Minimum price
Suggested price


Building Reactive RESTful APIs with Scala and Akka

About the Book

If you are wondering why Scala or why Akka HTTP... Well, there is a rising need for concurrent and distributed applications, which is why frameworks like Akka and languages like Scala are gaining momentum right now, and they fulfill those needs with little extra effort.

In this book we will build a RESTful API for a simple bookstore and learn in the way:

  • How to set up database migrations using Flyway.
  • Build our own directives and using them in the routing DSL.
  • Authenticate users using JSON Web Tokens (JWT).
  • Test our services using ScalaTest.
  • Build a UI for searching books with Scalatags.
  • Connecting to a currency API to allow the user to switch currencies when the books are displayed.
  • All by using a Test-driven development (TDD) approach.

Sounds like a lot, right? Not really, we take an incremental approach, meaning that each chapter deals with different topics that we then build on in the next chapters to finally reach our goal, which is for you to be proficient in Akka HTTP.

See you inside. Cheers!

About the Author


Reading through a lot of theory and ending up with a hello world application is really annoying. We believe you should start with some foundations, but while getting your hands dirty, as this will help you understand the theory as you go.

You drive our priorities when deciding what content to release first, and what we should focus on. We will stick within a range of technologies, but the subtopics are for you to decide!

Join Codemunity and get started!

Table of Contents

  • Introduction
    • What Should I Know?
    • What Are We Going to Build?
    • What Are We Going to Use?
  • Project Setup
    • Creating Our Bookstore Project
    • Adding Our Project Dependencies
    • Setting Up Postgres for Development
  • Categories Endpoint
    • Project Configuration
    • Setting Up Flyway for Database Migrations
    • Database Access & Slick Setup
    • Adding Our First Route
    • Conclusion
  • Books Endpoint
    • Creating Our Book Migration & Model
    • Implementing Our Book Repository
    • Adding Book Searches to Our Endpoint
    • Improving and Understanding our Book Search
    • Working with Our Books Controller
    • Implementing the Web Server
    • Wrapping Up!
  • Users Endpoint
    • User Migration and Model
    • User Repository
    • Password Hashing
    • User Endpoint
    • Next Steps
  • User Authentication
    • Auth Repository
    • Token Service
    • Auth Controller
    • Auth Directives
    • Exposing the Missing Controllers
    • Conclusion
  • Book Search UI
    • Adding a Price Attribute
    • Hello, World!
    • Filter Form UI
    • Fetching and Applying Currency Rates
    • Error Handling & Improvements
    • Recap
  • Purchasing Books
    • Database Migration
    • Models
    • OrderRepository
    • OrderController
    • Tie Everything Together
    • Recap
  • Deploying Our Application
    • Coming Soon!
  • Conclusion
    • Additional Resources
    • See you around!

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

80% Royalties. Earn $16 on a $20 book.

We pay 80% royalties. That's not a typo: you earn $16 on a $20 sale. If we sell 5000 non-refunded copies of your book or course for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub