Overview of Reactive architecture

1. Going Reactive
Rob Harrop

2. Who am I?
▸ CTO @ Skipjaq
▸ ML-driven performance optimisation
▸ Co-founder of SpringSource
▸ Once upon a time I…
▸ Contributed to Spring Framework
▸ Wrote a book about Spring
▸ Talked a lot about Spring

3. Who am I?
▸ I’m on Twitter:
▸ @robertharrop
▸ I’m on Github/Gitlab:
▸ github.com/robharrop
▸ gitlab.com/rdh
▸ I write about maths, modelling and performance
▸ https://robharrop.github.io
If you have questions after the session, {grab, tweet} me.

4. Agenda

5. Principles
& Practice

6. Why Reactive?

7. Architecture is Fractal

8. Reactive Systems

10. Reactive Subsystems

12. Reactive Objects

15. Principles

16. Reactive Manifesto
▸ Resilient
▸ Responsive
▸ Elastic
▸ Message-driven

17. Resilient

18. Back Pressure

19. Responsive

20. Asynchrony

21. Message-driven

22. Reactive Streams

23. public interface Publisher<T> {
public void subscribe(Subscriber<? super T> s);
}

24. public interface Subscriber<T> {
public void onSubscribe(Subscription s);
public void onNext(T t);
public void onError(Throwable t);
public void onComplete();
}

25. public interface Subscription {
public void request(long n);
public void cancel();
}

26. public interface Processor<T, R>
extends Subscriber<T>, Publisher<R> {
}

27. Project Reactor
▸ Mono<T>
▸ Flux<T>
▸ Let’s see a demo...

28. Practice