Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Scala Programming Projects
  • Table Of Contents Toc
Scala Programming Projects

Scala Programming Projects

By : Valot, Nicolas Jorand
3.8 (5)
close
close
Scala Programming Projects

Scala Programming Projects

3.8 (5)
By: 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 (13 chapters)
close
close

Streaming transactions to Kafka


In this section, we are going to write a program that produces a stream of the BTC/USD transactions that happen in real time. Our program will:

  1. Subscribe to the WebSocket API of Bitstamp to get a stream of transactions in JSON format.

  2. For each transaction coming in the stream, it will:

    • Deserialize it

    • Convert it to the same Transaction case class that we used in BatchProducer in the previous chapter

    • Serialize it

    • Send it to a Kafka topic

In the next section, we will use Zeppelin again with Spark Streaming to query the data streamed to the Kafka topic.

Subscribing with Pusher

Go to Bitstamp's WebSocket API for live transactions: https://www.bitstamp.net/websocket/.

You will see that this API uses a tool called Pusher channels for real-time WebSocket streaming. The API documentation provides a Pusher Key that we need to use to receive live transactions.

Pusher channels is a hosted solution for delivering a stream of messages using a publish/subscribe pattern. You can find...

CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Scala Programming Projects
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon