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feat: add ClearRegistry endpoint to clear all metrics immediately #752

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AruneshDwivedi wants to merge 1 commit into from
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feat: add ClearRegistry endpoint to clear all metrics immediately #752

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1 change: 1 addition & 0 deletions pkg/exporter/exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@ type Registry interface {
GetHistogram(metricName string, labels prometheus.Labels, help string, mapping *mapper.MetricMapping, metricsCount *prometheus.GaugeVec) (prometheus.Observer, error)
GetSummary(metricName string, labels prometheus.Labels, help string, mapping *mapper.MetricMapping, metricsCount *prometheus.GaugeVec) (prometheus.Observer, error)
RemoveStaleMetrics()
ClearRegistry()
}

type Exporter struct {
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19 changes: 19 additions & 0 deletions pkg/registry/registry.go
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Original file line number Diff line number Diff line change
Expand Up @@ -395,6 +395,25 @@ func (r *Registry) RemoveStaleMetrics() {
}
}

func (r *Registry) ClearRegistry() {
for metricName, metric := range r.Metrics {
for hash, rm := range metric.Metrics {
metric.Vectors[rm.VecKey].Holder.Delete(rm.Labels)
metric.Vectors[rm.VecKey].RefCount--
delete(metric.Metrics, hash)
}
// Clear vectors that have no remaining metrics
for vecHash, vec := range metric.Vectors {
if vec.RefCount <= 0 {
delete(metric.Vectors, vecHash)
}
}
if len(metric.Vectors) == 0 {
delete(r.Metrics, metricName)
}
}
}

// Calculates a hash of both the label names and values.
func (r *Registry) HashLabels(labels prometheus.Labels) (metrics.LabelHash, []string) {
r.Hasher.Reset()
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