informer

type APIResourceMeta struct {
	// GroupVersionKind is the gvk of the resource.
	GroupVersionKind schema.GroupVersionKind

	// GroupVersionResource is the gvr of the resource.
	GroupVersionResource schema.GroupVersionResource

	// IsClusterScoped indicates if the resource is a cluster scoped resource.
	IsClusterScoped bool
	// contains filtered or unexported fields
}

type Manager interface {
	// AddDynamicResources builds a dynamicInformer for each resource in the resources list with the event handler.
	// A resource is dynamic if its definition can be created/deleted/updated during runtime.
	// Normally, it is a custom resource that is installed by users. The handler should not be nil.
	AddDynamicResources(resources []APIResourceMeta, handler cache.ResourceEventHandler, listComplete bool)

	// AddStaticResource creates a dynamicInformer for the static 'resource' and set its event handler.
	// A resource is static if its definition is pre-determined and immutable during runtime.
	// Normally, it is a resource that is pre-installed by the system.
	// This function can only be called once for each type of static resource during the initialization of the informer manager.
	AddStaticResource(resource APIResourceMeta, handler cache.ResourceEventHandler)

	// IsInformerSynced checks if the resource's informer is synced.
	IsInformerSynced(resource schema.GroupVersionResource) bool

	// Start will run all informers, the informers will keep running until the channel closed.
	// It is intended to be called after create new informer(s), and it's safe to call multi times.
	Start()

	// Stop stops all informers of in this manager. Once it is stopped, it will be not able to Start again.
	Stop()

	// Lister returns a generic lister used to get 'resource' from informer's store.
	// The informer for 'resource' will be created if not exist, but without any event handler.
	Lister(resource schema.GroupVersionResource) cache.GenericLister

	// GetNameSpaceScopedResources returns the list of namespace scoped resources we are watching.
	GetNameSpaceScopedResources() []schema.GroupVersionResource

	// IsClusterScopedResources returns if a resource is cluster scoped.
	IsClusterScopedResources(resource schema.GroupVersionKind) bool

	// WaitForCacheSync waits for the informer cache to populate.
	WaitForCacheSync()

	// GetClient returns the dynamic dynamicClient.
	GetClient() dynamic.Interface
}