Appendix A -- Registering a Service

• Registering a service (an object) just records the creation block in a services hash.
  • The name of the service becomes the key of the hash.

    def register(name, &block)
      if @services[name]
        fail DuplicateServiceError,
          "Duplicate Service Name '#{name}'"
      end
      @services[name] = block
    end