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Posted to jira@kafka.apache.org by "Mohammad Yousuf Minhaj Zia (Jira)" <ji...@apache.org> on 2022/02/03 05:41:00 UTC

[jira] [Created] (KAFKA-13641) Kafka Streams Scala: Add `Option` to `ValueJoiner` parameters

Mohammad Yousuf Minhaj Zia created KAFKA-13641:
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             Summary: Kafka Streams Scala: Add `Option` to `ValueJoiner` parameters
                 Key: KAFKA-13641
                 URL: https://issues.apache.org/jira/browse/KAFKA-13641
             Project: Kafka
          Issue Type: Improvement
          Components: streams
            Reporter: Mohammad Yousuf Minhaj Zia


Since `ValueJoiner` right parameter in `leftJoins`, `outerJoins` can be nullable, I am wondering if can wrap them around Scala `Option`.

However, there is also the concern that the left hand side value can be null in the case of tombstone messages, in which the `Option` semantics can be misleading. I still feel this could be a useful feature in reducing the number of `NullPointerExceptions`.



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