[jira] [Created] (IGNITE-25505) Add OpenMBean CompositeData and TabularData support for JMX metric exporter

["Denis Chudov (Jira)" <ji...@apache.org>]

Denis Chudov created IGNITE-25505:
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             Summary: Add OpenMBean CompositeData and TabularData support for JMX metric exporter
                 Key: IGNITE-25505
                 URL: https://issues.apache.org/jira/browse/IGNITE-25505
             Project: Ignite
          Issue Type: Improvement
            Reporter: Denis Chudov


*Motivation*

As for now, composite metrics are exported as plain strings, which is not the best way for complex structured objects and it doesn't give a convenient way to watch them in external tools that use JMX. OpenMBean has a conventional way to solve this.

*Definition of done*

We should add OpenMBean CompositeData (and probably TabularData) support for jmx exporter:
 * as a prerequisite, CompositeMetric in metric framework should be extended in order to provide all composite metric information for jmx exporter to create CompositeData instance (items, their types, etc.);

 * all CompositeMetrics in AI should support these CompositeMetric extension;

 * after that, jmx exporter should be improved to create CompositeData for CompositeMetric.



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