The document introduces node.js and server-side JavaScript. It discusses the author's journey in web development, including static HTML, Perl/CGI, and PHP. It outlines some issues with PHP and needs for the next technology, which led the author to node.js due to its ease of use, scalability, engineering capabilities, and being a new technology with a great community. Node.js allows for real-time applications using a non-blocking and single-threaded model with JavaScript on both the front-end and back-end.

1. node.js
introduction of server side javascript
Saturday, November 23, 13

2. Sira Sujjinanont
@hunt
Managing Director
Webiz Co.,Ltd.
CTO Jitta.com
15 years in
Web development
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3. Web Development Journey
•
Static HTML
•
PERL/CGI (2 years)
•
PHP (11 years)
•
•
•
CMS > Drupal, Wordpress, Joomla
Framework > Yii, Zend, CodeIgniter, …
What’s next?!?
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4. PHP bad parts
•
Consume a lot of memories
•
Cannot do Realtime Application
•
Cannot deal direct with protocol layer
•
No parallel processing
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5. What I need in the next?
•
Easy to learn (for me and for my team)
•
Fast / Scalability
•
Allow us to dig deep in engineering
•
New technology! New boundary!
•
Open source with great community
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6. And node.js came up!
(server-side javascript)
but we need to dig it deep!!
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7. Why Javascript?
•
Easy to learn and understanding!
•
Front-end coder can do backend immediately!
•
Javascript Engine war!
(huge changed on web industry)
•
Non-blocking I/O
•
One language on both front and back!!!
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8. Server-side javascript
•
Netscape LiveWrite 1996
•
Rhino 1997
•
and over 50 platforms!
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9. Many problems!
•
Slow engines
•
Lag of interest in Javascript language
(until 2005… ajax trend!)
•
Great competitors platform and language
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10. •
Created by Ryan Dahl in 2009
easily building fast, scalable network applications
•
Google V8 Javascript Engine
(Same technology in Google Chrome)
•
NPM Package Manager
(Come by default great as it should be: 48,362 modules)
•
Realtime, Command line, Many tools
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11. When do we need a web?
•
Download web server and install
•
Install PHP and maybe database
•
Configuration….
•
And now we can put our code on it!
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12. See Node.js way!
(create a web server, just in 6 lines of code)
1
Download and click install
apt-get install nodejs
2
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200);
res.end("Hello World!n");
}).listen(3000);
console.log('Server running at http://localhost:3000/');
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13. It just works!
Web server and ready for
a huge traffic :)
even 10,000/reqs
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200);
res.end("Hello World!n");
}).listen(3000);
console.log('Server running at http://localhost:3000/');
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14. Blocking I/O
var a = db.query(“SELECT * FROM users”);
console.log(‘Result a:’, a);
var b = db.query(“SELECT * FROM documents”);
console.log(‘Result B:’, b);
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15. Blocking I/O
var a = db.query(“SELECT * FROM users”);
console.log(‘Result a:’, a);
wait
var b = db.query(“SELECT * FROM documents”);
console.log(‘Result B:’, b);
Waste cpu cycles from waiting…
other part of code, they need to wait too!
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wait

16. Blocking I/O
var a = db.query(“SELECT * FROM users”);
console.log(‘Result a:’, a);
wait
var b = db.query(“SELECT * FROM documents”);
console.log(‘Result B:’, b);
sum ( a + b)
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wait

17. Non Blocking I/O
var a = db.query(“SELECT * FROM users”,
function(result){
console.log(‘Result a:’, a);
}
);
var b = db.query(“SELECT * FROM documents”,
function(result){
console.log(‘Result b:’, ab);
}
);
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18. Non Blocking I/O
var a = db.query(“SELECT * FROM users”,
function(result){
console.log(‘Result a:’, a);
}
);
run parallel
var b = db.query(“SELECT * FROM documents”,
function(result){
console.log(‘Result b:’, ab);
}
);
max ( a, b )
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run parallel

19. Benchmark
nginx (non blocking i/o)
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apache (blocking i/o)

20. Suitable Applications
•
Single page app
•
Full web app
•
Realtime app
chat, notification, games
•
Crawler, Bot
•
Streaming
•
File uploading
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21. Who using now?
and thousand thousand more…
including me... Molome ....
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22. You should try!
•
It’s not hard to start if you familiar with Javascript
•
If you looking for another language
•
It’ll change the way you do a web
•
And it’s FUN!!
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23. Start now!
http://github.com/hunt/seventies
template for node.js web application
by me!
https://github.com/jlleblanc/nodejs-joomla
module for Joomla
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24. Q&A
Free to ask!
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