Golang watch.Event類代碼示例

func (w *userProjectWatcher) GroupMembershipChanged(namespaceName string, users, groups sets.String) {
	if !w.visibleNamespaces.Has("*") && !w.visibleNamespaces.Has(namespaceName) {
		// this user is scoped to a level that shouldn't see this update
		return
	}

	hasAccess := users.Has(w.user.GetName()) || groups.HasAny(w.user.GetGroups()...)
	_, known := w.knownProjects[namespaceName]

	switch {
	// this means that we were removed from the project
	case !hasAccess && known:
		delete(w.knownProjects, namespaceName)

		select {
		case w.cacheIncoming <- watch.Event{
			Type:   watch.Deleted,
			Object: projectutil.ConvertNamespace(&kapi.Namespace{ObjectMeta: kapi.ObjectMeta{Name: namespaceName}}),
		}:
		default:
			// remove the watcher so that we wont' be notified again and block
			w.authCache.RemoveWatcher(w)
			w.cacheError <- errors.New("delete notification timeout")
		}

	case hasAccess:
		namespace, err := w.projectCache.GetNamespace(namespaceName)
		if err != nil {
			utilruntime.HandleError(err)
			return
		}

		event := watch.Event{
			Type:   watch.Added,
			Object: projectutil.ConvertNamespace(namespace),
		}

		// if we already have this in our list, then we're getting notified because the object changed
		if lastResourceVersion, known := w.knownProjects[namespaceName]; known {
			event.Type = watch.Modified

			// if we've already notified for this particular resourceVersion, there's no work to do
			if lastResourceVersion == namespace.ResourceVersion {
				return
			}
		}
		w.knownProjects[namespaceName] = namespace.ResourceVersion

		select {
		case w.cacheIncoming <- event:
		default:
			// remove the watcher so that we won't be notified again and block
			w.authCache.RemoveWatcher(w)
			w.cacheError <- errors.New("add notification timeout")
		}

	}

}

func (w *userProjectWatcher) GroupMembershipChanged(namespaceName string, latestUsers, lastestGroups, removedUsers, removedGroups, addedUsers, addedGroups sets.String) {
	hasAccess := latestUsers.Has(w.username) || lastestGroups.HasAny(w.groups...)
	removed := !hasAccess && (removedUsers.Has(w.username) || removedGroups.HasAny(w.groups...))

	switch {
	case removed:
		if _, known := w.knownProjects[namespaceName]; !known {
			return
		}
		delete(w.knownProjects, namespaceName)

		select {
		case w.cacheIncoming <- watch.Event{
			Type:   watch.Deleted,
			Object: projectutil.ConvertNamespace(&kapi.Namespace{ObjectMeta: kapi.ObjectMeta{Name: namespaceName}}),
		}:
		default:
			// remove the watcher so that we wont' be notified again and block
			w.authCache.RemoveWatcher(w)
			w.cacheError <- errors.New("delete notification timeout")
		}

	case hasAccess:
		namespace, err := w.projectCache.GetNamespace(namespaceName)
		if err != nil {
			utilruntime.HandleError(err)
			return
		}

		event := watch.Event{
			Type:   watch.Added,
			Object: projectutil.ConvertNamespace(namespace),
		}

		// if we already have this in our list, then we're getting notified because the object changed
		if lastResourceVersion, known := w.knownProjects[namespaceName]; known {
			event.Type = watch.Modified

			// if we've already notified for this particular resourceVersion, there's no work to do
			if lastResourceVersion == namespace.ResourceVersion {
				return
			}
		}
		w.knownProjects[namespaceName] = namespace.ResourceVersion

		select {
		case w.cacheIncoming <- event:
		default:
			// remove the watcher so that we won't be notified again and block
			w.authCache.RemoveWatcher(w)
			w.cacheError <- errors.New("add notification timeout")
		}

	}

}

func Convert_versioned_Event_to_watch_Event(in *Event, out *watch.Event, s conversion.Scope) error {
	out.Type = watch.EventType(in.Type)
	if in.Object.Object != nil {
		out.Object = in.Object.Object
	} else if in.Object.Raw != nil {
		// TODO: handle other fields on Unknown and detect type
		out.Object = &runtime.Unknown{
			Raw:         in.Object.Raw,
			ContentType: runtime.ContentTypeJSON,
		}
	}
	return nil
}

func newErrWatcher(err error) *errWatcher {
	// Create an error event
	errEvent := watch.Event{Type: watch.Error}
	switch err := err.(type) {
	case runtime.Object:
		errEvent.Object = err
	case *errors.StatusError:
		errEvent.Object = &err.ErrStatus
	default:
		errEvent.Object = &unversioned.Status{
			Status:  unversioned.StatusFailure,
			Message: err.Error(),
			Reason:  unversioned.StatusReasonInternalError,
			Code:    http.StatusInternalServerError,
		}
	}

	// Create a watcher with room for a single event, populate it, and close the channel
	watcher := &errWatcher{result: make(chan watch.Event, 1)}
	watcher.result <- errEvent
	close(watcher.result)

	return watcher
}