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

Configuring Kotlin

You can use either Gradle or Maven to build your Kotlin project. You can create a new Kotlin project in Intellij IDEA without any build automation, but here is how to set up a Kotlin project for Gradle and Maven.

Configuring Kotlin for Gradle

To use the Kotlin language with Gradle, first add the following buildscript { } block to your build.gradle file:

buildscript {
     ext.kotlin_version = '<version to use>'

     repositories {

     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle- 

Then, you will need to apply the plugin, as shown in the following code, as well as the directories that will hold the source code.

Note that src/main/kotlin is already specified by default, but you would use the sourceSets { } block to specify a different directory if needed:

apply plugin: "kotlin"

 sourceSets {
     main.kotlin.srcDirs += 'src/main/kotlin'


You can learn more about the...