![[“iterate rapidly”,
“re-use code”,
“jvm”,
“hire ruby people”,
“have fun”].each { |important_thing|
important_thing.capitalize!
}](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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JRuby Meetup
- 1. JRubifying LinkedIn’s Front-end http://www.linkedin.com/in/baquera http://sna-projects/sna
- 2. [“iterate rapidly”, “re-use code”, “jvm”, “hire ruby people”, “have fun”].each { |important_thing| important_thing.capitalize! }
- 4. front-end back-end homepage service profile service inbox service
- 5. Existing full-featured ? custom Java web application framework JRuby using Spring MVC and a custom JSP compiler deployed to Tomcat
- 6. Tomcat < Servlet API Request - production webapps deployed as wars
- 7. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC Request - security - authentication - tracking - service layer
- 8. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC SiteMesh Request - 3rd party open source library - header, footer control
- 9. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC SiteMesh Request JRuby-Rack - bridge between Servlet and Rack - customized LinkedIn Rack servlet for special case error handling - control transferred via named dispatcher
- 10. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC SiteMesh Request JRuby-Rack Sinatra - custom service DSL for making asynchronous backend calls (based on protobufs) - custom Sinatra extensions that wrap Java framework fxnality: ---> url generation ---> logging ---> authentication ---> resource formatting
- 11. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC SiteMesh Request JRuby-Rack Sinatra get ‘/hello’ do erb :layout end <html> <head> <title>Hi</title> </head> <body> Hello from JRuby! </body> </html>
- 12. Tomcat < Servlet API Custom LinkedIn Filters + Servlet < Spring MVC SiteMesh Request JRuby-Rack Sinatra get ‘/hello’ do erb :layout end <html> <head> <title>Hi</title> </head> <body> Hello from JRuby! </body> </html> Response
- 13. require ‘demo’
- 14. The Java virtual machine knows nothing of the Java programming language, only of a particular binary format, the class file format. A class file contains Java virtual machine instructions (or bytecodes) and a symbol table, as well as other ancillary information. -- JVM Specification
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