Agenda
• Sinatra Introduction
• Real Example
• Rack
• Rails Intergation

• http://twitter.com/xdite
• http://blog.xdite.net
• Rails Developer

Sinatra is ...
• ruby web framework library
• not MVC ( Model-View-Controller )
• DSL for defining RESTful HTTP actions

RAILS LINGO
ORM , MVC , Testing , Mail ,
Generator, RJS, I18n, Template , Engine .....

SINATRA LINGO
GET / POST / PUT / DELETE , request
paramenters, response, views , helpers , configure , rack

Single file web-app

Single file web-app

Hello World!

HTTP actions

Routes

Views

Helpers

Filter

Configure

• Web Service / API
• Tiny Web Application
• Rails Metal

Web Service / API

Requests per second: 81.09 [#/sec] (mean)
Time per request: 12.332 [ms] (mean) Rails action
Requests per second:450.56 [#/sec] (mean) Sinatra
Time per request: 2.219 [ms] (mean)
Ubuntu 8.04, Intel Atom N270 @1.60GHz

Tiny Web Application

• simple
• cherry pick
• ActiveRecord / Datamapper
• Prototype / jQuery

twitter IE6

• CodeIgniter - PHP framework
• Twitter API
• LOC : 1000+
• NOT support CJK

require 'rubygems'
require 'sinatra'
require 'twitter_search'
get '/' do
@client = TwitterSearch::Client.new 'politweets'
@results = @client.query :q => '@MrIE6'
erb :home
end
10 ..

• ORM
• Paginate

40

Rails Metal with Sinatra

Rack provides a minimal interface
between webservers supporting Ruby and Ruby frameworks
Core Code Middleware Mongrel
rack middleware

http Profiling Security Caching
Middleware Middleware Middleware
Handler
Core Code
for Rack

$ rake middleware

Scaling Rails - Metal
• Rack action
• Sinatra Metal app

Performance

class OldPollerController < ApplicationController
def poller
render :text => "Hello World!"
end
end
class Poller < Rails::Rack::Metal
def call(env)
if env["PATH_INFO"] =~ /^/poller/
[[200], {"Content-Type" => "text/html"}, "Hello, World!"]
else
[[404], {"Content-Type" => "text/html"}, "Not Found"]
end
end
end
25

Requests per second: 81.09 [#/sec] (mean) Rails action
Time per request: 12.332 [x`x] (mean)
Requests per second: 163.75 [#/sec] (mean) Metal + Sinatra
Time per request: 6.107 [ms] (mean)
Ubuntu 8.04, Intel Atom N270 @1.60GHz

Q &A

Resources
• Scaling Rails : Episode #14 Rack
• RailsCast: Episode #251 Rack Middleware
• Pragprog.com : Classy Web Development
with Sinata
• Github / xdite : tweesage-message-wall