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Posted to dev@kafka.apache.org by "Matthias J. Sax (JIRA)" <ji...@apache.org> on 2018/05/29 18:31:00 UTC

[jira] [Created] (KAFKA-6966) Extend `TopologyDescription.Sink` to return `TopicNameExtractor`

Matthias J. Sax created KAFKA-6966:
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             Summary: Extend `TopologyDescription.Sink` to return `TopicNameExtractor`
                 Key: KAFKA-6966
                 URL: https://issues.apache.org/jira/browse/KAFKA-6966
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 2.0.0
            Reporter: Matthias J. Sax


With KIP-303, a dynamic routing feature was added and `TopologyDescription.Sink#topic()` returns `null` if this feature is used.

It would be useful to get the actually used `TopicNameExtractor` class from the `TopologyDescription`.

We suggest to add `Class<? extends TopicNameExtractor> TopologyDescription.Sink#topicNameExtractor()` and let it return `null` if dynamic routing feature is not used.

This is a public API change and requires a KIP: https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals



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