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https://issues.apache.org/jira/browse/KAFKA-3497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223533#comment-15223533
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Guozhang Wang commented on KAFKA-3497:
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Thanks [~kawamuray]. I think we can consider even replacing the "int
childIndex" parameter with childname. Migrating to Kafka Streams subtasks.
> Streams ProcessorContext should support forward() based on child name
> ---------------------------------------------------------------------
>
> Key: KAFKA-3497
> URL: https://issues.apache.org/jira/browse/KAFKA-3497
> Project: Kafka
> Issue Type: Improvement
> Components: kafka streams
> Affects Versions: 0.10.0.1
> Reporter: Yuto Kawamura
>
> Currently {{ProcessorContext}} only supports {{forward(K, V)}} which forwards
> KV to all children and {{forward(K, V, int childIndex)}} which forwards KV to
> specific children that is identified by an index of children List.
> While letting a Processor to issue messages which have arbitrary different
> downstream destination, it is not handy to keep ordering of calling
> {{addProcessor}}(or {{addSink}}) and childIndex consistent.
> Here I'd like to suggest introducing another signature {{forward(K, V, String
> childName)}} which allows to use child name(first argument to addProcessor or
> addSink) to indicate the destination downstream.
> Thread on user mailing list:
> http://mail-archives.apache.org/mod_mbox/kafka-users/201604.mbox/<caczvatp5kgeftap46_r7vtctymrgk4t1lc0wnlqymi0dhec...@mail.gmail.com>
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