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Fetch events in a separate transaction.
This has a couple of benefits: - It reduces the time of transactions, allowing other database requests to run. - Fetching events is given a dedicated database thread, and so can't starve other database requests.
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@ -220,27 +220,29 @@ class StreamStore(SQLBaseStore):
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rows = self.cursor_to_dict(txn)
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ret = self._get_events_txn(
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txn,
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[r["event_id"] for r in rows],
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get_prev_content=True
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)
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return rows
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self._set_before_and_after(ret, rows, topo_order=False)
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rows = yield self.runInteraction("get_room_events_stream_for_room", f)
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ret.reverse()
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ret = yield self._get_events(
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[r["event_id"] for r in rows],
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get_prev_content=True
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)
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if rows:
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key = "s%d" % min(r["stream_ordering"] for r in rows)
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else:
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# Assume we didn't get anything because there was nothing to
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# get.
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key = from_key
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self._set_before_and_after(ret, rows, topo_order=False)
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return ret, key
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res = yield self.runInteraction("get_room_events_stream_for_room", f)
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defer.returnValue(res)
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ret.reverse()
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if rows:
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key = "s%d" % min(r["stream_ordering"] for r in rows)
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else:
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# Assume we didn't get anything because there was nothing to
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# get.
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key = from_key
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defer.returnValue((ret, key))
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@defer.inlineCallbacks
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def get_room_changes_for_user(self, user_id, from_key, to_key):
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if from_key is not None:
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from_id = RoomStreamToken.parse_stream_token(from_key).stream
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@ -249,14 +251,14 @@ class StreamStore(SQLBaseStore):
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to_id = RoomStreamToken.parse_stream_token(to_key).stream
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if from_key == to_key:
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return defer.succeed([])
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defer.returnValue([])
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if from_id:
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has_changed = self._membership_stream_cache.has_entity_changed(
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user_id, int(from_id)
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)
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if not has_changed:
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return defer.succeed([])
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defer.returnValue([])
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def f(txn):
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if from_id is not None:
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@ -281,17 +283,18 @@ class StreamStore(SQLBaseStore):
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txn.execute(sql, (user_id, to_id,))
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rows = self.cursor_to_dict(txn)
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ret = self._get_events_txn(
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txn,
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[r["event_id"] for r in rows],
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get_prev_content=True
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)
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return rows
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self._set_before_and_after(ret, rows, topo_order=False)
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rows = yield self.runInteraction("get_room_changes_for_user", f)
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return ret
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ret = yield self._get_events(
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[r["event_id"] for r in rows],
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get_prev_content=True
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)
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return self.runInteraction("get_room_changes_for_user", f)
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self._set_before_and_after(ret, rows, topo_order=False)
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defer.returnValue(ret)
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def get_room_events_stream(
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self,
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