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https://issues.apache.org/jira/browse/KAFKA-4830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16016046#comment-16016046
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Matthias J. Sax commented on KAFKA-4830:
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Thanks for working on this [~james.c]. As mentioned above, this is a public API
change and thus we need a KIP:
https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals
We can discuss the proposed API there. If you need any help writing a KIP -- it
should not be too hard for this Jira -- just let us know.
> Augment KStream.print() to allow users pass in extra parameters in the
> printed string
> -------------------------------------------------------------------------------------
>
> Key: KAFKA-4830
> URL: https://issues.apache.org/jira/browse/KAFKA-4830
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Guozhang Wang
> Assignee: james chien
> Labels: needs-kip, newbie
>
> Today {{KStream.print}} use the hard-coded result string as:
> {code}
> "[" + this.streamName + "]: " + keyToPrint + " , " + valueToPrint
> {code}
> And some users are asking to augment this so that they can customize the
> output string as {{KStream.print(KeyValueMapper<K, V, String>)}} :
> {code}
> "[" + this.streamName + "]: " + mapper.apply(keyToPrint, valueToPrint)
> {code}
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