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@ -279,6 +279,8 @@ class EventsStore(SQLBaseStore):
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# We can't easily parallelize these since different chunks
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# might contain the same event. :(
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# NB: Assumes that we are only persisting events for one room
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# at a time.
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new_forward_extremeties = {}
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current_state_for_room = {}
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if not backfilled:
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@ -361,14 +363,21 @@ class EventsStore(SQLBaseStore):
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@defer.inlineCallbacks
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def _calculate_new_extremeties(self, room_id, events):
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"""Caculates the new forward extremeties for a room given events to
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persist.
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Assumes that we are only persisting events for one room at a time.
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"""
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latest_event_ids = yield self.get_latest_event_ids_in_room(
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room_id
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)
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new_latest_event_ids = set(latest_event_ids)
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# First, add all the new events to the list
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new_latest_event_ids.update(
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event.event_id for event in events
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if not event.internal_metadata.is_outlier()
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)
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# Now remove all events that are referenced by the to-be-added events
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new_latest_event_ids.difference_update(
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e_id
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for event in events
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@ -376,6 +385,8 @@ class EventsStore(SQLBaseStore):
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if not event.internal_metadata.is_outlier()
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)
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# And finally remove any events that are referenced by previously added
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# events.
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rows = yield self._simple_select_many_batch(
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table="event_edges",
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column="prev_event_id",
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