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https://issues.apache.org/jira/browse/KAFKA-3133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15172692#comment-15172692
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Guozhang Wang commented on KAFKA-3133:
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Thanks for the patch [~kichristensen]. I have added you to the contributor list
so you can assign yourself to Kafka JIRAs in the future.
> Add putIfAbsent function to KeyValueStore
> -----------------------------------------
>
> Key: KAFKA-3133
> URL: https://issues.apache.org/jira/browse/KAFKA-3133
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Guozhang Wang
> Assignee: Kim Christensen
> Fix For: 0.10.0.0
>
>
> Since a local store will only be accessed by a single stream thread, there is
> no atomicity concerns and hence this API should be easy to add.
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