Patrick Heneise@PatrickHeneise

An Introduction {9. . 2012

What is node.js?

“Node.js is a server side software system designed for writing scalable Internet applications, notably web servers. Programs are written on the server side in JavaScript, using event-driven, asynchronous I/O to minimize overhead and maximize scalability.” - http://en.wikipedia.org/wiki/Nodejs

Server Side Software SystemYet Another Web Framework

event-driven, asynchronous I/O for V8

Traditional Multithreadingwith Apache

Concurrent Connections

0

10

20

30

40

0 500 1000 1500 2000 2500 3000 3500 4000

Mem

ory

in M

B

http://blog.webfaction.com/2008/12/a-little-holiday-present-10000-reqssec-with-nginx-2/

Apache Nginx

The Pizza Example

Event Loop

JavaScript

[...] if you work on the web, love it or hate it, you’re going to have to work with JavaScript at some point.

Installation

http://nodejs.orgHit INSTALL

brew install node

Hello World!

var http = require('http');http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n');}).listen(1337, '127.0.0.1');console.log('Server running at http://127.0.0.1:1337/');

Twitter Demo

What is node.js?

Basic theory

Installation

Hello World

Twitter World

npm - the node package manager

http://npm-count.jit.suNPM Count

Number of Modulesnpm vs. gem vs. pip

0

7500

15000

22500

30000

11/09/2012

NPM Ruby Gems pip

Node Deployment

jitsu deploy

http://nodejitsu.com

Helicopters! Flying robots & node.jshttp://nodecopter.com

Extremely fast operations

V8 Runtime

Rapidly growing ecosystem

Super easy deployment, free developer services

JavaScript

Summary

More...

http://nodemanual.org/0.8.14/nodejs_dev_guide/index.html

http://nodestack.org/videos

http://net.tutsplus.com/tutorials/javascript-ajax/this-time-youll-learn-node-js

http://www.youtube.com/user/lxjs2012

http://www.meetup.com/nodejs-bcn/

https://github.com/PatrickHeneise/nodejsbcn-bcnstartupmap

Q&A

Thanks