JRuby & RailsJumping tracks with minimal pain

Contents

• JRuby & Rails

• Why?

• Things to Watch

• Databases

• Servers & Deployment

• Beyond Rails with JRuby

Why Rails on JRuby?

Why?

• Easier deployments

• Potential scalability

Warning Signs?

Danger!

• Relying upon Native Code

• Gems

• Standard Library

Databases

• Pure Ruby Drivers

• Slow(er)

• Most Compatible

ActiveRecord-JDBC

• JDBC: Java’s Native Database Protocol

• More Databases Supported

• Faster

• Odd compatibility issues?

Database Config Demo

Deployment

• Deploying to Mongrels/etc. = JRuby 1.0

• Deploying to Java = Preferred JRuby 1.1+

Serving from Java

• Packaging your application

• Getting it to the server

Packaging with Warbler

• Packaging your Rails app for Java Servers

• Resultant artefact is a deployable Application

Warbler Config Demo

Java on Development

• script/server still works

• jetty_rails

• glassfish_rails

Moving to Production

• Java 5 (or higher) is the key!

Beyond Rails?

• Calling Rails from a Java webapp?

• Use Merb? Camping?

Beyond Rails?

• Rack support!

Links

• JRuby

• http://www.jruby.org

• http://wiki.jruby.org

• JRuby Inside: http://www.jrubyinside.com

• Nick Sieger: http://blog.nicksieger.com/