func NewEventQueueForStore(keyFunc cache.KeyFunc, knownObjects cache.KeyListerGetter) *EventQueue {
	return &EventQueue{
		DeltaFIFO: cache.NewDeltaFIFO(
			keyFunc,
			cache.DeltaCompressorFunc(func(d cache.Deltas) cache.Deltas {
				return deltaCompressor(d, keyFunc)
			}),
			knownObjects),
	}
}

func NewEventQueue(keyFunc cache.KeyFunc) *EventQueue {
	knownObjects := cache.NewStore(keyFunc)
	return &EventQueue{
		DeltaFIFO: cache.NewDeltaFIFO(
			keyFunc,
			cache.DeltaCompressorFunc(func(d cache.Deltas) cache.Deltas {
				return deltaCompressor(d, keyFunc)
			}),
			knownObjects),
		knownObjects: knownObjects,
	}
}

// Run starts a background goroutine that watches for changes to services that
// have (or had) LoadBalancers=true and ensures that they have
// load balancers created and deleted appropriately.
// serviceSyncPeriod controls how often we check the cluster's services to
// ensure that the correct load balancers exist.
// nodeSyncPeriod controls how often we check the cluster's nodes to determine
// if load balancers need to be updated to point to a new set.
//
// It's an error to call Run() more than once for a given ServiceController
// object.
func (s *ServiceController) Run(serviceSyncPeriod, nodeSyncPeriod time.Duration) error {
	if err := s.init(); err != nil {
		return err
	}

	// We have to make this check because the ListWatch that we use in
	// WatchServices requires Client functions that aren't in the interface
	// for some reason.
	if _, ok := s.kubeClient.(*clientset.Clientset); !ok {
		return fmt.Errorf("ServiceController only works with real Client objects, but was passed something else satisfying the clientset.Interface.")
	}

	// Get the currently existing set of services and then all future creates
	// and updates of services.
	// A delta compressor is needed for the DeltaFIFO queue because we only ever
	// care about the most recent state.
	serviceQueue := cache.NewDeltaFIFO(
		cache.MetaNamespaceKeyFunc,
		cache.DeltaCompressorFunc(func(d cache.Deltas) cache.Deltas {
			if len(d) == 0 {
				return d
			}
			return cache.Deltas{*d.Newest()}
		}),
		s.cache,
	)
	lw := cache.NewListWatchFromClient(s.kubeClient.(*clientset.Clientset).CoreClient, "services", api.NamespaceAll, fields.Everything())
	cache.NewReflector(lw, &api.Service{}, serviceQueue, serviceSyncPeriod).Run()
	for i := 0; i < workerGoroutines; i++ {
		go s.watchServices(serviceQueue)
	}

	nodeLW := cache.NewListWatchFromClient(s.kubeClient.(*clientset.Clientset).CoreClient, "nodes", api.NamespaceAll, fields.Everything())
	cache.NewReflector(nodeLW, &api.Node{}, s.nodeLister.Store, 0).Run()
	go s.nodeSyncLoop(nodeSyncPeriod)
	return nil
}