Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
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

Declaring hooks

In the previous section, we saw that a server-side application usually has two main lifecycles. So, being a hook-based web framework and following its philosophy of giving complete control to developers, Fastify emits a specific event every time it advances to the next phase. Furthermore, these phases follow a rigid and well-defined execution order. Knowing it enables us to add functionality at a specific point during the boot or the execution of our application.

One essential and beneficial side effect of this approach is that, as developers, we don’t care about the declaration order of our hooks since the framework guarantees that they will be invoked at the right moment in time.

The mechanism described works because Fastify, under the hood, defines a “hook runner” that runs the callback functions declared for every known event. As developers, we need a method to attach our hooks to the Fastify instance. The addHook hook allows us to do...