func (a *API) FetchMetric(cid CIDType) (*Metric, error) {
	if cid == nil || *cid == "" {
		return nil, fmt.Errorf("Invalid metric CID [none]")
	}

	metricCID := string(*cid)

	matched, err := regexp.MatchString(config.MetricCIDRegex, metricCID)
	if err != nil {
		return nil, err
	}
	if !matched {
		return nil, fmt.Errorf("Invalid metric CID [%s]", metricCID)
	}

	result, err := a.Get(metricCID)
	if err != nil {
		return nil, err
	}

	if a.Debug {
		a.Log.Printf("[DEBUG] fetch metric, received JSON: %s", string(result))
	}

	metric := &Metric{}
	if err := json.Unmarshal(result, metric); err != nil {
		return nil, err
	}

	return metric, nil
}
func (a *API) FetchMetric(cid CIDType) (*Metric, error) {
	if cid == nil || *cid == "" {
		return nil, fmt.Errorf("Invalid metric CID [none]")
	}

	metricCID := string(*cid)

	matched, err := regexp.MatchString(config.MetricCIDRegex, metricCID)
	if err != nil {
		return nil, err
	}
	if !matched {
		return nil, fmt.Errorf("Invalid metric CID [%s]", metricCID)
	}

	result, err := a.Get(metricCID)
	if err != nil {
		return nil, err
	}

	if a.Debug {
		a.Log.Printf("[DEBUG] fetch metric, received JSON: %s", string(result))
	}

	metric := &Metric{}
	if err := json.Unmarshal(result, metric); err != nil {
		return nil, err
	}

	return metric, nil
}
// FetchMetric retrieves metric with passed cid.