A look at the impossible, the marriage between Ruby and Spring. integrallis.com

1. Rails on Spring
Using JRuby as the Secret Sauce
Brian Sam-Bodden

2. Agenda
The State of Java and JEE
Ruby on Rails to the Rescue
Ruby makes Rails possible
The Spring Framework

3. Agenda
JRuby - Ruby on Steroids
JRuby on Rails
JRuby for Rapid Spring Prototyping
JRuby on Rails and Spring

4. The State of Java and JEE

5. Java & JEE
the most prevalent language
the most complete enterprise platform
a rich ecosystem of web frameworks
a vibrant open source community

6. Java & JEE
plagued by mediocre web frameworks
not well suited for rapid prototyping
in need of a dynamic language web framework
one level of abstraction too low for the web

7. Who could help Java on the Web Tier?

8. Ruby on Rails
a revolutionary web framework
complete MVC solution
fast prototyping
killer AJAX support

9. Ruby on Rails
a DSL for the web
leading the pack on the web 2.0 front
born from a product, not a committee
a vibrant open source community

10. Ruby makes Rails possible

11. ✓Object-Oriented
✓Elegant ✓General Purpose
✓ Multi-paradigm
Ruby ✓ Interpreted
is...
✓Reflective ✓Dynamic
✓ Garbage-collected

12. The Spring Framework
A breath of fresh air for Java

13. The Spring Framework
is a layered Java/J2EE application framework
is a lightweight IoC and AOP framework
is one level of abstraction up from JEE
is the leading framework to build enterprise applications

14. The Spring Framework
let’s you use all of the power of JEE
integrates seamlessly with Hibernate
POJO-based development keeps your code clean
harnesses the power of IoC and AOP

15. The Spring Framework
Spring 2.0 supports dynamic languages
support for JRuby, Groovy and BeanShell
beans can be backed by dynamic languages
scripted MVC controllers

16. JRuby
Ruby on Steroids

17. JRuby
100% pure-Java implementation of Ruby
brings Ruby to the JVM
started in 2002, now under Sun’s auspice
open source with a growing community

18. JRuby
call Ruby from Java or Java from Ruby
lots of sub-projects emerging
better scalability with native threading
native unicode support

19. JRuby
specialized JRuby offerings are appearing...

20. The good gets better

21. JRuby on Rails
the agility of rails - the scalability of Java
JRuby likely to surpass Ruby in speed
sneak Ruby and RoR into the enterprise!

22. JRuby on Rails

23. JRuby on Rails

24. JRuby on Rails
JEE servers are good at scaling up
no more multi-process management
use JRuby “multi-VM” support
leverage the maturity of the JVM and JEE servers

25. JRuby on Rails
deploy your Rails app as a WAR
leverage JDBC from ActiveRecord

26. JRuby
For Rapid Spring Prototyping
...one way of sneaking Ruby in through the back door

27. JRuby+Spring RAD
a simple example by the folks at jobster
use JRuby for rapid prototyping
Spring controller that delegates to a JRuby controller
JRuby controllers live alongside your JSPs

28. JRuby+Spring RAD
Simple JRuby controller

29. JRuby+Spring RAD
JSP view provides input to the Ruby controller

30. JRuby+Spring RAD
JSP view provides input to the Ruby controller

31. JRuby+Spring RAD
this experimental library supports:
✓access to Spring beans from JRuby code
✓ access to Hibernate queries

32. The Perfect Pairing
for a Java Shop
JRuby on Rails + Spring

33. JRoR on Spring
Chris Nelson’s work
✓use rails-integration plugin
✓ expose WebApplicationContext in a RoR controller
✓include Spring - Spring plugin for JRuby

34. JRoR on Spring
✓install goldspike rails-integration plugin on you JRoR app
✓ rake war:standalone:create to package a WAR with:
➡Your RoR app
➡JRuby and Rails libraries

35. JRoR on Spring
rake war:standalone:create in action:

36. JRoR on Spring
generated WARs work on many servers:
✓Tomcat ✓Glassfish
✓Jetty ✓JBoss

37. JRoR on Spring
✓ add Chris’ Spring module:

38. JRoR on Spring
✓ Expand the generated WAR
✓Add Spring application
➡ Application Code
➡ Libraries (Jars)
➡ Config Files

39. JRoR on Spring
✓ access your Spring beans from a RoR controller

40. JRoR on Spring
✓add a new face to your Spring applications
✓ leverage thousands of open source projects
✓leverage the good parts of JEE like JDBC and JMS

41. Resources
JRuby
www.jruby.org
rubyforge.org/projects/jruby-extras
JRuby Rails Integration
www.headius.com/jrubywiki/index.php/Rails_Integration
headius.blogspot.com/2006/11/advanced-rails-deployment-with-jruby.html
RAD Spring Prototyping with JRuby
thebogles.com/blog/projects/ruby-on-spring/
www.botspiritcompany.com/src/springruby/example_ruby_spring.html
Chris Nelson’s Work
mysterycoder.blogspot.com/2007/06/spring-jruby.html
mysterycoder.blogspot.com/2007/06/include-spring.html

42. Books by Integrallis
Yes, they are all Java books :-(

43. Thanks!