Golang Time.IsZero方法代碼示例

func (u *Unstructured) GetDeletionTimestamp() *unversioned.Time {
	var timestamp unversioned.Time
	timestamp.UnmarshalQueryParameter(getNestedString(u.Object, "metadata", "deletionTimestamp"))
	if timestamp.IsZero() {
		return nil
	}
	return &timestamp
}

// hasIngressBeenTouched returns true if the route appears to have been touched since the last time
func (a *StatusAdmitter) hasIngressBeenTouched(route *routeapi.Route, lastTouch *unversioned.Time) bool {
	glog.V(4).Infof("has last touch %v for %s/%s", lastTouch, route.Namespace, route.Name)
	if lastTouch.IsZero() {
		return false
	}
	old, ok := a.expected.Get(route.UID)
	if !ok || old.(time.Time).Equal(lastTouch.Time) {
		return false
	}
	return true
}

func printImageStream(stream *imageapi.ImageStream, w io.Writer, opts kctl.PrintOptions) error {
	name := formatResourceName(opts.Kind, stream.Name, opts.WithKind)
	tags := ""
	const numOfTagsShown = 3

	var latest unversioned.Time
	for _, list := range stream.Status.Tags {
		if len(list.Items) > 0 {
			if list.Items[0].Created.After(latest.Time) {
				latest = list.Items[0].Created
			}
		}
	}
	latestTime := ""
	if !latest.IsZero() {
		latestTime = fmt.Sprintf("%s ago", formatRelativeTime(latest.Time))
	}
	list := imageapi.SortStatusTags(stream.Status.Tags)
	more := false
	if len(list) > numOfTagsShown {
		list = list[:numOfTagsShown]
		more = true
	}
	tags = strings.Join(list, ",")
	if more {
		tags = fmt.Sprintf("%s + %d more...", tags, len(stream.Status.Tags)-numOfTagsShown)
	}
	if opts.WithNamespace {
		if _, err := fmt.Fprintf(w, "%s\t", stream.Namespace); err != nil {
			return err
		}
	}
	repo := stream.Spec.DockerImageRepository
	if len(repo) == 0 {
		repo = stream.Status.DockerImageRepository
	}
	if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s", name, repo, tags, latestTime); err != nil {
		return err
	}
	if err := appendItemLabels(stream.Labels, w, opts.ColumnLabels, opts.ShowLabels); err != nil {
		return err
	}
	return nil
}

func describeBuildPhase(build *buildapi.Build, t *unversioned.Time, parentName string, pushTargetResolved bool) string {
	imageStreamFailure := ""
	// if we're using an image stream and that image stream is the internal registry and that registry doesn't exist
	if (build.Spec.Output.To != nil) && !pushTargetResolved {
		imageStreamFailure = " (can't push to image)"
	}

	if t == nil {
		ts := buildTimestamp(build)
		t = &ts
	}
	var time string
	if t.IsZero() {
		time = "<unknown>"
	} else {
		time = strings.ToLower(formatRelativeTime(t.Time))
	}
	buildIdentification := fmt.Sprintf("build/%s", build.Name)
	prefix := parentName + "-"
	if strings.HasPrefix(build.Name, prefix) {
		suffix := build.Name[len(prefix):]

		if buildNumber, err := strconv.Atoi(suffix); err == nil {
			buildIdentification = fmt.Sprintf("build #%d", buildNumber)
		}
	}

	revision := describeSourceRevision(build.Spec.Revision)
	if len(revision) != 0 {
		revision = fmt.Sprintf(" - %s", revision)
	}
	switch build.Status.Phase {
	case buildapi.BuildPhaseComplete:
		return fmt.Sprintf("%s succeeded %s ago%s%s", buildIdentification, time, revision, imageStreamFailure)
	case buildapi.BuildPhaseError:
		return fmt.Sprintf("%s stopped with an error %s ago%s%s", buildIdentification, time, revision, imageStreamFailure)
	case buildapi.BuildPhaseFailed:
		return fmt.Sprintf("%s failed %s ago%s%s", buildIdentification, time, revision, imageStreamFailure)
	default:
		status := strings.ToLower(string(build.Status.Phase))
		return fmt.Sprintf("%s %s for %s%s%s", buildIdentification, status, time, revision, imageStreamFailure)
	}
}

// hasIngressBeenTouched returns true if the route appears to have been touched since the last time
func (a *StatusAdmitter) hasIngressBeenTouched(route *routeapi.Route, lastTouch *unversioned.Time) bool {
	glog.V(4).Infof("has last touch %v for %s/%s", lastTouch, route.Namespace, route.Name)
	if lastTouch.IsZero() {
		return false
	}
	old, ok := a.expected.Get(route.UID)
	if ok && old.(time.Time).Before(nowFn().Add(-a.contentionInterval)) {
		// throw out cache entries from before the contention interval, in case this is no longer valid
		// (e.g. the previous updater no longer exists due to scale down)
		glog.V(4).Infof("expired cached last touch of %s", old.(time.Time))
		a.expected.Remove(route.UID)
		ok = false
	}

	if !ok || old.(time.Time).Equal(lastTouch.Time) {
		glog.V(4).Infof("missing or equal cached last touch")
		return false
	}
	glog.V(4).Infof("different cached last touch of %s", old.(time.Time))
	return true
}

func printImageStream(stream *imageapi.ImageStream, w io.Writer, withNamespace, wide, showAll bool, columnLabels []string) error {
	tags := ""
	const numOfTagsShown = 3

	var latest unversioned.Time
	for _, list := range stream.Status.Tags {
		if len(list.Items) > 0 {
			if list.Items[0].Created.After(latest.Time) {
				latest = list.Items[0].Created
			}
		}
	}
	latestTime := ""
	if !latest.IsZero() {
		latestTime = fmt.Sprintf("%s ago", formatRelativeTime(latest.Time))
	}
	list := imageapi.SortStatusTags(stream.Status.Tags)
	more := false
	if len(list) > numOfTagsShown {
		list = list[:numOfTagsShown]
		more = true
	}
	tags = strings.Join(list, ",")
	if more {
		tags = fmt.Sprintf("%s + %d more...", tags, len(stream.Status.Tags)-numOfTagsShown)
	}
	if withNamespace {
		if _, err := fmt.Fprintf(w, "%s\t", stream.Namespace); err != nil {
			return err
		}
	}
	repo := stream.Spec.DockerImageRepository
	if len(repo) == 0 {
		repo = stream.Status.DockerImageRepository
	}
	_, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\n", stream.Name, repo, tags, latestTime)
	return err
}

// translateTimestamp returns the elapsed time since timestamp in
// human-readable approximation.
func translateTimestamp(timestamp unversioned.Time) string {
	if timestamp.IsZero() {
		return "<unknown>"
	}
	return shortHumanDuration(time.Now().Sub(timestamp.Time))
}

// translateTimestamp returns the elapsed time since timestamp in
// human-readable approximation.
func TranslateTimestamp(timestamp api_uv.Time) string {
	if timestamp.IsZero() {
		return "<unknown>"
	}
	return shortHumanDuration(time.Now().Sub(timestamp.Time))
}