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

Rejected Alternatives

Add a new Put

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method to the KeyValueStore interface

The idea would be to couple data and metadata together in a single Put call. 

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public interface KeyValueStore<K, V> extends StateStore, ReadOnlyKeyValueStore<K, V> {
	...


	void UpdatePositionupdatePosition(String topic, int partition, int offset);

	...
}

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