Ruby의 학급 방법을 의뢰할 때 SingleForwardable를 사용합니다

결론

require 'forwardable'

class Implementation
  def self.service
    puts "serviced!"
  end
end

module Facade
  extend SingleForwardable
  def_delegator :Implementation, :service
end

Facade.service # => serviced!

구체적 예

module BugReport
  extend SingleForwardable
  def_delegator :Bugsnag, :notify
end

BugReport.notify # Bugsnag.notify が実行される

module BugReport
  class << self
    delegate :notify, to: :Bugsnag
  end
end

BugReport.notify # Bugsnag.notify が実行される