Rails on JRuby

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A presentation I delivered to the Melbourne Ruby User's Group on some of the things Rails developers need to be aware of when getting a Rails application running on top of JRuby.

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Rails on JRuby

  1. 1. JRuby & Rails Jumping tracks with minimal pain
  2. 2. Contents • JRuby & Rails • Why? • Things to Watch • Databases • Servers & Deployment • Beyond Rails with JRuby
  3. 3. Why Rails on JRuby?
  4. 4. Why? • Easier deployments • Potential scalability
  5. 5. Warning Signs?
  6. 6. Danger! • Relying upon Native Code • Gems • Standard Library
  7. 7. Databases • Pure Ruby Drivers • Slow(er) • Most Compatible
  8. 8. ActiveRecord-JDBC • JDBC: Java’s Native Database Protocol • More Databases Supported • Faster • Odd compatibility issues?
  9. 9. Database Config Demo
  10. 10. Deployment • Deploying to Mongrels/etc. = JRuby 1.0 • Deploying to Java = Preferred JRuby 1.1+
  11. 11. Serving from Java • Packaging your application • Getting it to the server
  12. 12. Packaging with Warbler • Packaging your Rails app for Java Servers • Resultant artefact is a deployable Application
  13. 13. Warbler Config Demo
  14. 14. Java on Development • script/server still works • jetty_rails • glassfish_rails
  15. 15. Moving to Production • Java 5 (or higher) is the key!
  16. 16. Beyond Rails? • Calling Rails from a Java webapp? • Use Merb? Camping?
  17. 17. Beyond Rails? • Rack support!
  18. 18. Links • JRuby • http://www.jruby.org • http://wiki.jruby.org • JRuby Inside: http://www.jrubyinside.com • Nick Sieger: http://blog.nicksieger.com/

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