public BdbBrokerConfEntity setNumTopicStores(int numTopicStores) {
        this.attributes =
                TStringUtils.setAttrValToAttributes(this.attributes,
                        TStoreConstants.TOKEN_STORE_NUM,
                        String.valueOf(numTopicStores));
        return this;
    }
Get broker config string

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