Ruby on Rails com certeza é a estrela que elevou Ruby ao patamar de linguagem praticamente obrigatória a todo programador moderno. Porém muitos esquecem que Rails não é a única forma de desenvolver aplicações Web e muitas vezes nem é a melhor opção. O Ecossistema Ruby evolui a passos largos, todos os novos frameworks Web em Ruby adotaram o padrão Rack, que facilita a interoperabilidade entre frameworks Ruby. Além disso muitos estão olhando para o mundo da alta concorrência com novas tecnologias como Node.JS, mas o mundo Ruby tem opções robustas e testadas em produção como EventMachine. Enfim, vamos tentar aumentar o leque de soluções web com Ruby, além do Rails, traçando um paralelo com a plataforma .NET.

1. Discutindo Rails
e Arquiteturas
a apresentação já vai começar ...

2. Discutindo Rails
e Arquiteturas

3. Fabio Akita
www.akitaonrails.com
@akitaonrails

4. Fabio Akita
www.akitaonrails.com
@akitaonrails
1990

5. Anos 80 Fim Anos 90 Século XXI

6. Anos 80 Fim Anos 90 Século XXI
Perl
Basic Pascal Java
C PHP
dBase Delphi Python ABAP
III
Ruby
Clipper
ASP .NET
ObjC
VB6

12. <prólogo>

15. Como o cliente Como o Líder de Como o Analista Como o Programador Como o Consultor de
explicou Projeto entendeu desenhou escreveu Negócios descreveu
Como o projeto foi Como Operações Como o cliente foi O que o cliente
Como foi o suporte
documentado instalou cobrado realmente queria

16. Requerimentos:
ENTENDIDO!

18. LOL

19. DESIGN

20. DESIGN

23. Pattern PADRÃO

24. STANDARD
Pattern PADRÃO
Default

25. “Pattern”

28. NÃO é “Standard”!

29. Christopher Alexander

34. cada padrão (“pattern”)
representa nosso melhor chute agora ...
os padrões ainda são hipóteses, ... e
portanto todos são tentativas, todos
livres para evoluir sob o impacto de
novas experiências e observações."
Christopher Alexander

36. 2 + 2 = 5!

37. 2 + 2 = 5!

38. 2 + 2 = 4!

44. Aqui estão os fatos. Que Aqui está a conclusão.
conclusões podemos Que fatos podemos
chegar com eles? suportar com eles?

56. 80

57. 20
80

58. 20
80
“Long Tail”

60. </prólogo>

62. Pequenos
(Startups?)
Grandes
(Enterprisey?)

63. Pequenos
(Startups?)
D DD Grandes
(Enterprisey?)

64. Pequenos
(Startups?)
DD ”
D ht Grandes
“Lig
(Enterprisey?)

65. Pequenos
(Startups?)
Grandes
(Enterprisey?)

67. Complexidade
Acidental

69. Ruby on Rails é a melhor forma de desenvolver
qualquer aplicação Web.

71. Todas as outras formas de desenvolver aplicações
Web são inferiores a Ruby on Rails.

73. Ruby on Rails é uma das maneiras competentes
de se desenvolver aplicações Web em alguns
cenários.

74. 1994
(linguagem)
2004
(framework web)

75. 1.8.7
1.9.2
1.9.3-dev
2.3.11
3.0.7
3.1-RC1

76. 1.8.7
1.9.2
1.9.3-dev
2.3.11
3.0.7
3.1-RC1

77. 1.8.7
1.9.2
1.9.3-dev
2.3.11
3.0.7
3.1-RC1

78. 1.8.7
1.9.2
1.9.3-dev
2.3.11
3.0.7
3.1-RC1

80. gem install rails
rails new nome_do_projeto

81. gem install rails
rails new nome_do_projeto

82. gem install rails
rails new nome_do_projeto
SIM! Via CLI! :-P

83. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

84. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

85. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

86. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

87. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

88. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

89. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

90. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

91. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

92. Request
Web Server
Rack Middlewares
Routes
Controller
View Model

93. Response Request
Web Server
Rack Middlewares
Routes
Controller
View Model

96. ~30 mil gems
~15 GB

98. bundle install

99. RubyGems Library Assembly (DLL)
Rake MSBuild
Bundler NuGet

100. > bundle list
Gems included by the bundle: * mail (2.2.19)
* abstract (1.0.0) * mime-types (1.16)
* actionmailer (3.0.7) * polyglot (0.3.1)
* actionpack (3.0.7) * rack (1.2.2)
* activemodel (3.0.7) * rack-mount (0.6.14)
* activerecord (3.0.7) * rack-test (0.5.7)
* activeresource (3.0.7) * rails (3.0.7)
* activesupport (3.0.7) * railties (3.0.7)
* arel (2.0.9) * rake (0.8.7)
* builder (2.1.2) * sqlite3 (1.3.3)
* bundler (1.0.13) * thor (0.14.6)
* erubis (2.6.6) * treetop (1.4.9)
* i18n (0.5.0) * tzinfo (0.3.27)

101. > bundle list
Gems included by the bundle: * mail (2.2.19)
* abstract (1.0.0) * mime-types (1.16)
* actionmailer (3.0.7) * polyglot (0.3.1)
* actionpack (3.0.7) * rack (1.2.2)
* activemodel (3.0.7) * rack-mount (0.6.14)
* activerecord (3.0.7) * rack-test (0.5.7)
* activeresource (3.0.7) * rails (3.0.7)
* activesupport (3.0.7) * railties (3.0.7)
* arel (2.0.9) * rake (0.8.7)
* builder (2.1.2) * sqlite3 (1.3.3)
* bundler (1.0.13) * thor (0.14.6)
* erubis (2.6.6) * treetop (1.4.9)
* i18n (0.5.0) * tzinfo (0.3.27)

102. > rake -T
rake log:clear
rake about rake middleware
rake db:create rake notes
rake db:drop rake notes:custom
rake db:fixtures:load rake rails:template
rake db:migrate rake rails:update
rake db:migrate:status rake routes
rake db:rollback rake secret
rake db:schema:dump rake stats
rake db:schema:load rake test
rake db:seed rake test:recent
rake db:setup rake test:uncommitted
rake db:structure:dump rake time:zones:all
rake db:version rake tmp:clear
rake doc:app rake tmp:create

103. > rails generate
Usage: rails generate GENERATOR [args] [options]
General options:
-h, [--help] # Print generator's options and usage
-p, [--pretend] # Run but do not make any changes
-f, [--force] # Overwrite files that already exist
-s, [--skip] # Skip files that already exist
-q, [--quiet] # Suppress status output
Please choose a generator below.
Rails: observer
controller performance_test
generator plugin
helper resource
integration_test scaffold
mailer scaffold_controller
migration session_migration
model stylesheets

104. > rake middleware Rack
Middlewares
use ActionDispatch::Static
use Rack::Lock
use ActiveSupport::Cache::Strategy::LocalCache
use Rack::Runtime
use Rails::Rack::Logger
use ActionDispatch::ShowExceptions
use ActionDispatch::RemoteIp
use Rack::Sendfile
use ActionDispatch::Callbacks
use ActiveRecord::ConnectionAdapters::ConnectionManagement
use ActiveRecord::QueryCache
use ActionDispatch::Cookies
use ActionDispatch::Session::CookieStore
use ActionDispatch::Flash
use ActionDispatch::ParamsParser
use Rack::MethodOverride
use ActionDispatch::Head
use ActionDispatch::BestStandardsSupport
run Demo::Application.routes

105. Response Request
Web Server
Rack Middlewares
Routes
Controller
View Model

106. Response Request
Web Server
Rack Middlewares
Routes
Controller
View Model

107. Response Request
Web Server
Application
Rack Middlewares Server Rack:
Mongrel,
Routes Thin,
Passenger,
Controller Unicorn
View Model

108. Web Server:
NginX
Response Request
Apache
Web Server
Application
Rack Middlewares Server Rack:
Mongrel,
Routes Thin,
Passenger,
Controller Unicorn
View Model

109. NginX, Apache, Lighty, IIS
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger
ActiveRecord/DataMapper
RDBMS/NoSQL

110. NginX, Apache, Lighty, IIS
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger TidyTDS
ActiveRecord/DataMapper
SQL Server
SQL Azure
RDBMS/NoSQL

111. NginX, Apache, Lighty, IIS
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger
ActiveRecord/DataMapper
ActiveResource/RestClient/Savon
WCF
RDBMS/NoSQL
Web Services (REST, SOAP)

112. HAProxy
NginX, Apache, Lighty, IIS
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger
ActiveRecord/DataMapper
ActiveResource/RestClient/Savon
RDBMS/NoSQL
Web Services (REST, SOAP)

113. HAProxy
NginX, Apache, Lighty, IIS
Varnish
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger
ActiveRecord/DataMapper
ActiveResource/RestClient/Savon
RDBMS/NoSQL
Web Services (REST, SOAP)

114. HAProxy
NginX, Apache, Lighty, IIS
Varnish
Reverse Proxy
Mongrel, Thin, Unicorn, Passenger
ActiveRecord/DataMapper
ActiveResource/RestClient/Savon
Memcache
RDBMS/NoSQL
Web Services (REST, SOAP)

115. Request Request Request Request Request Request
HTTPD HTTPD HTTPD HTTPD HTTPD HTTPD
Rails Rails Rails Rails Rails Rails
App App App App App App
RDBMS

116. Request Request Request Request Request Request
HTTPD HTTPD HTTPD HTTPD HTTPD HTTPD
Rails Rails Rails Rails Rails Rails
App App App App App App
RDBMS

117. Request Request Request Request Request Request
HTTPD HTTPD HTTPD HTTPD HTTPD HTTPD
Rails Rails Rails Rails Rails Rails
App App App App App App
Mais curto RDBMS
possível!

118. Thread Context Switch

119. Thread Context Switch

122. $(':checkbox').map(function() {
return this.id;
}).get().join(',');

125. Rails
Request
App

132. Eventos Assíncronos
Envio de mensagens

133. Request Request Request Request Request Request
HTTPD HTTPD HTTPD HTTPD HTTPD HTTPD
Rails Rails Rails Rails Rails Rails
App App App App App App
RDBMS

134. Request Request Request Request Request Request
NginX
Event
Machine
RDBMS

135. Request Request Request Request Request Request
NginX
Event
Machine “Look Ma!
No Threads!”
RDBMS

136. Request Request Request Request Request Request
NginX
5k ~ 10k
conexões
Event
Machine “Look Ma!
No Threads!”
RDBMS

137. Request Request Request Request Request Request
NginX
5k ~ 10k
conexões
Conexões
Longas Event
Machine “Look Ma!
No Threads!”
RDBMS

139. <script src="http://js.pusherapp.com/1.8/pusher.min.js">
</script>
<script>
var pusher = new Pusher('API_KEY');
var myChannel = pusher.subscribe('MEU_CANAL');
</script>

140. <script src="http://js.pusherapp.com/1.8/pusher.min.js">
</script>
<script>
var pusher = new Pusher('API_KEY');
var myChannel = pusher.subscribe('MEU_CANAL');
</script>

141. <script src="http://js.pusherapp.com/1.8/pusher.min.js">
</script>
<script>
var pusher = new Pusher('API_KEY');
var myChannel = pusher.subscribe('MEU_CANAL');
</script>

142. myChannel.bind('coisa-criada', function(thing) {
alert('Uma coisa foi criada: ' + thing.name);
});

143. myChannel.bind('coisa-criada', function(thing) {
alert('Uma coisa foi criada: ' + thing.name);
});

144. myChannel.bind('coisa-criada', function(thing) {
alert('Uma coisa foi criada: ' + thing.name);
});

145. require 'pusher'
Pusher.app_id = 'APP_ID'
Pusher.key = 'API_KEY'
Pusher.secret = 'SECRET_KEY'
class ThingsController < ApplicationController
def create
@thing = Thing.new(params[:thing])
if @thing.save
Pusher['MEU_CANAL'].trigger('coisa-criada',
@thing.attributes)
end
end
end

146. require 'pusher'
Pusher.app_id = 'APP_ID'
Pusher.key = 'API_KEY'
Pusher.secret = 'SECRET_KEY'
class ThingsController < ApplicationController
def create
@thing = Thing.new(params[:thing])
if @thing.save
Pusher['MEU_CANAL'].trigger('coisa-criada',
@thing.attributes)
end
end
end

147. require 'pusher'
Pusher.app_id = 'APP_ID'
Pusher.key = 'API_KEY'
Pusher.secret = 'SECRET_KEY'
class ThingsController < ApplicationController
def create
@thing = Thing.new(params[:thing])
if @thing.save
Pusher['MEU_CANAL'].trigger('coisa-criada',
@thing.attributes)
end
end
end

148. require 'pusher'
Pusher.app_id = 'APP_ID'
Pusher.key = 'API_KEY'
Pusher.secret = 'SECRET_KEY'
class ThingsController < ApplicationController
def create
@thing = Thing.new(params[:thing])
if @thing.save
Pusher['MEU_CANAL'].trigger('coisa-criada',
@thing.attributes)
end
end
end

149. Arquitetura de
Altíssima Concorrência

150. (

151. W. Edward Deming

153. IN GOD WE TRUST
Todos os outros devem trazer dados

155. EXPERIENCE BY ITSELF BRINGS
NOTHING

156. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C

157. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C
STANDARD

158. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C

159. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C

160. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C

161. Ciclo “Plan-Do-Check-Act”
(melhoria contínua)
P A
D C

162. )

170. Perl

172. Python

174. PHP

176. Ruby

177. OMG!

178. 2011
2010
2009
2008
2007 Ruby on Rails

179. 2011
2010
2009
2.0.5
2008 6
2007 Ruby on Rails 2.0.0

180. 2011
2010
2009
2.1.2
2.0.5 3
2.1.0
2008 6
2007 Ruby on Rails 2.0.0

181. 2011
2010
2.2.3
2009
2.1.2
4
2.2.0
2.0.5 3
2.1.0
2008 6
2007 Ruby on Rails 2.0.0

182. 2011 2.3.11
2010
2.2.3
12
2009
2.3.0
2.1.2
4
2.2.0
2.0.5 3
2.1.0
2008 6
2007 Ruby on Rails 2.0.0

183. 3.0.7
2.3.11
8
2011
2010 3.0.0
2.2.3
12
2009
2.3.0
2.1.2
4
2.2.0
2.0.5 3
2.1.0
2008 6
2007 Ruby on Rails 2.0.0

184. 3.0.7
2011 2.3.11
2010 3.0.0
2.2.3
2009
2.1.2
2.3.0
31
2.2.0 Versões!
2.0.5
2.1.0
2008
2007 Ruby on Rails 2.0.0

186. Request
Web Server
Rails
App
/public/stylesheets

187. Request
Web Server
Arquivos
Estáticos Rails
App
/public/stylesheets

189. Variáveis
$blue: #3bbfce;
$margin: 16px; /* CSS */
.content-navigation { .content-navigation {
border-color: $blue; border-color: #3bbfce;
color: color: #2b9eab;
darken($blue, 9%); }
}
.border {
.border { padding: 8px;
padding: $margin / 2; margin: 8px;
margin: $margin / 2; border-color: #3bbfce;
border-color: $blue; }
}

190. Nesting
table.hl { /* CSS */
margin: 2em 0;
td.ln { table.hl {
text-align: right; margin: 2em 0;
} }
} table.hl td.ln {
text-align: right;
li { }
font: {
family: serif; li {
weight: bold; font-family: serif;
size: 1.2em; font-weight: bold;
} font-size: 1.2em;
} }

191. Mixins
@mixin table-base {
th {
/* CSS */
text-align: center;
font-weight: bold;
#data {
}
td, th {padding: 2px} float: left;
} margin-left: 10px;
}
@mixin left($dist) { #data th {
float: left; text-align: center;
margin-left: $dist; font-weight: bold;
}
}
#data td, #data th {
#data {
@include left(10px); padding: 2px;
@include table-base; }
}

192. Selector Inheritance
/* CSS */
.error {
.error, .badError {
border: 1px #f00;
border: 1px #f00;
background: #fdd;
background: #fdd;
}
}
.error.intrusion {
font-size: 1.3em;
.error.intrusion,
font-weight: bold;
.badError.intrusion {
}
font-size: 1.3em;
font-weight: bold;
.badError {
}
@extend .error;
border-width: 3px;
.badError {
}
border-width: 3px;
}

194. class Animal
constructor: (@name) ->
move: (meters) ->
alert @name + " moved " + meters + "m."
class Snake extends Animal
move: ->
alert "Slithering..."
super 5
class Horse extends Animal
move: ->
alert "Galloping..."
super 45
sam = new Snake "Sammy the Python"
tom = new Horse "Tommy the Palomino"
sam.move()
tom.move()

195. var Animal, Horse, Snake, sam, tom;
var __hasProp = Object.prototype.hasOwnProperty,
__extends = function(child, parent) {
for (var key in parent) { if (__hasProp.call(parent,
key)) child[key] = parent[key]; }
function ctor() { this.constructor = child; }
ctor.prototype = parent.prototype;
child.prototype = new ctor;
class Animal child.__super__ = parent.prototype;
constructor: (@name) -> return child;
};
Animal = (function() {
move: (meters) -> function Animal(name) {
this.name = name;
alert @name + " moved " + meters + "m." }
Animal.prototype.move = function(meters) {
return alert(this.name + " moved " + meters + "m.");
class Snake extends Animal };
return Animal;
move: -> })();
alert "Slithering..." Snake = (function() {
__extends(Snake, Animal);
super 5 function Snake() {
Snake.__super__.constructor.apply(this, arguments);
}
class Horse extends Animal Snake.prototype.move = function() {
alert("Slithering...");
move: -> return Snake.__super__.move.call(this, 5);
alert "Galloping..." };
return Snake;
super 45 })();
Horse = (function() {
__extends(Horse, Animal);
sam = new Snake "Sammy the Python" function Horse() {
tom = new Horse "Tommy the Palomino" Horse.__super__.constructor.apply(this, arguments);
}
Horse.prototype.move = function() {
alert("Galloping...");
sam.move() return Horse.__super__.move.call(this, 45);
tom.move() };
return Horse;
})();
sam = new Snake("Sammy the Python");
tom = new Horse("Tommy the Palomino");
sam.move();
tom.move();
loadrun

198. 102

199. Request Request
Web Server Web Server
(Desenvolvimento) (Produção)
Rails
App
/app/assets /public

200. Request Request
Web Server Web Server
(Desenvolvimento) (Produção)
Rails
Sprockets
App
/app/assets /public

201. Request Request
Web Server Web Server
(Desenvolvimento) (Produção)
Rails
Sprockets
App
Tilt
/app/assets /public

202. Request Request
Web Server Web Server
(Desenvolvimento) (Produção)
Rails
Sprockets
App
Tilt
Ugli er
/app/assets /public

203. ENGINE FILE EXTENSIONS REQUIRED LIBRARIES
ERB .erb, .rhtml
none
Interpolated String .str
Erubis .erb, .rhtml, .erubis erubis
Haml .haml haml
Sass .sass
sass
Scss .scss
Less CSS .less less
Builder .builder builder
Liquid .liquid liquid
RDiscount rdiscount
Redcarpet redcarpet
BlueCloth .markdown, .mkd, .md bluecloth
Kramdown kramdown
Maruku maruku
RedCloth .textile redcloth
RDoc .rdoc rdoc
Radius .radius radius
Markaby .mab markaby
Nokogiri .nokogiri nokogiri
CoffeeScript .coffee coffee-script
Creole (Wiki markup) .creole creole

204. Rails 3.1:
Release Candidate
(may 2011)

210. RubyConf
Brasil
3 e 4 de Novembro
www.rubyconf.com.br

211. <epílogo>

212. Pedro Franceschi
@pedroh96

213. 15 anos
Pedro Franceschi
@pedroh96

214. 9 anos
Pedro Franceschi
@pedroh96

215. 6 anos
Pedro Franceschi
@pedroh96

216. Pedro Franceschi
@pedroh96

221. </epílogo>

222. Obrigado!
www.akitaonrails.com
u.akita.ws/dnad11
.com.br