Miro Cupak presented on exploring reactive programming in Java, demonstrating different levels of reactivity available in Java from threads and runnables to reactive streams and libraries to fully reactive microservices. The presentation covered 8 levels of reactive programming capabilities in Java from the earliest versions to the newest, including executors, fork/join pools, completable futures, reactive streams, HTTP/2 clients, and reactive libraries and frameworks. Cupak concluded by taking questions on Twitter.

1. @mirocupak
Exploring reactive
programming in Java
Miro Cupak
Co-founder & VP Engineering, DNAstack
March 14, 2019

2. @mirocupak
Live demo
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3. @mirocupak !3
8 levels of reactive
Level 0: Thread & Runnable (Java 1+)
Level 1: ExecutorService, Callable, Future (Java 5+)
Level 2: ForkJoinPool (Java 7+)
Level 3: CompletableFuture (Java 8+)
Level 4: Flow & reactive streams (Java 9+)
Level 5: HTTP/2 client (Java 11+)
Level 6: Reactive libraries (RxJava, Reactor…)
Level 7: Reactive (micro)services (Vert.x, Spring WebFlux, Kafka…)
JDK

4. @mirocupak
Questions?
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Session notes on Twitter.