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Matthias J. Sax reassigned KAFKA-3745: -------------------------------------- Assignee: (was: Bill Bejeck) > Consider adding join key to ValueJoiner interface > ------------------------------------------------- > > Key: KAFKA-3745 > URL: https://issues.apache.org/jira/browse/KAFKA-3745 > Project: Kafka > Issue Type: Improvement > Components: streams > Affects Versions: 0.10.0.0 > Reporter: Greg Fodor > Priority: Minor > Labels: api, kip > > In working with Kafka Stream joining, it's sometimes the case that a join key > is not actually present in the values of the joins themselves (if, for > example, a previous transform generated an ephemeral join key.) In such > cases, the actual key of the join is not available in the ValueJoiner > implementation to be used to construct the final joined value. This can be > worked around by explicitly threading the join key into the value if needed, > but it seems like extending the interface to pass the join key along as well > would be helpful. > KIP-149: > [https://cwiki.apache.org/confluence/display/KAFKA/KIP-149%3A+Enabling+key+access+in+ValueTransformer%2C+ValueMapper%2C+and+ValueJoiner] -- This message was sent by Atlassian Jira (v8.3.4#803005)