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• org.apache.kafka.stream.processor.StateStoreInterface StateStoreContext - adding method recordMetadata()

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Compatibility, Deprecation, and Migration Plan

The change of the StateStoreContext interface does not require any changes to any of the implementations of the interface, it merely exposes (recordMetadata) a method that is already implemented in AbstractProcessorContext. Therefore we do not expect any compatibility issues. Moreover, recordMetadata returns an object of type RecordMetadata which is exclusively read-only, thus, protecting Kafka-internal from being tampered by applications. 

Rejected Alternatives

None.