Book Image

Hands-On Dependency Injection in Go

By : Corey Scott
Book Image

Hands-On Dependency Injection in Go

By: Corey Scott

Overview of this book

Hands-On Dependency Injection in Go takes you on a journey, teaching you about refactoring existing code to adopt dependency injection (DI) using various methods available in Go. Of the six methods introduced in this book, some are conventional, such as constructor or method injection, and some unconventional, such as just-in-time or config injection. Each method is explained in detail, focusing on their strengths and weaknesses, and is followed with a step-by-step example of how to apply it. With plenty of examples, you will learn how to leverage DI to transform code into something simple and flexible. You will also discover how to generate and leverage the dependency graph to spot and eliminate issues. Throughout the book, you will learn to leverage DI in combination with test stubs and mocks to test otherwise tricky or impossible scenarios. Hands-On Dependency Injection in Go takes a pragmatic approach and focuses heavily on the code, user experience, and how to achieve long-term benefits through incremental changes. By the end of this book, you will have produced clean code that’s easy to test.
Table of Contents (15 chapters)

Technical requirements

As we are learning about the system that we are going to use for the rest of the book, I would strongly recommend downloading the source code and running it in your favorite IDE.

All of the code in this chapter is available at https://github.com/PacktPublishing/Hands-On-Dependency-Injection-in-Go/tree/master/ch04.

Instructions on how to obtain the code and configure the sample service are available in the README file, found at https://github.com/PacktPublishing/Hands-On-Dependency-Injection-in-Go/.

You can find the code for the service in the ch04/acme file.