[jira] [Commented] (KAFKA-4144) Allow per stream/table timestamp extractor

["Guozhang Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-4144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15527237#comment-15527237 ] 

Guozhang Wang commented on KAFKA-4144:
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With the current TimestampExtractor, the input record is in the form of {{ConsumerRecord}} which contains the topic name, hence could users use different extracting logic based on the topic name in their instantiated {{TimestampExtractor}}?

> Allow per stream/table timestamp extractor
> ------------------------------------------
>
>                 Key: KAFKA-4144
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4144
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>    Affects Versions: 0.10.0.1
>            Reporter: Elias Levy
>            Assignee: Guozhang Wang
>
> At the moment the timestamp extractor is configured via a StreamConfig value to KafkaStreams.  That means you can only have a single timestamp extractor per app, even though you may be joining multiple streams/tables that require different timestamp extraction methods.
> You should be able to specify a timestamp extractor via KStreamBuilder.stream/table, just like you can specify key and value serdes that override the StreamConfig defaults.



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