GlassFish is an open source and production-quality application server with full enterprise support from Sun Microsystems. In addition to traditional Java EE applications, it allows applications developed using different Ruby frameworks to be easily deployed as well. The choice of application frameworks is also available for Groovy/Grails and Python/Django apps and can be easily extended further. This talk will demonstrate how GlassFish provides an extensible framework that allow applications created using different Ruby frameworks can be easily deployed. The attendees will learn the different deployment models available in GlassFish through live coding examples and several customer use cases of Rails deployments on GlassFish. The talk will show how Rails, Sinatra, Merb and any Rack-based framework can be easily deployed on GlassFish. It demonstrates how popular Rails applications can be easily deployed on GlassFish without any modification, and shows how GlassFish Gem can be used as an effective alternative to WEBrick, Mongrel, and other traditional deployment models. It also explains the inner workings of GlassFish so that developers understand what’s happening under the hood. It will explain how standard Java monitoring technologies like JMX can be used to monitor/manage these applications. The session also demonstrates how NetBeans provides a comprehensive IDE for developing, running, and debugging a Rails application directly on GlassFish – all without using any Java code.

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