kubernetes/pkg/volume/metrics_cached.go

var _ …

type cachedMetrics …

// NewCachedMetrics creates a new cachedMetrics wrapping another
// MetricsProvider and caching the results.
func NewCachedMetrics(provider MetricsProvider) MetricsProvider { … }

// GetMetrics runs the wrapped metrics provider's GetMetrics method once and
// caches the result. Will not cache result if there is an error.
// See MetricsProvider.GetMetrics
func (md *cachedMetrics) GetMetrics() (*Metrics, error) { … }

type cacheOnce …

// Copied from sync.Once but we don't want to cache the results if there is an
// error
func (o *cacheOnce) cache(f func() error) { … }