Book Image

Scala Reactive Programming

By : Rambabu Posa
Book Image

Scala Reactive Programming

By: Rambabu Posa

Overview of this book

Reactive programming is a scalable, fast way to build applications, and one that helps us write code that is concise, clear, and readable. It can be used for many purposes such as GUIs, robotics, music, and others, and is central to many concurrent systems. This book will be your guide to getting started with Reactive programming in Scala. You will begin with the fundamental concepts of Reactive programming and gradually move on to working with asynchronous data streams. You will then start building an application using Akka Actors and extend it using the Play framework. You will also learn about reactive stream specifications, event sourcing techniques, and different methods to integrate Akka Streams into the Play Framework. This book will also take you one step forward by showing you the advantages of the Lagom framework while working with reactive microservices. You will also learn to scale applications using multi-node clusters and test, secure, and deploy your microservices to the cloud. By the end of the book, you will have gained the knowledge to build robust and distributed systems with Scala and Akka.
Table of Contents (16 chapters)

The Scala Future

In this section, we will discuss the Scala Future. Let's start by defining this component.

What is a Future in Scala?

In Scala, a Future is an object that represents a computation unit. It has some value at some point in the future. In other words, it is a programming construct in Scala used to write concurrency programs very easily. When a Future finishes its computation, we say that the Future is completed. However, it may be completed either successfully, or unsuccessfully.

If a Future is completed successfully, it has some computed value. If it has failed or completed unsuccessfully, it has some error.