Book Image

Scala Programming Projects

By : Mikael Valot, Nicolas Jorand
Book Image

Scala Programming Projects

By: Mikael Valot, Nicolas Jorand

Overview of this book

Scala Programming Projects is a comprehensive project-based introduction for those who are new to Scala. Complete with step-by-step instructions and easy-to-follow tutorials that demonstrate best practices when building applications, this Scala book will have you building real-world projects in no time. Starting with the fundamentals of software development, you’ll begin with simple projects, such as developing a financial independence calculator, and then advance to more complex projects, such as a building a shopping application and a Bitcoin transaction analyzer. You’ll explore a variety of Scala features, including its OOP and FP capabilities, and learn how to write concise, reactive, and concurrent applications in a type-safe manner. You’ll also understand how to use libraries such as Akka and Play. Furthermore, you’ll be able to integrate your Scala apps with Kafka, Spark, and Zeppelin, along with deploying applications on a cloud platform. By the end of the book, you’ll have a firm foundation in Java programming that’ll enable you to solve a variety of real-world problems, and you’ll have built impressive projects to add to your professional portfolio.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Chapter 6. Online Shopping - Persistence

In the next four chapters, we will write a project using the most common libraries and framework from the Scala ecosystem.

We are going to implement the cart management of an online shopping website, from the front-end to the database.

Starting from the database, we are going to implement a persistence layer. The responsibility of this layer is to persist in a relational database the content of the cart, for that purpose we are going to use a relational persistence framework named Slick.

Then, we are going to spend times to define an API to access the database, this API will use RESTfull web services architecture and JSON as message protocol. The API will be fully documented and testable from a generated website.

Finally, we are going to implement the user interface layer. With this interface, the user can add products into its cart, remove products and update the quantity of a particular product in the cart. Scala.js is used to implement this interface...