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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