Frameworks for a better future

Nodejs

Nodejs is an open source cross platform java script run time environment. This has the ability of executing java script code outside of a browser. This is free to be run and has a lot of abilities in various platforms like Windows, Linux, Macos and so on. There is how PHP and ASP handles file request that sends task to computer’s file system. This waits until file system open and read the file. This has the ability of returning the content to the client.  Then it is ready to handle the next request. That is how Nodejs handles the file system. System is ready to handle the next request when the file system has open and read.

Nodejs runs single threaded programming which is memory efficient.

What can Nodejs do?

This basically generates dynamic page contents. This creates open, read, write and delete from server. This can add, delete and modify our data in the database. After we download and installed Nodejs, command line interface of the computers can operate further applications.

Famous companies who use Nodejs.

• DowJones
• Ebay
• Yahoo
• Pearsons

There are some popular frameworks in Nodejs

Express

• Web application framework

Socket.io

• helps to make real time apps.

Jade

• This is based on template.

Mongoose

• MongoDb too has the ability of object modeling.

Reason for using Nodejs

Javascript is known for by working with java. This is so famouse and run in google V8 engine. This has the ability of using the language from one end to other end. These are easily scaled both vertically and horizontally. Performance increases after cashing memory. This even supports unit testing.

Pros & Cons

The main benefit of using node is developers can use the same language from one end to the other end. At the same time performance are increased. This supports common tools like unit testing.

There are some disadvantages too.  Ecosystem of Node.js is still immature. Lack of having a process for managing errors too another con that developer come across when using Node.js.

Event loop

Nodejs is single threaded. But it supports in callbacks and promises. Node uses observer patterns. The secret of light weight and fast of node js is the events. As soon as node starts the server, it initiates the variables. Then simply waits for event for occur. In event driven architecture there is a general loop that listen for events. Functions who listen for events are observers. Whenever event get fired, function starts executing.