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https://issues.apache.org/jira/browse/KAFKA-4830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Matthias J. Sax updated KAFKA-4830:
-----------------------------------
    Description: 
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}

  was:
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}


> 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
>              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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