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https://issues.apache.org/jira/browse/SPARK-14151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15211634#comment-15211634
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Saisai Shao commented on SPARK-14151:
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I'm currently working on the second choice, to offer external developers
another choice of constructor without {{SecurityManager}}, that will be more
consistent with the current code.
> Propose to refactor and expose Metrics Sink and Source interface
> ----------------------------------------------------------------
>
> Key: SPARK-14151
> URL: https://issues.apache.org/jira/browse/SPARK-14151
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Saisai Shao
> Priority: Minor
>
> MetricsSystem is designed for plug-in different sources and sinks, user could
> write their own sources and sinks and configured through metrics.properties,
> MetricsSystem will register it through reflection. But current Source and
> Sink interface is private, which means user cannot create their own sources
> and sinks unless using the same package.
> So here propose to expose source and sink interface, this will let user build
> and maintain their own source and sink, alleviate the maintenance overhead of
> spark codebase.
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