Sample of Java Quartz inside JRuby on Rails

quartz.rb

# config/initializers/quartz.rb

require 'commons-collections-3.2.1.jar'
require 'commons-logging.jar'
require 'log4j.jar'
require 'quartz-1.6.4.jar'

require 'quartz'

org.apache.log4j.BasicConfigurator.configure

class CronScheduler
  include Quartz::Scheduler
  schedule(:grabber, :every=>60.seconds) do
    info "Grabbing..."
    Document.grab
  end
end

CronScheduler.instance.run