public static void endWithSlowLog(Logger logger, String key, long threshold) {
		slowLog(logger, key, end(key), threshold);
	}
public static void endWithSlowLog ( Logger logger , String key , long threshold ) { slowLog ( logger , key , end ( key ) , threshold ) ; }
记录结束时间并当处理时间超过预定的阈值时发出警告信息，最后清除
@param logger
@param key
@param threshold 阈值（单位：ms）