[jira] [Comment Edited] (KAFKA-4830) Augment KStream.print() to allow users pass in extra parameters in the printed string

["james chien (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-4830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015110#comment-16015110 ] 

james chien edited comment on KAFKA-4830 at 5/18/17 2:40 AM:
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I think if we do that then we will introduce a new API called ```KStream#print(KeyValueMapper<K, V, String>)```.


was (Author: james.c):
I think if we do that then we will introduce a new API called `KStream#print(KeyValueMapper<K, V, String>)`.

> 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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