Sunitha Beeram created HIVE-16206:
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Summary: Make Codahale metrics reporters pluggable
Key: HIVE-16206
URL: https://issues.apache.org/jira/browse/HIVE-16206
Project: Hive
Issue Type: Improvement
Components: Metastore
Reporter: Sunitha Beeram
Assignee: Sunitha Beeram
Hive metrics code currently allows pluggable metrics handlers - ie, handlers
that take care of providing interfaces for metrics collection as well as a
reporting; one of the 'handlers' is CodahaleMetrics. Codahale can work with
different reporters - currently supported ones are Console, JMX, JSON file and
hadoop2 sink. However, adding a new reporter involves changing that class. We
would like to make this conf driven just the way MetricsFactory handles
configurable Metrics classes.
Scope of work:
- Provide a new configuration option, HIVE_CODAHALE_REPORTER_CLASSES that
enumerates classes (like HIVE_METRICS_CLASS and unlike HIVE_METRICS_REPORTER).
- Move JsonFileReporter into its own class.
- Update CodahaleMetrics.java to read new config option and if the new option
is not present, look for the old option and instantiate accordingly) - ie, make
the code backward compatible.
- Update and add new tests.
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