Richard Yu created KAFKA-9808:
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Summary: Refactor State Store Hierarchy
Key: KAFKA-9808
URL: https://issues.apache.org/jira/browse/KAFKA-9808
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Richard Yu
Over years of development, Kafka contributors has been adding more and more
state store classes on top of each other without too much regard to making it
more approachable for future modifications. For instance, it has become
increasingly difficult to add new API to state store classes while at the same
time, preventing them from being exposed to users.
In sum, the entire hierarchy is slowly spiraling out of control, and there is a
growing need to consolidate the multiple state store types into a few more
manageable ones for future Kafka developers.
Note: There has already been a couple of attempts to simplify the state store
hierarchy, but while the task isn't too complex, its just the enormous scope of
the change which makes things difficult.
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