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@ -644,6 +644,10 @@ class RoomMemberStore(SQLBaseStore):
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class _JoinedHostsCache(object):
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class _JoinedHostsCache(object):
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"""Cache for joined hosts in a room that is optimised to handle updates
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via state deltas.
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"""
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def __init__(self, store, room_id):
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def __init__(self, store, room_id):
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self.store = store
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self.store = store
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self.room_id = room_id
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self.room_id = room_id
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@ -658,6 +662,11 @@ class _JoinedHostsCache(object):
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@defer.inlineCallbacks
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@defer.inlineCallbacks
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def get_destinations(self, state_entry):
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def get_destinations(self, state_entry):
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"""Get set of destinations for a state entry
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Args:
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state_entry(synapse.state._StateCacheEntry)
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"""
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if state_entry.state_group == self.state_group:
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if state_entry.state_group == self.state_group:
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defer.returnValue(frozenset(self.hosts_to_joined_users))
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defer.returnValue(frozenset(self.hosts_to_joined_users))
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@ -99,6 +99,12 @@ class StateStore(SQLBaseStore):
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)
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)
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def get_state_group_delta(self, state_group):
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def get_state_group_delta(self, state_group):
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"""Given a state group try to return a previous group and a delta between
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the old and the new.
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Returns:
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(prev_group, delta_ids), where both may be None.
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"""
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def _get_state_group_delta_txn(txn):
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def _get_state_group_delta_txn(txn):
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prev_group = self._simple_select_one_onecol_txn(
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prev_group = self._simple_select_one_onecol_txn(
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txn,
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txn,
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