code: public static Counter counter(String appid, Class<?> clazz, String... names) {
  		String className = getClassName(clazz);
  		return getCounter(App.isRoot(appid) ? SYSTEM_METRICS_NAME : appid, className, names);
  	}
docs: Creates a new counter for a particular class and method for a specific application.
  
  @param appid the application that invoked the request
  @param clazz the Class to be counted
  @param names one or more unique names to identify the counter - usually a method name
  @return a counter