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![# app/models/owner.rb
java_import org.springframework.samples.petclinic.Owner
class Owner
extend ActiveModel::Naming
include ActiveModel::Validations
include ActiveModel::Conversion
validates_presence_of :first_name, :last_name,
:address, :city, :telephone
validates_format_of :telephone, :with => /[-0-9.+ ]+/,
:message => "..."
end](https://image.slidesharecdn.com/fromjavatorails-111214211105-phpapp01/85/From-java-to-rails-55-320.jpg)
![# config/initializers/classpath.rb
module Maven
extend self
CLASSPATH = [
"#{BASEDIR}/target/classes",
"#{ENV['HOME']}/.m2/.../org.springframework.core-3.0.0.RELEASE.jar",
# lots of jars here...
]
def set_classpath
require 'java'
CLASSPATH.each {|p| $CLASSPATH << p }
end
end](https://image.slidesharecdn.com/fromjavatorails-111214211105-phpapp01/85/From-java-to-rails-61-320.jpg)
![Maven.set_classpath
module Spring
SPRING_XML_CONFIG_FILES = [
'classpath:applicationContext.xml'
].to_java :string # creates a String[]
CONTEXT = ClassPathXmlApplicationContext.new(
SPRING_XML_CONFIG_FILES)
end](https://image.slidesharecdn.com/fromjavatorails-111214211105-phpapp01/85/From-java-to-rails-62-320.jpg)
![# config/warble.rb
Warbler::Config.new do |config|
require 'config/initializers/classpath'
config.java_libs += Maven.jar_files
config.java_classes = FileList["target/classes/**/*"]
end](https://image.slidesharecdn.com/fromjavatorails-111214211105-phpapp01/85/From-java-to-rails-64-320.jpg)
From java to rails
- 1. From Java...to Rails Nick Sieger @nicksieger
- 2. Are you happywith your development pace ?
- 3. ? How do youget to a place where it’s better?
- 5.
- 6. Replace JSF with *Anything*
- 7.
- 8. Built environment long-running projects with legacy codebases
- 9.
- 10. passion facade nativity facade scaffolded interior
- 11. Ryugyong Hotel, 2004 North Korea 2011
- 12.
- 13.
- 14. Metaphor Use Ruby, JRuby, and Rails to... Sagrada • Build new facade faster Familia • Scaffolding during refactoring Ryugyong • Revive a project with a new face Hotel Seismic • Reinforce business rules with a DSL retrofit • Harden security Szkieletor • Find novel uses for abandoned code
- 15. Metaphor Use Ruby, JRuby, and Rails to... Sagrada • Build new facade faster Familia • Scaffolding during refactoring Ryugyong • Revive a project with a new face Hotel Seismic • Reinforce business rules with a DSL retrofit • Harden security Szkieletor • Find novel uses for abandoned code
- 16. Metaphor Use Ruby, JRuby, and Rails to... Sagrada • Build new facade faster Familia • Scaffolding during refactoring Ryugyong • Revive a project with a new face Hotel Seismic • Reinforce business rules with a DSL retrofit • Harden security Szkieletor • Find novel uses for abandoned code
- 17. Metaphor Use Ruby, JRuby, and Rails to... Sagrada • Build new facade faster Familia • Scaffolding during refactoring Ryugyong • Revive a project with a new face Hotel Seismic • Reinforce business rules with a DSL retrofit • Harden security Szkieletor • Find novel uses for abandoned code
- 18. Metaphor Use Ruby, JRuby, and Rails to... Sagrada • Build new facade faster Familia • Scaffolding during refactoring Ryugyong • Revive a project with a new face Hotel Seismic • Reinforce business rules with a DSL retrofit • Harden security Szkieletor • Find novel uses for abandoned code
- 19. Biological evolution new replaces old over time
- 20.
- 23.
- 24.
- 25. Test Plan Don’t leavehome without it
- 26.
- 27. Bundler source :rubygems group :test do gem 'rspec-rails' gem 'cucumber-rails' gem 'capybara' end
- 29. Feature: Owners Scenario: Add New Owner Given I am on the new owner page When I fill in the following: | First name | Dan | | Last name | Wood | | Address | 123 Main St | | City | Anywhere | | Telephone | 5555555 | And I press "Add Owner" Then I should see "Owner Information" within "h2" And I should see "Dan Wood"
- 32. Foot in thedoor Sneaking Ruby in
- 33.
- 34. Servlet Java Ruby /* /rack/* App
- 35. <listener> <listener-class> org.jruby.rack.RackServletContextListener </listener-class> </listener> <servlet> <servlet-name>rack</servlet-name> <servlet-class>org.jruby.rack.RackServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>rack</servlet-name> <url-pattern>/rack/*</url-pattern> </servlet-mapping>
- 36. # WEB-INF/config.ru require 'sinatra' ifdevelopment? require 'sinatra/reloader' use Rack::ShowExceptions end require 'app' set :run, false run Sinatra::Application
- 37. # app.rb get '/rack/'do '<h1>Sinatra</h1>' end
- 38.
- 39. URIs + HREFs Architecture of the Web
- 40. <a href="/vets.xml">View asXML</a>
- 41.
- 42. In JSPs <jruby-rack:rails path="/rack/vets"params="layout=none"/>
- 43. Red Green Refactor Continuous improvement
- 45. Interceptor pattern Partial strangulation
- 46. Filter /owners Java/ / /vets /owners /1/pets Spring App
- 47. Filter / /vets Ruby /owners Java/ / /vets /owners /1/pets Spring App
- 48. SpringPetclinic::Application.routes.draw do root :to => "welcome#index" resources :vets end
- 49. Rails Java Request response response / 200 OK (N/A) 404 Not /owners 200 OK Found
- 50. Re-use views JSP-in-ERB
- 51. <%= request.render '/WEB-INF/jsp/header.jsp'%> <%= yield %> <%= request.render '/WEB-INF/jsp/footer.jsp' %>
- 52. Re-use models Hibernate + ActiveModel
- 53.
- 54. # app/models/owner.rb java_import org.springframework.samples.petclinic.Owner classOwner extend ActiveModel::Naming include ActiveModel::Validations include ActiveModel::Conversion end
- 55. # app/models/owner.rb java_import org.springframework.samples.petclinic.Owner classOwner extend ActiveModel::Naming include ActiveModel::Validations include ActiveModel::Conversion validates_presence_of :first_name, :last_name, :address, :city, :telephone validates_format_of :telephone, :with => /[-0-9.+ ]+/, :message => "..." end
- 56. <%# app/views/owner/_form.html.erb %> <%=form_for @owner do |f| %> <%= f.label :first_name %> <br/> <%= f.text_field :first_name %> <%= f.label :last_name %> <br/> <%= f.text_field :last_name %> <%# ... %> <% end -%>
- 57. <%# app/views/owner/_form.html.erb %> <%=form_for @owner do |f| %> @owner <%= f.label :first_name %> <br/> <%= f.text_field :first_name %> <%= f.label :last_name %> <br/> <%= f.text_field :last_name %> <%# ... %> <% end -%>
- 58. Rails takes over Final strangulation
- 59. $ rails newpetclinic --skip-active-record
- 60.
- 61. # config/initializers/classpath.rb module Maven extend self CLASSPATH = [ "#{BASEDIR}/target/classes", "#{ENV['HOME']}/.m2/.../org.springframework.core-3.0.0.RELEASE.jar", # lots of jars here... ] def set_classpath require 'java' CLASSPATH.each {|p| $CLASSPATH << p } end end
- 62. Maven.set_classpath module Spring SPRING_XML_CONFIG_FILES = [ 'classpath:applicationContext.xml' ].to_java :string # creates a String[] CONTEXT = ClassPathXmlApplicationContext.new( SPRING_XML_CONFIG_FILES) end
- 63. Warbler INSTALL gem install warbler
- 64. # config/warble.rb Warbler::Config.new do|config| require 'config/initializers/classpath' config.java_libs += Maven.jar_files config.java_classes = FileList["target/classes/**/*"] end
- 65. $ warble executablewar Creating refactoring-to-rails.war $ java -jar refactoring-to-rails.war
- 66. Hollow out thetree
- 67. JRuby T-Shirts! Stop bybooth #5605
- 68.
- 69. ➡ Script Bowl Nic Williams Wed 8:30 AM–Hilton Grand Ballroom B ➡ Accelerate Your Business and Aim for the Cloud with Java and JRuby Jacob Lehrbaum, Mike Piech Wed 3:00 PM–Parc 55 Embarcadero ➡ Real World JRuby Charles Nutter, Thomas Enebo Wed 4:30 PM–Parc 55 Market Street
- 71.