func()

in exporter/collector/metrics.go [1579:1617]

• 38 lines of code
• 6 McCabe index (conditional complexity)

func (m *metricMapper) metricDescriptor(
	pm pmetric.Metric,
	extraLabels labels,
) []*metricpb.MetricDescriptor {
	if pm.Type() == pmetric.MetricTypeSummary {
		return m.summaryMetricDescriptors(pm, extraLabels)
	}
	kind, typ := m.mapMetricPointKind(pm)
	if kind == metricpb.MetricDescriptor_METRIC_KIND_UNSPECIFIED {
		m.obs.log.Debug("Failed to get metric kind (i.e. aggregation) for metric descriptor. Dropping the metric descriptor.", zap.Any("metric", pm))
		return nil
	}
	if typ == metricpb.MetricDescriptor_VALUE_TYPE_UNSPECIFIED {
		m.obs.log.Debug("Failed to get metric type (int / double) for metric descriptor. Dropping the metric descriptor.", zap.Any("metric", pm))
		return nil
	}
	metricType, err := m.metricNameToType(pm.Name(), pm)
	if err != nil {
		m.obs.log.Debug("Failed to get metric type (i.e. name) for metric descriptor. Dropping the metric descriptor.", zap.Error(err), zap.Any("metric", pm))
		return nil
	}
	labels := m.labelDescriptors(pm, extraLabels)
	// Return nil for unsupported types.
	if kind == metricpb.MetricDescriptor_METRIC_KIND_UNSPECIFIED {
		return nil
	}
	return []*metricpb.MetricDescriptor{
		{
			Name:        pm.Name(),
			DisplayName: m.metricTypeToDisplayName(metricType),
			Type:        metricType,
			MetricKind:  kind,
			ValueType:   typ,
			Unit:        pm.Unit(),
			Description: pm.Description(),
			Labels:      labels,
		},
	}
}