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component-base/metrics: Add NewConstMetric function

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so that a caller can use the metrics.Metric structure but still handle
errors

Signed-off-by: Peter Hunt <pehunt@redhat.com>
This commit is contained in:
Peter Hunt 2022-11-04 14:25:55 -04:00
parent 81bd2496bc
commit 435606b109
1 changed files with 10 additions and 0 deletions
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10
staging/src/k8s.io/component-base/metrics/value.go
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@ -47,6 +47,16 @@ func NewLazyConstMetric(desc *Desc, valueType ValueType, value float64, labelVal
return prometheus.MustNewConstMetric(desc.toPrometheusDesc(), valueType.toPromValueType(), value, labelValues...)
}
// NewConstMetric is a helper of NewConstMetric.
//
// Note: If the metrics described by the desc is hidden, the metrics will not be created.
func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) (Metric, error) {
if desc.IsHidden() {
return nil, nil
}
return prometheus.NewConstMetric(desc.toPrometheusDesc(), valueType.toPromValueType(), value, labelValues...)
}
// NewLazyMetricWithTimestamp is a helper of NewMetricWithTimestamp.
//
// Warning: the Metric 'm' must be the one created by NewLazyConstMetric(),