Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
14
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15
Index

Handling UNIX signals

UNIX signals offer a very handy way of interacting asynchronously with your applications. However, UNIX signal handling requires the use of Go channels that are used exclusively for this task. So, it would be good to talk a little about the concurrency model of Go, which requires the use of goroutines and channels for signal handling.

A goroutine is the smallest executable Go entity. In order to create a new goroutine you have to use the go keyword followed by a predefined function or an anonymous function—the methods are equivalent. A channel in Go is a mechanism that among other things allows goroutines to communicate and exchange data. If you are an amateur programmer or are hearing about goroutines and channels for the first time, do not panic. Goroutines and channels are explained in much more detail in Chapter 7, Go Concurrency.

In order for a goroutine or a function to terminate the entire Go application, it should call os.Exit()...