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NodeJs - The server side JavaScript engine

In this article, I'm going to give an introduction to NodeJs.

 Node.js is a server-side platform built on V8 Engine. It was developed by Ryan Dahl in 2009.

 Node.js is an open source, a cross-platform runtime environment for developing server-side and networking applications. Node.js applications are written in JavaScript and can be run within the Node.js runtime on OS X, Microsoft Windows, and Linux.

Features of Node.js

Following are some of the important features that make Node.js the first priority of software architects.
  • Asynchronous and Event Driven − All APIs in the Node.js library are asynchronous, ie non-blocking. This essentially means that Node.js based servers never wait for the API to return data. The server moves to the next API after calling it, and the Events of Node.js notification mechanism helps the server get a response from the previous API call.
  • Very Fast − The Node.js library is built on Google Chrome's V8 JavaScript engine, so code execution is very fast.
  • Single Threaded but Highly Scalable − Node.js uses a single threaded model with an event loop. The event mechanism helps the server respond in a non-blocking manner, making the server highly scalable, as opposed to traditional servers that create restricted threads to handle requests. Node.js uses a single-threaded program, and the same program can serve a much larger number of requests than traditional servers like Apache HTTP Server.
  • No Buffering − Node.js applications never buffer any data.
  • License − Node.js is released under the MIT license.

  • Below is a link on the github wiki that contains an exhaustive list of projects, applications, and companies using Node.js. This list includes eBay, General Electric, GoDaddy, Microsoft, PayPal, Uber, Wikipins, Yahoo! , And Yammer are included.

  • Where to Use Node.js?

    The following are the areas where Node.js is proving itself as a perfect technology partner.
    • I/O bound Applications
    • Data Streaming Applications
    • Data Intensive Real-time Applications (DIRT)
    • JSON APIs based Applications
    • Single Page Applications

    Where Not to Use Node.js?

    It is not advisable to use Node.js for CPU intensive applications.


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