Sample resque.rake for workers on multiple servers

Resque.rake

require 'resque/tasks'
require 'resque_scheduler'
require 'resque_scheduler/tasks'
require 'resque_scheduler/server'

rails_root = ENV['RAILS_ROOT'] || File.dirname(__FILE__) + '/../..'
rails_env = ENV['RAILS_ENV'] || 'development'

resque_config = YAML.load_file(rails_root + '/config/resque.yml') #contains Redis's location on the network for different Rails environments
Resque.redis = resque_config[rails_env]

namespace :resque do
  task :setup => :environment do      
    Resque.before_fork do |job|
      # we need $extractor to be built before the following four jobs can be run, but, since it's expensive,
      # we only want to rebuild it if necessary, and not on every fork.
      if [BaseJob, PhotostreamJob, RegularPhotoJob, ReanalyzeJob].include? job.payload_class 
        if ! $extractor
          puts "Must rebuild extractor in parent"
          $extractor = Extractor.new
          puts "Extractor built in parent"
        end
      end
    end
    Resque.schedule = YAML.load_file(File.expand_path('../resque_schedule.yml',__FILE__))
  end
end