method_logger.rb

    module MethodLogger
      def self.included(base)
        methods = base.instance_methods(false) + base.private_instance_methods(false)
        base.class_eval do
          methods.each do |method_name|
            original_method = instance_method(method_name)            
            Rails.logger.info "creating override method for #{method_name} #{base}"
            define_method(method_name) do |*args, &block|
              Rails.logger.info "-> #{base}##{method_name}(#{args.inspect})"
              Rails.logger.info "-- #{block}"
              return_value = original_method.bind(self).call(*args, &block)
              Rails.logger.info "<- #{base}##{method_name} #=> #{return_value.inspect}"
              return_value
            end
          end
        end
      end
    end