Stateful actors on Apache Flink 2.x and Java 21 — durable per-key state, exactly-once messaging, Kafka and Kinesis I/O, Kubernetes-native deployment. Continues the Apache Stateful Functions programming model on the modern Flink line.
Maryk is a Kotlin Multiplatform library which helps you to store, query and send data in a structured way over multiple platforms. The data store stores any value with a version, so it is possible to request only the changed data or live listen for updates.