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You can use JRuby with Ruby on Rails. JRuby gives Rails the power and functionality of the Java Platform, providing it with:

• Excellent garbage collection for endless uptimes
• Hotspot profiled dynamic optimizations for great performance
• Access to the Java ecosphere for additional technology options
• Deployment to Java application servers for ubiquity

Table of Contents Getting Started Deployment This page is outdated, more up-to-date info on our Servers page War File Deployment Glassfish v3 Deployment Traditional Rails Deployment Miscellaneous Rails Topics

Get started with these tutorials:

• Using Puma, Rails 4 and JRuby on Heroku - Simple well explained tutorial (Up to date-ish. Written on December 4, 2014).
• Outdated(404): Rails3 application with Jruby
• Outdated(JRuby Version 1.3.1): Deploying a Rails application in Tomcat with JRuby: A concise tutorial
• Empty Wiki: JRuby on Rails with Spring - zero to .war file with Spring and Maven.
• Outdated (Page says 'This book is obsolete') "Porting" the Depot Application To Jruby, Parts 1 and 2: These tutorials show you how to make the Depot application from "Agile Web Development with Rails, Third Edition" work with Jruby.

If you don't use a traditional Ruby application server like Mongrel, you can use a Java application server. To deploy to a Java app server, you can use the tool Warbler to bundle your Rails application in a Java Web Application Archive (.war file). (Warbler is a minimal, flexible, Ruby-like way to create a .war file.) Once you have a .war file, you can deploy to any Java app server using its war deployment mechanism.

Some links to information on various Java appllication servers:

• Tomcat
• Jetty
• WebSphere
• Oracle OC4J
• Oracle WebLogic
• JBoss

The Glassfish gem by Vivek Pandey enables you to easily deploy a JRuby on Rails application to the Glassfish v3 modularized Java application server. The Glassfish gem wraps the essential technologies in 3 MB and allows you to run your application using a traditional approach, as if you were running Mongrel, Rack, and so on.

• PUMA (works with MRI as well as JRuby)
• Trinidad (based on Tomcat)
• TorqueBox (based on JBoss)
• Passenger
• Mongrel Web Server entry on Wikipedia
• Swiftiply with Mongrel
• WEBrick website
• WEBrick entry on Wikipedia
• Gnome's Guide to WEBrick

• Blog entry on setting up JNDI
• Write Portlets using Rails
• JRuby Services in Rails