Libin, Sun created EAGLE-75:
-------------------------------

             Summary: Leverage dropwizard metrics for generating Eagle Topology 
and DataSource Metrics
                 Key: EAGLE-75
                 URL: https://issues.apache.org/jira/browse/EAGLE-75
             Project: Eagle
          Issue Type: Sub-task
    Affects Versions: 0.3.0
            Reporter: Libin, Sun
            Assignee: Libin, Sun


As a monitoring system, eagle need to report & record both the datasource data 
distribution metric & topology running status metrics to let user have better 
understanding of the system running status.

Previously we added a simple metric framework to support user cases like 
[EAGLE-2](https://issues.apache.org/jira/browse/EAGLE-2) , 
[EAGLE-24](https://issues.apache.org/jira/browse/EAGLE-24)

Considering we will have a lot metric user cases to onboard later, we need a 
better metric framework to make it easier to support these cases, and after 
some investigation, we found [Dropwizard 
metrics](https://github.com/dropwizard/metrics) is a good one that can match 
our needs, So we want to integrate Dropwizard metrics with eagle 




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