Module: Frenetic::BrieflyMemoizable::ClassMethods

Defined in:
lib/frenetic/briefly_memoizable.rb

Instance Method Summary collapse

Instance Method Details

#briefly_memoize(symbol) ⇒ Object 



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# File 'lib/frenetic/briefly_memoizable.rb', line 11

def briefly_memoize(symbol)
  original_method = "_unmemoized_#{symbol}".to_sym
  memoized_ivar = "@#{symbol}"
  age_ivar = "@#{symbol}_age"

  # rubocop:disable Metrics/LineLength
  class_eval <<-CODE
    if method_defined?(:#{original_method})                                  # if method_defined?(:_unmemoized_mime_type)
      fail "Already memoized #{symbol}"                                      #   fail "Already memoized mime_type"
    end                                                                      # end
    alias #{original_method} #{symbol}                                       # alias _unmemoized_mime_type mime_type

    def #{symbol}(*args)                                                     # def mime_type(*args)
      #{memoized_ivar} = nil if #{age_ivar} && Time.now > #{age_ivar}        #   @mime_type = nil if @mime_type_age && Time.now > @mime_type_age
      #{memoized_ivar} ||= #{original_method}(*args)                         #   @mime_type ||= _unmemoized_mime_type(*args)
    end                                                                      # end

    def reload_#{symbol}!                                                    # def reload_mime_type!
      #{memoized_ivar} = nil                                                 #   @mime_type = nil
    end                                                                      # end
  CODE
  # rubocop:enable Metrics/LineLength
end