GlassFish can support multiple Ruby frameworks like Ruby on Rails, Sinatra, Merb, and JRuby. It allows Ruby applications to take advantage of features like database connection pooling, management, and monitoring. Developers can deploy Ruby applications to GlassFish as a WAR file or using the glassfish command line tool.

1. GlassFish can support multiple
Ruby frameworks ... really ?
Arun Gupta, Oracle Corp
blogs.sun.com/arungupta, @arungupta

2. What is GlassFish ?

3. What is GlassFish ?

4. GlassFish: It's a Community!

5. GlassFish: Lives on java.net
Since 2005

6. GlassFish: Reference Implementation

7. GlassFish v3

11. JRuby
• Ruby interpreter written in Java
• Current Version: 1.4.0
• 1.5 RC coming soon
• Ruby 1.8.7 compatible
• Some Ruby 1.9 support
• --1.9 flag (80%)

12. • Solid performance (~Ruby 1.9)
• Startup is poor, execution usually better than 1.9
• Runs native threads
• Foreign Function Interface (FFI)for C
libraries
• Adopted from Rubinius, CRuby gem
• Runs Rails great!

13. Ruby Frameworks on GlassFish

14. GlassFish v3 Architecture
JSF Grails ... Rails Merb ... Django ...
Servlet Spec Rack WSGI
Web JRuby Jython
Container Container Container
V3 Kernel
Grizzly
JVM
Key GlassFish v3 Modules Java Framework Python Framework
Web Framework
Ruby Framework
Interface

15. Why Ruby on GlassFish ? - Agile

16. Why ? - Easy prototyping, yet powerful

17. Why ? - Best of both worlds

18. Why ? - Database Connection Pooling

19. Why ? - Management

20. Why ? - Monitoring

21. Rails Deployment choices
Directory, WAR, Gem

23. jruby -S gem install glassfish
jruby -S rails helloworld
cd helloworld
jruby -S glassfish
http://blogs.sun.com/arungupta/entry/totd_70_jruby_and_glassf sh
i

24. jruby -S glassfish -h
-c: change the context root
-e: environment
-d: Runs as daemon
-P: location of PID file
-l: log file location
-log-level: Logging level (0-7)

25. asadmin start-domain
asadmin deploy
--property "jruby.home=JRUBY_HOME"
helloworld
Complete
Absolute
Path

26. http://wiki.glassf sh.java.net/Wiki.jsp?page=GlassFishV3CapistranoRecipes
i

27. jruby -S gem install warbler
jruby -S warble
http://blogs.sun.com/arungupta/entry/totd_73_jruby_and_glassf sh
i

28. WAR Deployment: Packaging

29. http://blogs.sun.com/arungupta/entry/totd_80_sinatra_crud_application

30. Any Rack-based framework ...
http://weblogs.java.net/blog/vivekp/archive/2009/04/plugin_any_ruby.html

31. Deployment Options
http://blogs.sun.com/arungupta/entry/totd_81_how_to_use
http://blog.headius.com/2009/04/apache-jruby-rails-glassf sh-easy.html
i

32. NetBeans: Develop with Pleasure
http://blogs.sun.com/arungupta/entry/screencast_26_develop_run_debug

33. Ruby Monitoring
• Basic Monitoring
• jinfo: System properties and VM CLI flags
• jmap: Shared object memory map
• jstack: Stack traces of Java threads
• jstat: Performance statistics on class, JIT compiler, GC, ...
• Advanced
• jconsole / Visual VM
• NewRelic, FiveRuns, ...

34. jConsole
http://blogs.sun.com/arungupta/tags/rubyonrails+jmx

37. Who loves Ruby on GlassFish ?

38. Turbo charging your JRuby Startup
• “-client” or “-server” ? (Upto 50%)
• Faster startup or solid runtime ?
• export JAVA_OPTS=”-client -D32”
• Upto 50% improvement
• For Linux: Class Data Sharing
• Delay or disable JRuby's JIT (Upto 10%)
• -X-C
• jruby.compile.mode=OFF
• Avoid spawning “sub-Rubies”
• Nailgun for small JRuby CLI invocations
• Favorite JVM Flags
http://blog.headius.com/2010/03/jruby-startup-time-tips.html

39. Resources
• glassfish.org
• blogs.sun.com/theaquarium
• glassfish-scripting.dev.java.net
• @glassfish

40. GlassFish can support multiple
Ruby frameworks ... really ?
Arun Gupta, Oracle Corp
blogs.sun.com/arungupta, @arungupta