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https://issues.apache.org/jira/browse/SPARK-16407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15491752#comment-15491752
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Reynold Xin commented on SPARK-16407:
-------------------------------------

This doesn't work in SQL, Python, etc.

I like the general idea of providing a way to make the complex things possible, 
but we shouldn't make this the default way and allow developers to use this as 
an excuse to build APIs that are not compatible across languages.

> Allow users to supply custom StreamSinkProviders
> ------------------------------------------------
>
>                 Key: SPARK-16407
>                 URL: https://issues.apache.org/jira/browse/SPARK-16407
>             Project: Spark
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: holdenk
>
> The current DataStreamWriter allows users to specify a class name as format, 
> however it could be easier for people to directly pass in a specific provider 
> instance - e.g. for user equivalent of ForeachSink or other sink with 
> non-string parameters.



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