Restart resque workers on capistrano deploy

deploy.rb

desc "Kill resque workers"
  task :kill_processes, :roles => :god, :on_no_matching_servers => :continue do
      run "cd #{deploy_to}/current && rake resque:restart_workers RAILS_ENV=#{rails_env}" do |ch, stream, data|
        puts data
      end
  end
end

resque.rake

namespace :resque do
  task :restart_workers => :environment do
    pids = Array.new
    Resque.workers.each do |worker|
      pids << worker.to_s.split(/:/).second
    end
    if pids.size > 0
      system("kill -QUIT #{pids.join(' ')}")
    end
  end
end