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Scala Programming Projects

You're reading from Scala Programming Projects Build real-world projects using popular Scala frameworks such as Play, Akka, and Spark

Product type Paperback

Published in Sep 2018

Publisher Packt

ISBN-13 9781788397643

Length 398 pages

Edition 1st Edition

Languages

Scala

Tools

Akka

Concepts

Programming Language

Authors (2):

Mikael Valot

Nicolas Jorand

View More author details

Table of Contents (13) Chapters

Preface

1. Writing Your First Program FREE CHAPTER

2. Developing a Retirement Calculator

3. Handling Errors

4. Advanced Features

5. Type Classes

6. Online Shopping - Persistence

7. Online Shopping - REST API

8. Online Shopping - User Interface

9. Interactive Browser

10. Fetching and Persisting Bitcoin Market Data

11. Batch and Streaming Analytics

12. Other Books You May Enjoy

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The REST API

The objective of the REST API is to interact with the shopping cart from the user interface in the browser. The main interactions are as follows:

Creating the cart
Adding, removing, and updating products in the cart

We will design our API by following REST architecture principles which was defined in 2000, by Roy Fielding.

Note

A formal description of the REST API can be found in Fielding Dissertation, CHAPTER 5, Representational State Transfer (REST), at http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm.

The main principles of the architecture are as follows:

It is based on client-server architecture, which means that a server can serve multiple clients.
It should be stateless—the server should not keep any context between client calls. The context should be kept by the client. All of the information required for the processing on the server should be part of the message sent.
As no context is kept on the server, it should be possible to cache responses at the server...

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Authors (2)

Valot

Valot

Mikaël Valot is Principal Software Engineer at IHS Markit in London, UK. He is the lead developer of a strategic market risk solution for banking regulation. He has over 15 years of experience in the financial industry of the UK, Switzerland, and France. He has a Diplôme d'Ingénieur in Computing (equivalent to an M.Sc.) from Telecom Nancy, France. After years of working with Java, he started developing professionally with Scala in 2010, and never looked back. He was a speaker at Scala Exchange 2015. When he is not coding in Scala, Mikaël likes to dabble with Haskell, the Robotic Operating System, and deep learning. He strongly believes that functional programming with strong typing is the best way to write safe and scalable programs.

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Nicolas Jorand

Nicolas Jorand

Nicolas Jorand is a senior developer. He worked for the finance industry for about 15 years before switching to the energy industry. He is a freelancer enjoying a partial time at Romande Energy, a Swiss utility company providing exclusively green electricity. Nicolas is a full-stack developer, playing with microcontrollers, developing standard web user and 3D interfaces on Unity, developing software to animate a humanoid robot (Nao) and finally, working with Scala on integration and backend software. All these projects are done with the same leitmotif; "In the dev process, get the issues as early as possible."

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