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# File 'lib/memoizers/timed_memoizer.rb', line 4
def memoize(method_name, p={})
method_name = method_name.to_s
stripped_method_name = method_name.sub(/([!?])$/, '')
punctuation = $1
wordy_punctuation = (punctuation == '!' ? '_bang' : '_huh') if punctuation
ivar_name = "@#{stripped_method_name}#{wordy_punctuation}"
memoized_method_name = "#{stripped_method_name}_with_timed_memo#{punctuation}"
regular_method_name = "#{stripped_method_name}_without_memo#{punctuation}"
unless (instance_methods + private_instance_methods).include?(method_name)
raise NoMethodError, "The Method '#{method_name}' cannot be memoized because it doesn't exist in #{self}"
end
return if self.method_defined?(memoized_method_name)
self.class_eval "
@@refreshing_time = #{p[:refreshing_time] || 30}
def #{memoized_method_name}(*args)
if defined?(#{ivar_name}) and (Time.now - #{ivar_name}_tsample) < @@refreshing_time
#{ivar_name}
else
#{ivar_name}_tsample = Time.now
#{ivar_name} = #{regular_method_name}(*args)
end
end
alias_method :#{regular_method_name}, :#{method_name}
alias_method :#{method_name}, :#{memoized_method_name}
protected :#{method_name} if protected_instance_methods.include?('#{regular_method_name}')
private :#{method_name} if private_instance_methods.include?('#{regular_method_name}')
"
end
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