apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/util/InstanceConfigAuditUtil.java/InstanceConfigAuditUtil/InstanceConfigAuditModel
class InstanceConfigAuditUtil:    public InstanceConfigAuditModel(String appId, String clusterName, String dataCenter, String
        clientIp, String configAppId, String configClusterName, String configNamespace, String
                                        releaseKey) {
      this.offerTime = new Date();
      this.appId = appId;
      this.clusterName = clusterName;
      this.dataCenter = Strings.isNullOrEmpty(dataCenter) ? "" : dataCenter;
      this.ip = clientIp;
      this.configAppId = configAppId;
      this.configClusterName = configClusterName;
      this.configNamespace = configNamespace;
      this.releaseKey = releaseKey;
    }