Node.js

Set of libraries on top of V8

Evented I/O

e.g. ioOperation(args, callbackFunction);

Evented

setTimeout(function(){console.log(“world”);},2000);console.log(“hello”);

Sequential

print(“hello”);sleep(2);print (“world”);

No threads :)

More scalable

Code in js

Benefits

WebSocket

Full duplex single socket connection

Polling

Client Server

Something new ?

NO !!!

Something new ?

NO !!!

Something new ?

Yeah! Here it is !

Long-Polling = polling with time factor

Benefits

Bi-directional communication

Full duplex

Less overhead as compared to HTTP/AJAX

Sanwaad

The real-time chat server

Design

Server:

app.js – routersanwaad.js – controllerindex.jade – view

Design...

Client:

landing HTML pagelib.css – cascaded stylesheetlib.js – client side java scriptjquery.js – a js library to write less and do more

Design...

Testing:

qunit.js – javascript test suiteutest.js – unit teststestRunner.html – Test Runner

Demo

Questions ?