01_workers.rb

module Workers
  class One
    include Sidekiq::Worker

    def perform
      Sidekiq.logger.info 'Workers::One'
      batch = Sidekiq::Batch.new
      batch.on(:success, Two)
      batch.jobs do
        Two.perform_async
      end
    end
  end

  class Two
    include Sidekiq::Worker

    def perform
      Sidekiq.logger.info 'Workers::Two'
      batch = Sidekiq::Batch.new
      batch.on(:success, self.class)
      batch.jobs do
        Three.perform_async
      end
    end

    def on_success(status, options)
      Sidekiq.logger.info "Workers::Two Success #{options} #{status.data}"
    end
  end

  class Three
    include Sidekiq::Worker

    def perform
      Sidekiq.logger.info 'Workers::Three'
      batch = Sidekiq::Batch.new
      batch.on(:complete, Four)
      batch.on(:success, Four)
      batch.jobs do
        Four.perform_async
      end
    end

    def on_success(status, options)
      Sidekiq.logger.info "Workers::Three Success #{options} #{status.data}"
    end
  end

  class Four
    include Sidekiq::Worker

    @@count = 0

    def perform
      @@count += 1
      raise 'First try fridays' if @@count <= 1

      Sidekiq.logger.info 'Workers::Four'
    end

    def on_complete(status, options)
      Sidekiq.logger.info "Workers::Four Complete #{options} #{status.data}"
    end

    def on_success(status, options)
      Sidekiq.logger.info "Workers::Four Success #{options} #{status.data}"
    end
  end

  class SomeClass
    def on_complete(status, options)
      Sidekiq.logger.info "Overall Complete #{options} #{status.data}"
    end

    def on_success(status, options)
      Sidekiq.logger.info "Overall Success #{options} #{status.data}"
    end
  end
end

02_script.rb

batch = Sidekiq::Batch.new
batch.on(:success, Workers::SomeClass, 'uid' => 3)
batch.on(:complete, Workers::SomeClass, 'uid' => 3)
batch.jobs do
  Workers::One.perform_async
end

puts "Overall bid #{batch.bid}"