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    db_adapters.cr state_machine.cr value_object.cr visitor.cr db_adapters.rb log_decorator.rb validation.rb value_object.rb visitor.rb

  • log_decorator.rb

  • ¶

    Using method_missing allows us to intercept any method call. Here we use that to decorate every method call to a given object.

    class LogDecorator

  def initialize(decorated)
    @decorated = decorated
  end

  def method_missing(method_name, *args)
    puts "~~> #{@decorated} received #{method_name} with (#{args.inspect})"
    @decorated.send(method_name, *args)
  end

end

str = LogDecorator.new("Hey ho let's go")
  • ¶

    This will print:

    ~~> Hey ho let's go received length with ([])
15

    puts str.length