logger (ruby)

apache 项目中的与log4j对应的ruby版为－＞ log4r
ruby 代码

   log = Logger.new(STDOUT)  log.level = Logger::WARN  log.debug("Created logger")  log.info("Program started")  log.warn("Nothing to do!")  begin    File.each_line(path) do |line|      unless line =~ /^(\w+) = (.*)$/        log.error("Line in wrong format: #{line}")      end    end  rescue => err    log.fatal("Caught exception; exiting")    log.fatal(err)  end