The document discusses Reactive Streams, a new standard for asynchronous stream processing across JVM platforms and beyond. It introduces key concepts like Publishers, Subscribers, and the Subscription contract. Reactive Streams provides interoperability across implementations like RxJava, Reactor, Akka Streams, and Vert.x through a common set of interfaces and protocols. The current state is that Reactive Streams version 1.0.0 RC-5 was released in April with compatibility kits and interfaces for JVM and JavaScript.

1. REACTIVE STREAMS
CONDENSED
WHAT DO YOU NEED TO KNOW ABOUT NEW STANDARD
FROM JVM WORLD

2. The Java World
was Sad Once…

3. ... Here comes
Java 8…

4. …And new King

5. Not Enough

6. STREAMS ARE
Not LAZY

7. stream.forEach(x -> {
return x * 2;
})

8. DON’T HAVE API
TO REALTIME,
DISTRIBUTED
PROCESSING

9. Only Push or
Pull

10. stream.forEach(x -> {
return x * 2;
})

11. Iterator i = stream.iterator()
while (i.hasNext())
{
// do execution
}

12. NOT A SPECIFICATIONNot A
Specification

13. JVM is not just Java

14. Reactive Streams

15. Stream Over
Async
Boundaries

16. FAST Publisher
Slow Subscriber
Problem

17. Publisher
Subscriber
Demand
Data

19. RxJava
Reactor from SpringSource
Akka Streams
Vert.x
INTEROPERATIBILITY

20. void onSubscribe(Subscription s)
void onNext(T t)
void onComplete()
void onError(Throwable t)
SUBSCRIBER

21. void subscribe
(Subscriber<? super T> s)
PUBLISHER

22. SUBSCRIPTION
void cancel()
void request(long n)

23. extends
Subscriber<T>, Publisher<R>
PROCESSOR

24. Publisher Subscriber
subscribe
onSubscribe
request
Subscription
onNext

25. • All call on subscriber must be async
• All call on Subscription must not block
• Publisher just create subscription
CONTRACT

26. • 1.0.0 RC-5 published 10th April
• Technology Compatibility Kit Released
• JVM Interface
• JS Interface
• Network Protocols
CURRENT STATE

27. Thank You!