Scala Reactive Programming

Developing RxScala HelloWorld with an Observable

As with our other chapters, we will start RxScala with a simple and standard HelloWorld example. In this section, we will develop a basic application and extend it further in the coming sections.

In this example, we will concentrate on only two components out of the three: Observable and Subscription.

Perform the following steps to develop and explore it:

1. Create a Scala SBT project in the IDE.
2. Name the project rxscala-helloworld-app.
3. Add the RxScala library to build a .sbt file, as shown in the following code snippet:

build.sbt:

      name := "rxscala-helloworld-app" 
      version := "0.1" 
      scalaVersion := "2.12.3" 
      libraryDependencies += "io.reactivex" %% "rxscala" % "0.26.5" 

4. Develop HelloWorldApp ...