Method Logger Ruby

method_logger

require 'active_support'

# To use this make sure you add `include MethodLogger` at the END of your class definition
# Otherwise the methods you want aliased are not declared yet.

module MethodLogger
  
  def self.logger
    @@logger ||= Logger.new("#{Rails.root}/log/method_logger.log")
  end

  def self.included(base)
    methods_to_log = base.instance_methods(false) - methods
    logger.info "Logging methods: #{methods_to_log}"
    base.class_eval do
      methods_to_log.each do |method_name|
        define_method("#{method_name}_with_logging".to_sym) do |*args, &block|
          logger.info "#{base}##{method_name} called with (#{args.inspect[0..100]})"
          result = send("#{method_name}_without_logging".to_sym, *args, &block)
          logger.info "=> #{result.inspect[0..100]}"
          result
        end
        alias_method_chain(method_name.to_sym, :logging)
      end
    end
  end

end