Node.js is an extremely powerful JavaScript-based platform that’s built on Google Chrome's JavaScript V8 Engine, used to develop I/O intensive web applications like video streaming sites, single-page applications, online chat applications, and other web apps.
Node.js is used by large, established companies and newly-minted startups alike. Open-source and completely free, the platform is used by thousands of developers around the world. It brings plenty of advantages to the table, making it a better choice than other server-side platforms like Java or PHP in many cases.
This article will help you to get familiar with the architecture of Node.js. You’ll also get a basic understanding of how things work in a web application and how a server handles incoming user requests.
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A web application, as you may already know, is a program that runs on a server and is rendered by a client browser, using the internet to access all the resources of that application. It usually can be easily broken down into three parts:
Fig: Web application
The user interacts with the front-end part of a web application. The front-end is usually developed using languages like HTML and CSS styles, along with extensive usage of JavaScript-based frameworks like ReactJS and Angular, which help with application design.
The server is responsible for taking the client requests, performing the required tasks, and sending responses back to the clients. It acts as a middleware between the front-end and stored data to enable operations on the data by a client. Node.js, PHP, and Java are the most popular technologies in use to develop and maintain a web server.
The database stores the data for a web application. The data can be created, updated, and deleted whenever the client requests. MySQL and MongoDB are among the most popular databases used to store data for web applications.
Node.js uses the “Single Threaded Event Loop” architecture to handle multiple concurrent clients. Node.js Processing Model is based on the JavaScript event-based model along with the JavaScript callback mechanism.
Fig: Node.js architecture
Now let’s understand each part of the Node.js architecture and the workflow of a web server developed using Node.js.
A web server developed using Node.js typically has a workflow that is quite similar to the diagram illustrated below. Let’s explore this flow of operations in detail.
Fig: Node.js Architecture Workflow
-Querying for data
-Deleting data
-Updating the data
A single thread from the Thread Pool is assigned to a single complex request. This thread is responsible for completing a particular blocking request by accessing the external resources, such as compute, database, file system, etc.
Once, the task is carried out completely, the response is sent to the Event Loop that in turn sends that response back to the Client
Node.js Architecture comes with several advantages that give the server-side platform a distinct upper-hand when compared to other server-side languages:
All of these advantages contribute to making the servers developed using Node.js much faster and responsive when compared to those developed using other server development technologies.
Now that you have a basic understanding of how the Node.js architecture works to keep up with high client requests, you may be wondering how you can obtain the skills necessary to take advantage of its rising popularity.
Fortunately, there are some great options for learning this exciting and practical skill set at your own pace. Simplilearn’s Node.js Certification Training will give you a great foundation in this popular platform, combining live, instructor-led training, self-paced tutorials, and hands-on projects to help you become career-ready upon completion. Get started today and seize your future!
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Node.js Training | 8 May -5 Jun 2021, Weekend batch | Your City | View Details |
Taha is a Research Analyst at Simplilearn. He is passionate about building great user interfaces and keeps himself updated on the world of Artificial Intelligence. Taha is also interested in gaming and photography.
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