Method AddSubmetric

metrics/metric.go:40–82

AddSubmetric creates a new submetric from the key:value threshold definition and adds it to the metric's submetrics list.

(keyValues string)

// AddSubmetric creates a new submetric from the key:value threshold definition
// and adds it to the metric's submetrics list.
func (m *Metric) AddSubmetric(keyValues string) (*Submetric, error) {
	keyValues = strings.TrimSpace(keyValues)
	if len(keyValues) == 0 {
		return nil, fmt.Errorf("submetric criteria for metric '%s' cannot be empty", m.Name)
	}
	kvs := strings.Split(keyValues, ",")
	tags := m.registry.RootTagSet()
	for _, kv := range kvs {
		if kv == "" {
			continue
		}
		k, v, _ := strings.Cut(kv, ":")

		key := strings.Trim(strings.TrimSpace(k), `"'`)
		if v == "" {
			tags = tags.With(key, "")
			continue
		}

		value := strings.Trim(strings.TrimSpace(v), `"'`)
		tags = tags.With(key, value)
	}

	for _, sm := range m.Submetrics {
		if tags == sm.Tags {
			return sm, nil
		}
	}

	subMetric := &Submetric{
		Name:   m.Name + "{" + keyValues + "}",
		Suffix: keyValues,
		Tags:   tags,
		Parent: m,
	}
	subMetricMetric := m.registry.newMetric(subMetric.Name, m.Type, m.Contains)
	subMetricMetric.Sub = subMetric // sigh
	subMetric.Metric = subMetricMetric

	m.Submetrics = append(m.Submetrics, subMetric)

	return subMetric, nil
}

// ErrMetricNameParsing indicates parsing a metric name failed
var ErrMetricNameParsing = errors.New("parsing metric name failed")