import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Serializes execution of tasks, somewhat like an "asynchronous {@code synchronized} block." Each
 * {@linkplain #submit enqueued} callable will not be submitted to its associated executor until the
 * previous callable has returned -- and, if the previous callable was an {@link AsyncCallable}, not

Various components described in Config Ingestion can trigger a Config Update. These are batched up ("debounced"), to avoid excessive activity when many changes happen in succession, and eventually enqueued in the Push Queue.

 *  Fix: Skip early hints (status code 103) responses.
 *  Fix: Don't log sensitive headers in `Request.toString()`.
 *  Fix: Don't crash when the dispatcher's `ExecutorService` is shutdown with many
    calls still enqueued.
 *  Upgrade: [GraalVM 22][graalvm_22].
 *  Upgrade: [Kotlin 1.7.10][kotlin_1_7_10].


## Version 5.0.0-alpha.10

_2022-06-26_

		obj = unknown.Obj
	}
	objName, err := controller.KeyFunc(obj)
	if err != nil {
		logger.Error(err, "Failed to get key from object")
		return
	}
	logger.V(5).Info("Enqueued for sync", "objName", objName)
	queue.Add(objName)
}

func (ctrl *PersistentVolumeController) storeVolumeUpdate(logger klog.Logger, volume interface{}) (bool, error) {

	// initialization doesn't have dependencies that will block, there is no need to add any timeout
	// here. Prior to this explicit wait, we were implicitly waiting by receive() not sending to
	// reqChannel and the connection not being enqueued for pushes to pushChannel until the
	// initialization is complete.
	<-con.InitializedCh()

	for {
		// Go select{} statements are not ordered; the same channel can be chosen many times.

        this.dependenciesMayChange = component.getModule().isVirtualPlatform();
    }

    // the enqueue and dequeue methods are used for performance reasons
    // in order to avoid tracking the set of enqueued nodes
    boolean enqueue() {
        if (queued) {
            return false;
        }
        queued = true;
        return true;
    }

    NodeState dequeue() {
        queued = false;

		// "closer" to kubelet (from the deployment to the replica set controller).
		if !podutil.IsPodReady(oldPod) && podutil.IsPodReady(curPod) && rs.Spec.MinReadySeconds > 0 {
			logger.V(2).Info("pod will be enqueued after a while for availability check", "duration", rs.Spec.MinReadySeconds, "kind", rsc.Kind, "pod", klog.KObj(oldPod))
			// Add a second to avoid milliseconds skew in AddAfter.

// If it returns an error, we'll take the returned QueueingHint as `Queue` at the caller whatever we returned here so that
// we can prevent the Pod from being stuck in the unschedulable pod pool.
//
// - `pod`: the Pod to be enqueued, which is rejected by this plugin in the past.
// - `oldObj` `newObj`: the object involved in that event.
//   - For example, the given event is "Node deleted", the `oldObj` will be that deleted Node.

		},
	})
}

// addDependentToOwners adds n to owners' dependents list. If the owner does not
// exist in the gb.uidToNode yet, a "virtual" node will be created to represent
// the owner. The "virtual" node will be enqueued to the attemptToDelete, so that
// attemptToDeleteItem() will verify if the owner exists according to the API server.
func (gb *GraphBuilder) addDependentToOwners(logger klog.Logger, n *node, owners []metav1.OwnerReference) {

	enqueue = func(m module.Version, pruning modPruning) {
		if m.Version == "none" {
			return
		}

		if _, dup := loading.LoadOrStore(dedupKey{m, pruning}, nil); dup {
			// m has already been enqueued for loading. Since unpruned loading may
			// follow cycles in the requirement graph, we need to return early
			// to avoid making the load queue infinitely long.
			return
		}

		loadQueue.Add(func() {