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https://issues.apache.org/jira/browse/SOLR-13758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931590#comment-16931590
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Andrzej Bialecki commented on SOLR-13758:
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[~AceHack] Did you mean the ability to register your own metrics
implementations? There are limitations in the Dropwizard API that make it
difficult - even though some of its APIs use the very unspecific marker
interface {{Metric}}, still in many places there are checks that only recognize
the predefined sub-interfaces.
This was one of the reasons we implemented the {{MetricsMap}}, which is a
generic map-like Gauge that exposes arbitrary key-value pairs.
{{QParserPlugin}} currently doesn't implement {{SolrMetricProducer}} but it
would be trivial to add this. The question is what kind of metrics you would
like to expose from these plugins?
> Ability to create custom metrics
> --------------------------------
>
> Key: SOLR-13758
> URL: https://issues.apache.org/jira/browse/SOLR-13758
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Affects Versions: 8.2
> Reporter: Rodney Aaron Stainback
> Priority: Major
>
> Solr currently uses Dropwizard internally to create metrics, please expose an
> interface into items like the QParserPlugin and all other extension points
> where they can plug in custom metrics.
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