Book Image

Learning Concurrent Programming in Scala - Second Edition

By : Aleksandar Prokopec
Book Image

Learning Concurrent Programming in Scala - Second Edition

By: Aleksandar Prokopec

Overview of this book

Scala is a modern, multiparadigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way. Scala smoothly integrates the features of object-oriented and functional languages. In this second edition, you will find updated coverage of the Scala 2.12 platform. The Scala 2.12 series targets Java 8 and requires it for execution. The book starts by introducing you to the foundations of concurrent programming on the JVM, outlining the basics of the Java Memory Model, and then shows some of the classic building blocks of concurrency, such as the atomic variables, thread pools, and concurrent data structures, along with the caveats of traditional concurrency. The book then walks you through different high-level concurrency abstractions, each tailored toward a specific class of programming tasks, while touching on the latest advancements of async programming capabilities of Scala. It also covers some useful patterns and idioms to use with the techniques described. Finally, the book presents an overview of when to use which concurrency library and demonstrates how they all work together, and then presents new exciting approaches to building concurrent and distributed systems. Who this book is written for If you are a Scala programmer with no prior knowledge of concurrent programming, or seeking to broaden your existing knowledge about concurrency, this book is for you. Basic knowledge of the Scala programming language will be helpful.
Table of Contents (19 chapters)
Learning Concurrent Programming in Scala - Second Edition
About the Author
About the Reviewers
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Putting it all together - a remote file browser

In this section, we use our knowledge about different concurrency frameworks to build a remote file browser. This larger application example illustrates how different concurrency libraries work together, and how to apply them to different situations. We will name our remote file browser ScalaFTP.

The ScalaFTP browser is divided into two main components: the server and the client process. The server process will run on the machine whose filesystem we want to manipulate. The client will run on our own computer, and comprise of a graphical user interface used to navigate the remote filesystem. To keep things simple, the protocol that the client and the server will use to communicate will not really be FTP, but a custom communication protocol. By choosing the correct concurrency libraries to implement different parts of ScalaFTP, we will ensure that the complete ScalaFTP implementation fits inside just 500 lines of code.

Specifically, the ScalaFTP...