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web: Trim excessive line length in federate.go

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Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
beorn7 2025-09-19 00:35:12 +02:00
parent d5cc5e2738
commit aac5cc3d99
1 changed files with 23 additions and 11 deletions
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34
web/federate.go
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@ -190,7 +190,9 @@ Loop:
isHistogram := s.H != nil isHistogram := s.H != nil
formatType := format.FormatType() formatType := format.FormatType()
if isHistogram && if isHistogram &&
formatType != expfmt.TypeProtoDelim && formatType != expfmt.TypeProtoText && formatType != expfmt.TypeProtoCompact { formatType != expfmt.TypeProtoDelim &&
formatType != expfmt.TypeProtoText &&
formatType != expfmt.TypeProtoCompact {
// Can't serve the native histogram. // Can't serve the native histogram.
// TODO(codesome): Serve them when other protocols get the native histogram support. // TODO(codesome): Serve them when other protocols get the native histogram support.
continue continue
@ -208,20 +210,30 @@ Loop:
} }
if l.Name == labels.MetricName { if l.Name == labels.MetricName {
nameSeen = true nameSeen = true
if l.Value == lastMetricName && // We already have the name in the current MetricDescriptor, and we ignore nameless metrics. // We already have the name in the current MetricDescriptor,
lastWasHistogram == isHistogram && // The sample type matches (float vs histogram). // and we ignore nameless metrics.
// If it was a histogram, the histogram type (counter vs gauge) also matches. if l.Value == lastMetricName &&
(!isHistogram || lastHistogramWasGauge == (s.H.CounterResetHint == histogram.GaugeType)) { // The sample type matches (float vs histogram).
lastWasHistogram == isHistogram &&
// If it was a histogram, the histogram type
// (counter vs gauge) also matches.
(!isHistogram ||
lastHistogramWasGauge == (s.H.CounterResetHint == histogram.GaugeType)) {
return nil return nil
} }
// Since we now check for the sample type and type of histogram above, we will end up // Since we now check for the sample type and
// creating multiple metric families for the same metric name. This would technically be // type of histogram above, we will end up
// an invalid exposition. But since the consumer of this is Prometheus, and Prometheus can // creating multiple metric families for the
// parse it fine, we allow it and bend the rules to make federation possible in those cases. // same metric name. This would technically be
// an invalid exposition. But since the consumer
// of this is Prometheus, and Prometheus can
// parse it fine, we allow it and bend the rules
// to make federation possible in those cases.
// Need to start a new MetricDescriptor. Ship off the old one (if any) before // Need to start a new MetricDescriptor. Ship
// creating the new one. // off the old one (if any) before creating the
// new one.
if protMetricFam != nil { if protMetricFam != nil {
if err := enc.Encode(protMetricFam); err != nil { if err := enc.Encode(protMetricFam); err != nil {
return err return err