webhookutil "k8s.io/apiserver/pkg/util/webhook"
	"k8s.io/client-go/informers"
	clientset "k8s.io/client-go/kubernetes"
)

// Webhook is an abstract admission plugin with all the infrastructure to define Admit or Validate on-top.
type Webhook struct {
	*admission.Handler

	sourceFactory sourceFactory

	hookSource       Source
	clientManager    *webhookutil.ClientManager
	namespaceMatcher *namespace.Matcher

	return &kube.AdmissionResponse{Result: &metav1.Status{Message: err.Error()}}
}

type admitFunc func(*kube.AdmissionRequest) *kube.AdmissionResponse

func serve(w http.ResponseWriter, r *http.Request, admit admitFunc) {
	var body []byte
	if r.Body != nil {
		if data, err := kube.HTTPConfigReader(r); err == nil {
			body = data
		} else {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

				assert.NoError(t, manager.ShutdownStatus(), "expected that manager does not return error since shutdown is not active")
				assert.Equal(t, manager.Admit(nil).Admit, true)

				// Send fake shutdown event
				select {
				case fakeShutdownChan <- true:
				case <-time.After(1 * time.Second):
					t.Fatal()
				}

				// Wait for all the pods to be killed

	if err != nil {
		t.Errorf("ResourceQuota should admit all deletes: %v", err)
	}
}

// TestAdmissionIgnoresSubresources verifies that the admission controller ignores subresources
// It verifies that creation of a pod that would have exceeded quota is properly failed

		return fmt.Errorf("missing client")
	}
	if s.serviceAccountLister == nil {
		return fmt.Errorf("missing serviceAccountLister")
	}
	return nil
}

// Admit verifies if the pod should be admitted
func (s *Plugin) Admit(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) (err error) {
	if shouldIgnore(a) {
		return nil
	}
	if a.GetOperation() != admission.Create {

	attrs.OtherPods = kl.GetActivePods()

	for _, handler := range kl.softAdmitHandlers {
		if result := handler.Admit(attrs); !result.Admit {
			return result
		}
	}

	return lifecycle.PodAdmitResult{Admit: true}
}

// syncLoop is the main loop for processing changes. It watches for changes from

La mayoría de los framework populares de Python existentes (incluidos Flask y Django) se crearon antes de que existieran las nuevas funciones asíncronas en Python. Por lo tanto, las formas en que pueden implementarse admiten la ejecución paralela y una forma más antigua de ejecución asíncrona que no es tan potente como la actual.

	return ValidateStructuralWithOptions(fldPath, s, ValidationOptions{
		// This would widen the schema for CRD if set to true, so first few releases will still
		// not admit any. But it can still be used by libraries and
		// declarative validation for native types
		AllowNestedAdditionalProperties:                   false,
		AllowNestedXValidations:                           false,

// if the hook cannot be completed. The function may NOT transform the provided
// object.
type ValidateObjectFunc func(ctx context.Context, obj runtime.Object) error

// ValidateAllObjectFunc is a "admit everything" instance of ValidateObjectFunc.
func ValidateAllObjectFunc(ctx context.Context, obj runtime.Object) error {
	return nil
}

		}
		c.podsGetter = a.podsGetter
		c.nodesGetter = a.nodesGetter
		err := c.Admit(context.TODO(), a.attributes, nil)
		if (err == nil) != (len(a.err) == 0) {
			t.Errorf("nodePlugin.Admit() error = %v, expected %v", err, a.err)
			return
		}
		if len(a.err) > 0 && !strings.Contains(err.Error(), a.err) {
			t.Errorf("nodePlugin.Admit() error = %v, expected %v", err, a.err)
		}
	})
}