Check out the docs at Apache Kafka web site: http://kafka.apache.org/documentation/streams/
Find more links about Kafka Streams at Kafka Ecosystem page.
KIP-313: Add KStream.flatTransform and KStream.flatTransformValues
KIP-328: Ability to suppress updates for KTables (partially implemented in v2.1)
KIP-331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde
KIP-319: Replace segments with segmentInterval in WindowBytesStoreSupplier
KIP-321: Update TopologyDescription to better represent Source and Sink Nodes
KIP-328: Ability to suppress updates for KTables (partially implemented in v2.1)
KIP-358: Migrate Streams API to Duration instead of long ms times
KIP-365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde
Kafka 0.10.1:
Kafka 0.10.0:
KIP-364: Remove implicit Materialized, Consumed and Produced
KIP-378: Enable Dependency Injection for Kafka Streams handlers