Method: Multiton::New.append_features

Defined in:
lib/carat/multiton.rb

.append_features(klass) ⇒ Object 



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# File 'lib/carat/multiton.rb', line 107

def self.append_features(klass)
  def klass.new(*args, &block)
    # if the class defined 'multiton_id' we use this as the key
    # otherwise we simply use the argument list.
    k = (respond_to?(MULTITON_ID_HOOK) ? send(MULTITON_ID_HOOK, *args, &block) : args)
    unless (obj = (POOLS[self] ||= {})[k])
      begin
        critical = Thread.critical
        Thread.critical = true
        if self.respond_to?(MULTITON_NEW_HOOK)
          obj = (POOLS[self][k] = self.send(MULTITON_NEW_HOOK, *args, &block))
        else
          obj = super
        end
      ensure
        Thread.critical = critical # restore state
      end
    end
    return obj
  end
end