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https://issues.apache.org/jira/browse/KAFKA-4218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989837#comment-15989837
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Jeyhun Karimov commented on KAFKA-4218:
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[~mjsax], thanks for your comments. I absolutely agree on this. I think the
most relevant issues to group (with this issue) are (as shown in relevant links
as well) : KAFKA-4726 and KAFKA-3745 (although there is assignee, I haven't
seen PR on this issue and it is stale for some time). Do you agree on this or
are there other relevant issues that should be added to this group?
> Enable access to key in ValueTransformer
> ----------------------------------------
>
> Key: KAFKA-4218
> URL: https://issues.apache.org/jira/browse/KAFKA-4218
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Affects Versions: 0.10.0.1
> Reporter: Elias Levy
> Assignee: Jeyhun Karimov
> Labels: api, needs-kip, newbie
>
> While transforming values via {{KStream.transformValues}} and
> {{ValueTransformer}}, the key associated with the value may be needed, even
> if it is not changed. For instance, it may be used to access stores.
> As of now, the key is not available within these methods and interfaces,
> leading to the use of {{KStream.transform}} and {{Transformer}}, and the
> unnecessary creation of new {{KeyValue}} objects.
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