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Only get cached state from context in persist_event
We don't want to bother pulling out the current state from the DB since until we know we have to. Checking the context for state is just an optimisation.
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@ -163,6 +163,9 @@ class EventContext(object):
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context._prev_state_id = input["prev_state_id"]
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context._event_type = input["event_type"]
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context._event_state_key = input["event_state_key"]
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context._current_state_ids = None
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context._prev_state_ids = None
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context._fetching_state_deferred = None
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context.state_group = input["state_group"]
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@ -214,6 +217,16 @@ class EventContext(object):
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defer.returnValue(self._prev_state_ids)
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def get_cached_current_state_ids(self):
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"""Gets the current state IDs if we have them already cached.
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Returns:
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dict[(str, str), str]|None: Returns None if state_group
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is None, which happens when the associated event is an outlier.
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"""
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return self._current_state_ids
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@defer.inlineCallbacks
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def _fill_out_state(self, store):
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"""Called to populate the _current_state_ids and _prev_state_ids
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@ -549,7 +549,9 @@ class EventsStore(EventsWorkerStore):
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if ctx.state_group in state_groups_map:
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continue
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state_groups_map[ctx.state_group] = yield ctx.get_current_state_ids(self)
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current_state_ids = ctx.get_cached_current_state_ids()
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if current_state_ids is not None:
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state_groups_map[ctx.state_group] = current_state_ids
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# We need to map the event_ids to their state groups. First, let's
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# check if the event is one we're persisting, in which case we can
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