Book Image

Effective Concurrency in Go

By : Burak Serdar
Book Image

Effective Concurrency in Go

By: Burak Serdar

Overview of this book

The Go language has been gaining momentum due to its treatment of concurrency as a core language feature, making concurrent programming more accessible than ever. However, concurrency is still an inherently difficult skill to master, since it requires the development of the right mindset to decompose problems into concurrent components correctly. This book will guide you in deepening your understanding of concurrency and show you how to make the most of its advantages. You’ll start by learning what guarantees are offered by the language when running concurrent programs. Through multiple examples, you will see how to use this information to develop concurrent algorithms that run without data races and complete successfully. You’ll also find out all you need to know about multiple common concurrency patterns, such as worker pools, asynchronous pipelines, fan-in/fan-out, scheduling periodic or future tasks, and error and panic handling in goroutines. The central theme of this book is to give you, the developer, an understanding of why concurrent programs behave the way they do, and how they can be used to build correct programs that work the same way in all platforms. By the time you finish the final chapter, you’ll be able to develop, analyze, and troubleshoot concurrent algorithms written in Go.
Table of Contents (13 chapters)

Backend services

If you are using Go, it is likely that you have written or will write a backend service of some sort. Service development comes with a unique set of challenges. First, the concurrency aspect of request handling is usually hidden under a service framework, which causes unintentional memory sharing and data races. Second, not all clients of the service have good intentions (attacks) or are free of bugs. In this section, we will look at some basic constructs using HTTP and web socket services. But before those, knowing a bit about TCP networking helps because many higher-level protocols like HTTP and web sockets are based on TCP. Next, we will construct a simple TCP server that handles requests concurrently and shuts down gracefully. For this, we need a listener, a request handler, and a wait group:

type TCPServer struct {
     Listener    net.Listener
     HandlerFunc func(context.Context,net.Conn...