Rails on JRuby

JRuby & Rails Jumping 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/

by Rob C