public static void getValue(StringBuilder strBuff) {
        getStatsValue(switchableSets[getIndex()], false, strBuff);
    }
BrokerSrvStatsHolder, statistic Broker metrics information for RPC services

The metrics are placed independently or in switchableSets according to
whether switchable statistics are allowed, and the value of metrics is changed
via the corresponding metric API.
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/broker/stats/BrokerSrvStatsHolder.java