Function MetricNameFromLabelAdapters

pkg/util/extract/extract.go:18–27

MetricNameFromLabelAdapters extracts the metric name from a list of LabelPairs. The returned metric name string is a copy of the label value.

(labels []cortexpb.LabelAdapter)

// MetricNameFromLabelAdapters extracts the metric name from a list of LabelPairs.
// The returned metric name string is a copy of the label value.
func MetricNameFromLabelAdapters(labels []cortexpb.LabelAdapter) (string, error) {
	unsafeMetricName, err := UnsafeMetricNameFromLabelAdapters(labels)
	if err != nil {
		return "", err
	}

	// Force a string copy since LabelAdapter is often a pointer into
	// a large gRPC buffer which we don't want to keep alive on the heap.
	return string([]byte(unsafeMetricName)), nil
}

// UnsafeMetricNameFromLabelAdapters extracts the metric name from a list of LabelPairs.
// The returned metric name string is a reference to the label value (no copy).