rails3 logging filter

gistfile1.rb

# coding: utf-8

module Filters
  class TraceLogFilter
    def initialize(logger = nil)
      unless logger
        @logger = Rails.logger
      else
        @logger = logger
      end
    end

    def filter(controller, &action)
      timer = Time.now
      #TODO trace log
      @logger.info("BEGIN " << format(controller))
      yield
      elapsed_time = Time.now - timer
      @logger.info("END   " << format(controller) << " #{controller.response.status}")
    end

    def format(controller)
      "[#{$$}] #{controller.request.session_options[:id]} [#{controller.params[:controller]}-#{controller.params[:action]}]"
    end
  end

end