public void setDftMemCacheMsgCntInK(final int memCacheMsgCntInK) {
        this.attributes =
                TStringUtils.setAttrValToAttributes(this.attributes,
                        TStoreConstants.TOKEN_MCACHE_MSG_CNT,
                        String.valueOf(memCacheMsgCntInK));
    }
Get broker config string

@return config string
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/master/bdbstore/bdbentitys/BdbBrokerConfEntity.java