genericmanager

type MultiClusterInformerManager interface {
	// ForCluster builds an informer manager for a specific cluster.
	ForCluster(cluster string, client dynamic.Interface, defaultResync time.Duration) SingleClusterInformerManager

	// GetSingleClusterManager gets the informer manager for a specific cluster.
	// The informer manager should be created before, otherwise, nil will be returned.
	GetSingleClusterManager(cluster string) SingleClusterInformerManager

	// IsManagerExist checks if the informer manager for the cluster already created.
	IsManagerExist(cluster string) bool

	// Start will run all informers for a specific cluster.
	// Should call after 'ForCluster', otherwise no-ops.
	Start(cluster string)

	// Stop will stop all informers for a specific cluster, and delete the cluster from informer managers.
	Stop(cluster string)

	// WaitForCacheSync waits for all caches to populate.
	// Should call after 'ForCluster', otherwise no-ops.
	WaitForCacheSync(cluster string) map[schema.GroupVersionResource]bool

	// WaitForCacheSyncWithTimeout waits for all caches to populate with a definitive timeout.
	// Should call after 'ForCluster', otherwise no-ops.
	WaitForCacheSyncWithTimeout(cluster string, cacheSyncTimeout time.Duration) map[schema.GroupVersionResource]bool
}

type SingleClusterInformerManager interface {
	// ForResource builds a dynamic shared informer for 'resource' then set event handler.
	// If the informer already exist, the event handler will be appended to the informer.
	// The handler should not be nil.
	ForResource(resource schema.GroupVersionResource, handler cache.ResourceEventHandler)

	// IsInformerSynced checks if the resource's informer is synced.
	// An informer is synced means:
	// - The informer has been created(by method 'ForResource' or 'Lister').
	// - The informer has started(by method 'Start').
	// - The informer's cache has been synced.
	IsInformerSynced(resource schema.GroupVersionResource) bool

	// IsHandlerExist checks if handler already added to the informer that watches the 'resource'.
	IsHandlerExist(resource schema.GroupVersionResource, handler cache.ResourceEventHandler) bool

	// 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

	// 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 single cluster informers of a cluster. Once it is stopped, it will be not able
	// to Start again.
	Stop()

	// WaitForCacheSync waits for all caches to populate.
	WaitForCacheSync() map[schema.GroupVersionResource]bool

	// WaitForCacheSyncWithTimeout waits for all caches to populate with a definitive timeout.
	WaitForCacheSyncWithTimeout(cacheSyncTimeout time.Duration) map[schema.GroupVersionResource]bool

	// Context returns the single cluster context.
	Context() context.Context

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