Book Image

Node.js Design Patterns - Second Edition

By : Luciano Mammino, Purra, Mario Casciaro
Book Image

Node.js Design Patterns - Second Edition

By: Luciano Mammino, Purra, Mario Casciaro

Overview of this book

Node.js is a massively popular software platform that lets you use JavaScript to easily create scalable server-side applications. It allows you to create efficient code, enabling a more sustainable way of writing software made of only one language across the full stack, along with extreme levels of reusability, pragmatism, simplicity, and collaboration. Node.js is revolutionizing the web and the way people and companies create their software. In this book, we will take you on a journey across various ideas and components, and the challenges you would commonly encounter while designing and developing software using the Node.js platform. You will also discover the "Node.js way" of dealing with design and coding decisions. The book kicks off by exploring the basics of Node.js describing it's asynchronous single-threaded architecture and the main design patterns. It then shows you how to master the asynchronous control flow patterns,and the stream component and it culminates into a detailed list of Node.js implementations of the most common design patterns as well as some specific design patterns that are exclusive to the Node.js world.Lastly, it dives into more advanced concepts such as Universal Javascript, and scalability' and it's meant to conclude the journey by giving the reader all the necessary concepts to be able to build an enterprise grade application using Node.js.
Table of Contents (12 chapters)

Decomposing complex applications

So far in the chapter, we have mainly focused our analysis on the x-axis of the scale cube. We saw how it represents the easiest and most immediate way to distribute the load of an application, also improving its availability. In the following section, we are now going to focus on the y-axis of the scale cube, where applications are scaled by decomposing them by functionality and service. As we will learn, this technique allows us to scale not only the capacity of an application, but also, and most importantly, its complexity.

Monolithic architecture

The term monolithic might make us think of a system without modularity, where all the services of an application are interconnected and almost indistinguishable. However, this is not always the case. Often, monolithic systems have a highly modular architecture and a good decoupling between their internal components.

A perfect example is the Linux OS kernel, which is part of a category called monolithic kernels...