First commit - WriteToTextfile

Signed-off-by: Sevag Hanssian <[email protected]>

prometheus/registry.go

@@ -533,6 +533,50 @@ func (r *Registry) Gather() ([]*dto.MetricFamily, error) {
  return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap()
 }
 
+func (r *Registry) WriteToTextfile(path string) error {
+ metricFamilies, err := r.Gather()
+ if err != nil {
+ return err
+ }
+ output := []string{}
+ for _, metricFamily := range metricFamilies {
+ output = append(output, fmt.Sprintf("# HELP %s %s", metricFamily.GetName(), metricFamily.GetHelp()))
+ output = append(output, fmt.Sprintf("# TYPE %s %s", metricFamily.GetName(), metricFamily.GetType().String()))
+ for _, metric := range metricFamily.GetMetric() {
+ labelString := ""
+ if metric.GetLabel() != nil {
+ labelStrings := []string{}
+ for _, labelPair := range metric.GetLabel() {
+ labelStrings = append(labelStrings, fmt.Sprintf("%s=\"%s\"", labelPair.GetName(), labelPair.GetValue()))
+ }
+ labelString = fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
+ }
+ timestampString := ""
+ if metric.TimestampMs != nil {
+ timestampString = fmt.Sprintf(" %d", int(float64(metric.GetTimestampMs())*1000))
+ }
+ var value float64
+ switch metricFamily.GetType() {
+ case dto.MetricType_COUNTER:
+ value = metric.GetCounter().GetValue()
+ case dto.MetricType_GAUGE:
+ value = metric.GetGauge().GetValue()
+ case dto.MetricType_SUMMARY:
+ //value = metric.GetSummary().GetValue()
+ //what to do here
+ case dto.MetricType_HISTOGRAM:
+ //same
+ //value = metric.GetHistogram().GetValue()
+ case dto.MetricType_UNTYPED:
+ value = metric.GetUntyped().GetValue()
+ }
+ output = append(output, fmt.Sprintf("%s%s %f%s", metricFamily.GetName(), labelString, value, timestampString))
+ }
+ }
+ fmt.Println(strings.Join(output, "\n"))
+ return nil
+}
+
 // processMetric is an internal helper method only used by the Gather method.
 func processMetric(
  metric Metric,