code: public NodeStatus newestDefinition(String application) throws ApplicationUndefinedException {
          if (Objects.equals(application, EnvUtil.getApplication()))
              return LocalNodeManager.singleton.getFullStatus();
          if (ApplicationDiscovery.singleton != null) {
              NodeStatus status = ApplicationDiscovery.singleton.newestDefinition(application);
              if (status != null) return status;
          }
          throw new ApplicationUndefinedException(application);
      }
docs: 获取application定义
  
  @param application application名称
  @throws ApplicationUndefinedException application未定义