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)

Business problem

In this section, we will discuss our real business problem in detail. Understand this section well, as we will use our Reactive Ecosystem—Scala, Akka, Akka Streams, and Play Framework to solve this problem, step by step.

Problem discussion

We will develop a WeatherForecasting (WF) Reactive System using the Lightbend Reactive Ecosystem. This system contains three main subsystems:

  • WF Admin System: It acts as a Satellite Interface System. In real-time applications, satellites send weather forecasting data frequently to one of our systems, which is responsible for processing them in different stages and storing them in a data store in a required format, as illustrated:

As we cannot implement this kind...