$Master

1、

SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();
        DataSource routedDataSource;
        if (SqlCommandType.SELECT == sqlCommandType){
            if(StringUtils.endsWith(mappedStatement.getId(), SUFFIX_USE_MASTER)) {
                routedDataSource = writeDataSource;
                logger.debug("Force use writeDataSource for {}: {}", sqlCommandType, routedDataSource);
            } else {
                routedDataSource = loadBalancer.select(readDataSources, mappedStatement, parameter);
                logger.debug("Select readDataSource for {}: {}", sqlCommandType, routedDataSource);
            }
        } else {
            routedDataSource = writeDataSource;
            logger.debug("Select writeDataSource for {}: {}", sqlCommandType, routedDataSource);
        }

/**
     * 获取时间戳
     * 
     * @param userId
     * @return
     */
    GuizuExpStamp getByUserId$Master(@Param("userId") int userId);


<!-- 获取贵族经验时间戳 -->
	<select id="getByUserId$Master" parameterType="int"
		resultMap="guizuExpStampResultMap">
		select *
		from
		t_guizu_exp_stamp
		where fk_user = #{userId}
	</select>

2、