Book Image

Learn Scala Programming

By : Slava Schmidt
Book Image

Learn Scala Programming

By: Slava Schmidt

Overview of this book

The second version of Scala has undergone multiple changes to support features and library implementations. Scala 2.13, with its main focus on modularizing the standard library and simplifying collections, brings with it a host of updates. Learn Scala Programming addresses both technical and architectural changes to the redesigned standard library and collections, along with covering in-depth type systems and first-level support for functions. You will discover how to leverage implicits as a primary mechanism for building type classes and look at different ways to test Scala code. You will also learn about abstract building blocks used in functional programming, giving you sufficient understanding to pick and use any existing functional programming library out there. In the concluding chapters, you will explore reactive programming by covering the Akka framework and reactive streams. By the end of this book, you will have built microservices and learned to implement them with the Scala and Lagom framework.
Table of Contents (19 chapters)

Running the application

Please refer to Appendix A, Preparing the Environment and Running Code Samples, if you still have to install Java and/or SBT.

We will run our application in the terminal the same way we did in Chapter 11, An Introduction to the Akka and Actor Models and Chapter 12, Building Reactive Applications with Akka Typed, using two separate terminal sessions for Store and BakeryApp using the following commands:

  • sbt "runMain ch13.BakeryApp"
  • sbt "runMain ch13.Store"

We prefer this method because of its conciseness. If you're about to run the app in interactive mode, please consult Chapter 11, An Introduction to the Akka and Actor Models, for a detailed explanation of this approach.

In our examples, we expect the remote Store app to be available at the moment we start the main Bakery stream. Because of this, we have to start the Store first...