Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
Book Image

Accelerating Server-Side Development with Fastify

By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Exploring the boot sequence

We learned in the previous section that a plugin is just an asynchronous function with well-defined parameters. We’ve also seen how Fastify plugins are the core entity we use to add features and functionalities to our applications. In this section, we will learn what the boot sequence is, how plugins interact with each other, and how Fastify ensures that all the developer’s constraints are met, before running the HTTP server.

Firstly, it is essential to say that the Fastify boot sequence is asynchronous too. Fastify loads every plugin added with the register method, one by one, respecting the order of the registration. Fastify starts this process only after .listen() or .ready() are called. After that, it waits for all promises to be settled (or for all completed callbacks to be called, if the callback style is used), and then it emits the ready event. If we have already got this far, we can be sure that our application is up and running...