KIP-205 — Add all() and range() API to ReadOnlyWindowStore

Accepted Kafka 1.1 Streams

Adds all() and range(K from, K to, long fromTime, long toTime) APIs to ReadOnlyWindowStore in Kafka Streams, enabling full scans and key-range scans over windowed state stores. The existing ReadOnlyWindowStore only offered fetch-by-key methods, requiring callers to know keys in advance and making it impossible to iterate or scan the store without prior knowledge.

Details