Levani Kokhreidze created KAFKA-8611:
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Summary: Make topic optional when using through() operations in DSL
Key: KAFKA-8611
URL: https://issues.apache.org/jira/browse/KAFKA-8611
Project: Kafka
Issue Type: New Feature
Components: streams
Reporter: Levani Kokhreidze
When using DSL in Kafka Streams, data re-partition happens only when
key-changing operation is followed by stateful operation. On the other hand, in
DSL, stateful computation can happen using _transform()_ operation as well.
Problem with this approach is that, even if any upstream operation was
key-changing before calling _transform()_, no auto-repartition is triggered. If
repartitioning is required, a call to _through(String)_ should be performed
before _transform()_. With the current implementation, burden of managing and
creating the topic falls on user and introduces extra complexity of managing
Kafka Streams application.
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