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https://issues.apache.org/jira/browse/FLINK-3798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15251623#comment-15251623
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ASF GitHub Bot commented on FLINK-3798:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/1918
> Clean up RocksDB state backend access modifiers
> -----------------------------------------------
>
> Key: FLINK-3798
> URL: https://issues.apache.org/jira/browse/FLINK-3798
> Project: Flink
> Issue Type: Improvement
> Components: Streaming Connectors
> Reporter: Gyula Fora
> Assignee: Gyula Fora
> Priority: Minor
>
> The RocksDB state backend uses a lot package private methods and fields which
> makes it very hard to subclass the different parts for added functionality. I
> think these should be protected instead.
> Also the AbstractRocksDBState declares some methods final when there are
> use-cases when a subclass migh want to call them.
> Just to give you an example I am creating a version of the value state which
> would keep a small cache on heap. For this it would be enough to subclass the
> RockDBStateBackend and RocksDBVAlue state classes if the above mentioned
> changes were made. Now I have to use reflection to access package private
> fields and actually copy classes due to final methods.
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