Book Image

Hands-On Swift 5 Microservices Development

Book Image

Hands-On Swift 5 Microservices Development

Overview of this book

The capabilities of the Swift programming language are extended to server-side development using popular frameworks such as Vapor. This enables Swift programmers to implement the microservices approach to design scalable and easy-to-maintain architecture for iOS, macOS, iPadOS, and watchOS applications. This book is a complete guide to building microservices for iOS applications. You’ll start by examining Swift and Vapor as backend technologies and compare them to their alternatives. The book then covers the concept of microservices to help you get started with developing your first microservice. Throughout this book, you’ll work on a case study of writing an e-commerce backend as a microservice application. You’ll understand each microservice as it is broken down into details and written out as code throughout the book. You’ll also become familiar with various aspects of server-side development such as scalability, database options, and information flow for microservices that are unwrapped in the process. As you advance, you’ll get to grips with microservices testing and see how it is different from testing a monolith application. Along the way, you’ll explore tools such as Docker, Postman, and Amazon Web Services. By the end of the book, you’ll be able to build a ready-to-deploy application that can be used as a base for future applications.
Table of Contents (19 chapters)

Creating our controllers

This service operates behind the scenes with user-provided input. To logically separate the two areas, we will create two controllers:

  • OrderController: Manages everything related to real humans.
  • ProcessingController: Manages everything behind the scenes, no human touch needed

Let's start with OrderController.

Writing the OrderController

This controller interacts with the user and will reference out inputs and outputs.

  1. Start by creating an OrderController.swift file in Sources/App/Controllers, and enter the following code:
import Fluent
import Vapor

final class OrderController {

This is just an empty controller, so let's add a few functions.

  1. Add the functions from the preceding routes...