#Gemfile
gem 'delayed_job_active_record'  

#config/application.rb
config.active_job.queue_adapter = :delayed_job
config.eager_load_paths << Rails.root.join('app/jobs')

class OrderAddJob < ApplicationJob
    queue_as :urgent
    #queue_as :default
    #queue_as :low_priority

    def perform(order, customer, user)
        
    end
end

class OrdersController < ApplicationController
def create
    OrderAddJob.set(wait: 5.seconds).perform_later(@order, customer, current_user)
    OrderAddJob.set(wait_until: Date.tomorrow.noon).perform_later(@order, customer, current_user)
end

#config/initializers/delayed_job_config.rb
Delayed::Worker.logger = Logger.new(File.join(Rails.root, 'log', 'delayed_job.log'))

#Gemfile
gem 'daemons'

#Procfile
worker: rake jobs:work