Hi All,
I've successfully integrated Stratos LB and WSO2 CEP (selected CEP engine).
Load balancer and CEP is communicating via Observer pattern, where a
statistics collector in LB acting as the subject and CEPs act as Observers.
Stats collector periodically notifies all the registered observers, so that
they can act upon changes. I'm committing the changes soon.
Now, when I load Stratos LB, CEP emits periodical aggregated statistics on
requests in flight at LB level, to a topic.
Following are few aggregated stats emitted by CEP:
{"average_requests_in_flight":{"cluster_id":"c1","value":"78.66666666666667"}}
{"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"0.17776829680194836"}}
{"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.0666637038353851"}}
{"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"-0.004444888953094816"}}
{"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.04444246922359006"}}
{"average_requests_in_flight":{"cluster_id":"c1","value":"9.5"}}
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Best Regards,
Nirmal
Nirmal Fernando.
PPMC Member & Committer of Apache Stratos,
Senior Software Engineer, WSO2 Inc.
Blog: http://nirmalfdo.blogspot.com/
