Elias Levy created KAFKA-4218:
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Summary: Enable access to key in {{ValueTransformer}}
Key: KAFKA-4218
URL: https://issues.apache.org/jira/browse/KAFKA-4218
Project: Kafka
Issue Type: Improvement
Components: streams
Affects Versions: 0.10.0.1
Reporter: Elias Levy
Assignee: Guozhang Wang
While transforming values via {{KStream.transformValues}} and
{{ValueTransformer}}, the key associated with the value may be needed, even if
it is not changed. For instance, it may be used to access stores.
As of now, the key is not available within these methods and interfaces,
leading to the use of {{KStream.transform}} and {{Transformer}}, and the
unnecessary creation of new {{KeyValue}} objects.
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