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Change get_pos_of_last_change to return upper bound

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This commit is contained in:
Erik Johnston 2016-09-15 15:12:07 +01:00
parent cb3edec6af
commit 955f34d23e
2 changed files with 6 additions and 6 deletions
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3
synapse/storage/event_federation.py
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@ -347,8 +347,7 @@ class EventFederationStore(SQLBaseStore):
def get_forward_extremeties_for_room(self, room_id, stream_ordering): def get_forward_extremeties_for_room(self, room_id, stream_ordering):
# We want to make the cache more effective, so we clamp to the last # We want to make the cache more effective, so we clamp to the last
# change before the given ordering. # change before the given ordering.
last_change = self._events_stream_cache.get_pos_of_last_change(room_id) last_change = self._events_stream_cache.get_max_pos_of_last_change(room_id)
if last_change:
stream_ordering = min(last_change, stream_ordering) stream_ordering = min(last_change, stream_ordering)
return self._get_forward_extremeties_for_room(room_id, stream_ordering) return self._get_forward_extremeties_for_room(room_id, stream_ordering)

7
synapse/util/caches/stream_change_cache.py
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@ -122,7 +122,8 @@ class StreamChangeCache(object):
self._earliest_known_stream_pos = max(k, self._earliest_known_stream_pos) self._earliest_known_stream_pos = max(k, self._earliest_known_stream_pos)
self._entity_to_key.pop(r, None) self._entity_to_key.pop(r, None)
def get_pos_of_last_change(self, entity): def get_max_pos_of_last_change(self, entity):
"""Returns the stream pos of the last change for an entitiy, if known. """Returns an upper bound of the stream id of the last change to an
entity.
""" """
return self._entity_to_key.get(entity, None) return self._entity_to_key.get(entity, self._earliest_known_stream_pos)