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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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Implementing the transaction batch producer

In this section, we will first discuss how to call a REST API to fetch BTC/USD transactions. Then we will see how to use Spark to deserialize the JSON payload into a well-typed distributed Dataset.

After that, we will introduce the parquet format and see how Spark makes it easy to save our transactions in this format.

With all of these building blocks, we will then implement our program in a purely functional way using the Test-Driven-Development (TDD) technique.

Calling the Bitstamp REST API

Bitstamp is a cryptocurrency exchange that people use to trade a cryptocurrency, such as bitcoin, for a conventional currency, such as US dollar or euro. One of the good things about Bitstamp is that it provides a REST API, which can be used to get information about the latest trades, and can also be used to send orders if you have an account.

You can find out more here: https://www.bitstamp.net/api/.

For this project, the only endpoint we are interested in is the...

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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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