Eno Thereska created KAFKA-4730:
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             Summary: Streams does not have an in-memory windowed store
                 Key: KAFKA-4730
                 URL: https://issues.apache.org/jira/browse/KAFKA-4730
             Project: Kafka
          Issue Type: New Feature
          Components: streams
    Affects Versions: 0.10.2.0
            Reporter: Eno Thereska
             Fix For: 0.10.3.0


Streams has windowed persistent stores (e.g., see PersistentKeyValueFactory 
interface with "windowed" method), however it does not allow for windowed 
in-memory stores (e.g., see InMemoryKeyValueFactory interface). 

In addition to the interface not allowing it, streams does not actually have an 
implementation of an in-memory windowed store.

The implications are that operations that require windowing cannot use 
in-memory stores. 



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