[jira] [Commented] (KAFKA-3794) Add Stream / Table prefix in print functions

["Bill Bejeck (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-3794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317475#comment-15317475 ] 

Bill Bejeck commented on KAFKA-3794:
------------------------------------

picking this one up, mea culpa

> Add Stream / Table prefix in print functions
> --------------------------------------------
>
>                 Key: KAFKA-3794
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3794
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: Bill Bejeck
>              Labels: newbie, user-experience
>
> Currently the KTable/KStream.print() operator will print the key-value pair as it was forwarded to this operator. However, if there are multiple operators in the topologies with the same {{PrintStream}} (e.g. stdout), their printed key-value pairs will be interleaving on that stream channel.
> Hence it is better to add a prefix for different KStream/KTable.print operators. One proposal:
> 1) For KTable, it inherits a table name when created, and we can use that name as the prefix as {{[table-name]: key, value}}.
> 2) For KStream, we can overload the function with an additional "name" parameter that we use as the prefix; if it is not specified, then we can use the parent processor node name, which has the pattern like {{KSTREAM-JOIN-suffix_index}}.



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