key[0], "state_key": key[1], } - for key, ev_id in to_insert + for key, ev_id in to_insert.iteritems() ], ) @@ -523,13 +555,12 @@ class EventsStore(SQLBaseStore): # and which we have added, then we invlidate the caches for all # those users. members_changed = set( - row["state_key"] for row in existing_state_rows - if row["event_id"] in changed_events - and row["type"] == EventTypes.Member + state_key for ev_type, state_key in to_delete.iterkeys() + if ev_type == EventTypes.Member ) members_changed.update( - key[1] for key, event_id in to_insert - if key[0] == EventTypes.Member + state_key for ev_type, state_key in to_insert.iterkeys() + if ev_type == EventTypes.Member ) for member in members_changed: |