[openstack-dev] [vitrage] rules in vitrage_aggregated_state()

Yujun Zhang (ZTE) zhangyujun+zte at gmail.com
Tue Jan 9 06:33:40 UTC 2018

Hi root causers

I have been inspecting the code about aggregated state recently and have a
question regarding the rules.

The "not" operator in the if clause confuses me. If it is not a configured
data source, how do we apply the aggregation rules? It seems this is
handled in else clause.

        if datasource_name in self.datasources_state_confs or \
                datasource_name *not* in self.conf.datasources.types:

                new_vertex, self.UNDEFINED_DATASOURCE)
                new_vertex, self.UNDEFINED_DATASOURCE)

There are some test case describing the expected behavior. But I
couldn't understand the design philosophy behind it. What is expected

   1. the data source is not defined
   2. data source defined but state config not exist
   3. data source defined, state config exist but the state is not found.

Could somebody shed some light on it?

Yujun Zhang
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