Why clusterpedia save data within informer, no use save data within event handler?

[yiya1989]

As bellow, clusterpedia will run a gorutine for every resource, and will sync and save data to storage in synchro.

I'm confused about why we not use dynamic go-client to watch these resource, and then sync and save data to storage in the event handler callback?

Thanks!

func (s *ClusterSynchro) refreshSyncResources() {
	syncResources := s.syncResources.Load().([]clusterv1alpha2.ClusterGroupResources)

	groupResourceStatus, storageResourceSyncConfigs := s.resourceNegotiator.NegotiateSyncResources(syncResources)

	storageGVRToSyncGVRs := groupResourceStatus.GetStorageGVRToSyncGVRs()

	func() {
		for storageGVR, config := range storageResourceSyncConfigs {

			resourceStorage, err := s.storage.NewResourceStorage(config.storageConfig)
			synchro := newResourceSynchro(s.name,
				ResourceSynchroConfig{
					GroupVersionResource: config.syncResource,
					Kind:                 config.kind,
					ListerWatcher:        s.listerWatcherFactory.ForResource(metav1.NamespaceAll, config.syncResource),
					ObjectConvertor:      config.convertor,
					ResourceStorage:      resourceStorage,
					MetricsStore:         metricsStore,
					ResourceVersions:     rvs,
					PageSizeForInformer:  s.syncConfig.PageSizeForResourceSync,
				},
			)

			if s.handlerStopCh != nil {
				select {
				case <-s.handlerStopCh:
				default:
					go synchro.Start(s.handlerStopCh)
				}
			}
		}
	}()
...
}