Book Image

Learning Concurrency in Kotlin

By : Miguel Angel Castiblanco Torres
Book Image

Learning Concurrency in Kotlin

By: Miguel Angel Castiblanco Torres

Overview of this book

Kotlin is a modern and statically typed programming language with support for concurrency. Complete with detailed explanations of essential concepts, practical examples and self-assessment questions, Learning Concurrency in Kotlin addresses the unique challenges in design and implementation of concurrent code. This practical guide will help you to build distributed and scalable applications using Kotlin. Beginning with an introduction to Kotlin's coroutines, you’ll learn how to write concurrent code and understand the fundamental concepts needed to write multithreaded software in Kotlin. You'll explore how to communicate between and synchronize your threads and coroutines to write collaborative asynchronous applications. You'll also learn how to handle errors and exceptions, as well as how to work with a multicore processor to run several programs in parallel. In addition to this, you’ll delve into how coroutines work with each other. Finally, you’ll be able to build an Android application such as an RSS reader by putting your knowledge into practice. By the end of this book, you’ll have learned techniques and skills to write optimized code and multithread applications.
Table of Contents (11 chapters)

Atomicity violation

As mentioned in the first chapter, there is a type of concurrency error called atomicity violation. This type of error happens when the state of an object is modified concurrently without correct synchronization. The example that we saw in the first chapter was pretty simple: many coroutines modified the state of an object from different threads, and this resulted in some of those modifications being lost.

This type of error can happen with Kotlin too, but the language offers primitives that will help you to use the right design so that you avoid atomicity violation.

First, we need to truly understand what atomicity means and how violations can happen. Then we will be able to understand how to write our code to make it run atomically.

What atomicity means