Mutiny on the JVM: Taming Complexity in the Heart of Reactive Java

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Reactive Programming has fascinated (and confounded) developers since Microsoft’s Cloud Programmability Team released the first version of Reactive Extensions for .NET. RxJava enables Netflix to deliver at massive scale, is a fixture in Android development, and is frequently used in combination with RxJS for web development. Reactive toolkits like Eclipse Vert.x and Lightbend’s Akka have powered distributed, high volume applications from the edge to the cloud. Spring’s Reactor project renamed many of the RxJava constructs, but did little to help ease of use or flatten the substantial learning curve. Java 8 embraced reactive programming with the introduction of Streams, Lambdas, CompletionStage, and CompletableFuture. Unfortunately Java 8 also delivered a substantial learning curve. Mutiny to the rescue! SmallRye Mutiny is a reactive library that distills Reactive Programming into 2 simple concepts: Multi and Uni.

Technology

Taming Complexity in the Heart of Reactive Java
Mutiny on the JVM
Jeremy Davis
jeremy.davis@redhat.com
@argntprgrmr

Mutiny Basics
Uni Multi
Models Asynchronous Operations
Emits 1 Item or a Failure
Models a Stream of Events
Emits n Items, a Failure, or a
Completion
Implements Reactive Streams

Operators Do Things
Operators
onItem()
createFrom()
transform()
collect()
select()
await()
call()
invoke()

“Great art is *********, buy tacos.” – Charles Bukowski
Taco-randomizer

“Beer is proof that God loves us and wants us to be happy” - Benjamin Franklin
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All Homework is Voluntary
Links
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Things to Watch and Do
Mutiny! SmallRye.io
Quarkus Guides - Getting Started with Reactive
Red Hat Developers' Quarkus Tutorial
Reactive Quarkus–A Java Mutiny | DevNation Tech Talk
Quarkus Insights #8: Mutiny - the reactive library
Quarkus Insights #11: Mutiny the reactive framework II

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