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)

An Introduction to the Akka and Actor Models

In this chapter, we'll learn about the actor model and how it is implemented in Akka. We'll make ourselves familiar with Akka by building a simple yet complete actor system. We will then learn how to create an actor system and actors, pass messages between them, make use of location transparency and remoting, properly structure the system for effective supervision, and look at how finite-state machine (FSM) actors work. Finally, we'll show you how to test actor-based applications.

The following topics will be covered in this chapter:

  • The actor model
  • The basics of Akka
  • Akka FSM
  • Akka remoting
  • Testing