To get the most out of this book

This book is for people who have worked with Swift before, on any platform. As long as you have a basic understanding of Swift, you should get along alright. I'm assuming you are operating on a macOS system that is running the newest version and that Xcode 11 or newer is installed. It will be beneficial if you have worked with servers before, even if not Swift servers. Also, if you have worked with any databases before and have a foundational understanding of how relational databases operate, that will be helpful.

Important: This book was written while Vapor 4 was in alpha stage and later in beta. All of the code has been updated to work with the latest available version, however, as Vapor progresses into release stage, there might be small changes that cause compile errors. You can check out the corresponding GitHub code to get the up-to-date compile code for each chapter.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Swift-5-Microservices-Development. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Create a new folder for the project and name it Shop Backend."

A block of code is set as follows:

import App
import Vapor

var env = try Environment.detect()
try LoggingSystem.bootstrap(from: &env)
let app = Application(env)
defer { app.shutdown() }
try configure(app)
try app.run()

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

import App
import Vapor

var env = try Environment.detect()
try LoggingSystem.bootstrap(from: &env)
let app = Application(env)
defer { app.shutdown() }
try configure(app)
try app.run()

Any command-line input or output is written as follows:

$ git --version

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Now add the following code to the Tests tab in your Auth request."

Warnings or important notes appear like this.

Tips and tricks appear like this.