SpringCloudAlibaba nacos 客戶端往服務(wù)器中發(fā)生請求是在以下的包中
com.alibaba.nacos.client.config.impl.ClientWorker.ConfigRpcTransportClient#queryConfig

代碼如下：

@Override
        public ConfigResponse queryConfig(String dataId, String group, String tenant, long readTimeouts, boolean notify)
                throws NacosException {
            ConfigQueryRequest request = ConfigQueryRequest.build(dataId, group, tenant);
            request.putHeader(NOTIFY_HEADER, String.valueOf(notify));
            RpcClient rpcClient = getOneRunningClient();
            if (notify) {
                CacheData cacheData = cacheMap.get().get(GroupKey.getKeyTenant(dataId, group, tenant));
                if (cacheData != null) {
                    rpcClient = ensureRpcClient(String.valueOf(cacheData.getTaskId()));
                }
            }
            ConfigQueryResponse response = (ConfigQueryResponse) requestProxy(rpcClient, request, readTimeouts);
            
            ConfigResponse configResponse = new ConfigResponse();
            if (response.isSuccess()) {
                LocalConfigInfoProcessor.saveSnapshot(this.getName(), dataId, group, tenant, response.getContent());
                configResponse.setContent(response.getContent());
                String configType;
                if (StringUtils.isNotBlank(response.getContentType())) {
                    configType = response.getContentType();
                } else {
                    configType = ConfigType.TEXT.getType();
                }
                configResponse.setConfigType(configType);
                String encryptedDataKey = response.getEncryptedDataKey();
                LocalEncryptedDataKeyProcessor
                        .saveEncryptDataKeySnapshot(agent.getName(), dataId, group, tenant, encryptedDataKey);
                configResponse.setEncryptedDataKey(encryptedDataKey);
                return configResponse;
            } else if (response.getErrorCode() == ConfigQueryResponse.CONFIG_NOT_FOUND) {
                LocalConfigInfoProcessor.saveSnapshot(this.getName(), dataId, group, tenant, null);
                LocalEncryptedDataKeyProcessor.saveEncryptDataKeySnapshot(agent.getName(), dataId, group, tenant, null);
                return configResponse;
            } else if (response.getErrorCode() == ConfigQueryResponse.CONFIG_QUERY_CONFLICT) {
                LOGGER.error(
                        "[{}] [sub-server-error] get server config being modified concurrently, dataId={}, group={}, "
                                + "tenant={}", this.getName(), dataId, group, tenant);
                throw new NacosException(NacosException.CONFLICT,
                        "data being modified, dataId=" + dataId + ",group=" + group + ",tenant=" + tenant);
            } else {
                LOGGER.error("[{}] [sub-server-error]  dataId={}, group={}, tenant={}, code={}", this.getName(), dataId,
                        group, tenant, response);
                throw new NacosException(response.getErrorCode(),
                        "http error, code=" + response.getErrorCode() + ",msg=" + response.getMessage() + ",dataId="
                                + dataId + ",group=" + group + ",tenant=" + tenant);
                
            }
        }

nacos 會有一個定時任務(wù)去加載dataId 的md5 的值，如果發(fā)生變化會去更新拉取變化文件的信息

注意nacos的 namespace 只能使用uuid，不能使用名字。