Book Image

Learning RxJava

By : Thomas Nield
Book Image

Learning RxJava

By: Thomas Nield

Overview of this book

RxJava is a library for composing asynchronous and event-based programs using Observable sequences for the JVM, allowing developers to build robust applications in less time. Learning RxJava addresses all the fundamentals of reactive programming to help readers write reactive code, as well as teach them an effective approach to designing and implementing reactive libraries and applications. Starting with a brief introduction to reactive programming concepts, there is an overview of Observables and Observers, the core components of RxJava, and how to combine different streams of data and events together. You will also learn simpler ways to achieve concurrency and remain highly performant, with no need for synchronization. Later on, we will leverage backpressure and other strategies to cope with rapidly-producing sources to prevent bottlenecks in your application. After covering custom operators, testing, and debugging, the book dives into hands-on examples using RxJava on Android as well as Kotlin.
Table of Contents (21 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback


In this chapter, we covered how to use RxJava for Kotlin. The Kotlin language is an exciting opportunity to express code on the JVM more pragmatically, and RxJava can leverage many of its useful features. Extension functions, data classes, RxKotlin, and functional operators such as let()/apply() allow you to express your reactive domain more easily. Although SAM inference can cause you to hit snags, you can leverage RxKotlin's helper utilities to get around this issue until JetBrains creates a fix. Down the road, it will be interesting to see if a ReactiveX implementation in pure Kotlin appears. Such an implementation would bring in a lot of functionality that Kotlin allows and Java does not.

This is the end! If you have covered this book cover-to-cover, congrats! You should have a strong foundation to leverage RxJava in your workplace and projects. Reactive programming is a radically different approach to problem solving, but it is radically effective too. Reactive programming will...