foodsoft/lib/tasks/resque.rake

require 'resque/tasks'

def run_worker(queue, count = 1)
  puts "Starting #{count} worker(s) with QUEUE: #{queue}"
  ops = { pgroup: true, err: ['log/resque_worker_foodsoft_notifier.log', 'a'],
          out: ['log/resque_worker_foodsoft_notifier.log', 'a'] }
  env_vars = { 'QUEUE' => queue.to_s, 'PIDFILE' => 'tmp/pids/resque_worker_foodsoft_notifier.pid' }
  count.times do
    ## Using Kernel.spawn and Process.detach because regular system() call would
    ## cause the processes to quit when capistrano finishes
    pid = spawn(env_vars, 'bundle exec rake resque:work', ops)
    Process.detach(pid)
  end
end

namespace :resque do
  task setup: :environment

  desc 'Restart running workers'
  task :restart_workers do
    Rake::Task['resque:stop_workers'].invoke
    Rake::Task['resque:start_workers'].invoke
  end

  desc 'Quit running workers'
  task :stop_workers do
    pids = File.read('tmp/pids/resque_worker_foodsoft_notifier.pid').split("\n")
    if pids.empty?
      puts 'No workers to kill'
    else
      syscmd = "kill -s QUIT #{pids.join(' ')}"
      puts "Running syscmd: #{syscmd}"
      system(syscmd)
    end
  end

  desc 'Start workers'
  task :start_workers do
    run_worker('foodsoft_notifier')
  end
end