Method NewMetric

metrics/registry.go:43–67

NewMetric returns new metric registered to this registry TODO have multiple versions returning specific metric types when we have such things

(name string, typ MetricType, t ...ValueType)

// NewMetric returns new metric registered to this registry
// TODO have multiple versions returning specific metric types when we have such things
func (r *Registry) NewMetric(name string, typ MetricType, t ...ValueType) (*Metric, error) {
	r.l.Lock()
	defer r.l.Unlock()

	if !checkName(name) {
		return nil, fmt.Errorf("Invalid metric name: '%s'. %s", name, badNameWarning) //nolint:staticcheck
	}
	oldMetric, ok := r.metrics[name]

	if !ok {
		m := r.newMetric(name, typ, t...)
		r.metrics[name] = m
		return m, nil
	}
	if oldMetric.Type != typ {
		return nil, fmt.Errorf("metric '%s' already exists but with type %s, instead of %s", name, oldMetric.Type, typ)
	}
	if len(t) > 0 {
		if t[0] != oldMetric.Contains {
			return nil, fmt.Errorf("metric '%s' already exists but with a value type %s, instead of %s",
				name, oldMetric.Contains, t[0])
		}
	}
	return oldMetric, nil
}

// MustNewMetric is like NewMetric, but will panic if there is an error
func (r *Registry) MustNewMetric(name string, typ MetricType, t ...ValueType) *Metric {