Dynamic Languages in
GlassFish v3 Prelude
GlassFish Webinar
Vivek Pandey
Developer, Glassfish Team
Sun Microsysems, Inc.
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GlassFish v3 - A Dynamic AppServer
Productivity, performance
• GlassFish v3
> Lightweight, Modular, Extensible, Embeddable
• Reasonable and efficient deployment choice
> Native, WAR style, embedded GlassFish
• App Server feature for everyone
> Database connection pooling
> Native threading, non-blocking IO, ARP
> Management – Monitor, Deploy, Troubleshooting
> Access to enterprise stack
– Metro, Jersey, JMS/MQ, Grizzly, JBI etc. 3

Overall Architecture
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JRuby on Rails
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Why Ruby on GlassFish?
• GlassFish v3 server is tested platform
> Co-host Java and Rails
> Known Deployment and Management
• “Green” alternative – One command, One instance,
One process
• Multiple Requests by a Single Application
• Database Connection Pooling
• Not just Rails – Merb, Sinatra...
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More benefits...
• No packaging, simple deployment
> asadmin deploy depot/
• Deploy as WAR
> warble #creates WAR file
> asadmin deploy depot.war
• Tested JRuby runtime at Updatecenter
> bin/updatetool
> No more config needed
• Commercially supported by Sun
• http://wiki.glassfish.java.net/Wiki.jsp?page=GettingStartedGuide
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GlassFish v3 Runtime
Grizzly Listener
.
Rails Web . XXX
Adapter Adapter Adapter
.
Rails
Runtime
Pool
JRuby
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Runtime Pool Management
• Automatic JRuby runtime pool management
Gem Create
JRuby Rails
Startup Runtime
JRuby
Load Rails
Environment
Add to Rails
Runtime
Pool JRuby
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Configuring JRuby Runtime Pool
• On GlassFish v3 Prelude Server
> System properties
– -Djruby.runtime.min : Sets the fewest runtimes to have in the
pool
– -Djruby.runtime : Sets the initial number of runtimes to create
– -Djruby.runtime.max : Sets the maximum number of runtimes to
have active
> Add these system properties as <jvm-options> elements
inside domain.xml
> Or, if using java CLI simply provide it using -D option
– java -Djruby.home=... -Djruby.runtime.max=2 -jar
modules/glassfish.jar
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Configuring JRuby Runtime Pool
• GlassFish gem
> CLI options
– -n, --runtimes
– Number of JRuby runtimes to crete initially
– --runtimes-min
– Minimum JRuby runtimes to crete
– --runtimes-max
– Maximum number of JRuby runtimes to crete
> glassfish -n 2 –runtimes-min 1 –runtimes-max 6
– Starts glassfish gem with 2 JRuby runtimes, the minimum pool
size is 1 and maximum size it can grow up to is 6
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JRuby Bundle - Updatecenter
• glassfish-install/bin/updatetool
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NetBeans Tooling
• NetBeans support
> Develop, deploy debug
> Screencast
– http://weblogs.java.net/blog/arungupta/archive/2008/11/screencast_26_d.html
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GlassFish gem
• Rails developer friendly
• Based on GlassFish v3 nucleus
• Distributed as ruby gem
• Install
> gem install glassfish
• Run
> cd myAp
> glassfish
• More info
> http://glassfishgem.rubyforge.org/
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GlassFish Gem
• Latest 0.9.0 released
• Features
> Rack based architecture
– Pluggable ruby frameworks
> Merb support
– JRuby and Merb native extension issue
$jruby -S gem install merb-core merb-more
$merb-gen core hello
$cd hello
$glassfish
• Framework auto-detection
> Need just one command 'glassfish'
• Details at: http://glassfishgems.rubyforge.org/ 15

Demo – GlassFish Gem
• Demo screencast
> http://mediacast.sun.com/users/vivek.pandey/media/gemdemo
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Groovy on Grails
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Groovy on Grails
• An MVC frameworks
• Based on Groovy, Spring, Hibernate, SiteMesh
> But hides all the complexity
• Adopts Rails paradigms
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Grails – Setup and Installation
• Install Grails IPS package using updatetool
> Grails package is installed inside 'glassfish' directory
• Grails IPS package
> Provides the following benefits over Grails distributions
found elsewhere
– grails shaed-war
– Lightweight, efficient application WAR
– Less prone to OOM due to lack of PermGen space on hot deployments
– grails run-app
– Runs GlassFish v3 Prelude in embedded mode
– Develop and test your grails app on the same server you would deploy
during production
• Set GRAILS_HOME environment variable
> export GRAILS_HOME=glassfish-install/grails
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Groovy on Grails - Updatecenter
• glassfish-install/bin/updatetool
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Groovy on Grails
• Development and production on the same server
> Develop using GlassFish v3 embedded server
– grails run-app
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Groovy on Grails
• Development and production on the same server
> Develop using GlassFish v3 embedded server
– grails run-app
> Production deployment
– asadmin deploy grailsApp.war
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Groovy on Grails
• Development and production on the same server
> Develop using GlassFish v3 embedded server
– grails run-app
> Production deployment
– asadmin deploy grailsApp.war
• Efficient WAR packaging
> grails shared-war
– Creates smaller WARs ~200KB vs 18MB
– asadmin deploy –-libraries $GRAILS_HOME/lib/glassfish-
grails.jar grailsApp.war
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Groovy on Grails
• Development and production on the same server
> Develop using GlassFish v3 embedded server
– grails run-app
> Production deployment
– asadmin deploy grailsApp.war
• Efficient WAR packaging
> grails shared-war
– Creates smaller WARs ~200KB vs 18MB
– asadmin deploy –-libraries $GRAILS_HOME/lib/glassfish-
grails grailsApp.war
• For details
> http://wiki.glassfish.java.net/Wiki.jsp?page=GrailsGettingStarted
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Groovy on Grails – Screencast
• From Zero to Grails in 5 minutes with GlassFish v3 Prelude
> https://slx.sun.com/1179271912
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Jython on Django
• Jython 2.5 nearing release
> Jython 2.5 beta out
> Being developed at
– http://www.jython.org/Project/
• Currently WAR deployment approach
> Using Django-Jython project
– http://django-jython.googlecode.com/
• Native Django application deployment in works
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PHP
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PHP
• Quercus (Caucho)
> Open Source (GPL) PHP 5 implementation in Java
> WAR packaging
> WordPress, MediaWiki, phpBB, Joomla
• PHP/Java Bridge
> Open Source (LGPL)
> XML based network protocol for native PHP
> Faster, easier than JNI
> Java native threads used for concurrent requests
> PHP and JSP session sharing
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Scala on Lift
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Scala on Lift
• Lifts apps packaged as WAR
> asadmin deploy liftApp.war
• For details on developing and deploying Lift
applications see
> http://wiki.glassfish.java.net/Wiki.jsp?page=GettingStartedWithLiftOnGlassFish
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References
• GlassFish
> https://glassfish.dev.java.net
• GlassFish Scripting Project
> https://glassfish-scripting.dev.java.net
• Scripting Wiki
> http://wiki.glassfish.java.net/Wiki.jsp?page=Scripting
• Mailing List
> webtier@glassfish.dev.java.net
• IssueTracker
> https://glassfish.dev.java.net/servlets/ProjectIssues
• TheAquarium
> http://blogs.sun.com/theaquarium
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Q&A
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