plugeth/metrics/resetting_sample.go

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package metrics
// ResettingSample converts an ordinary sample into one that resets whenever its
// snapshot is retrieved. This will break for multi-monitor systems, but when only
// a single metric is being pushed out, this ensure that low-frequency events don't
// skew th charts indefinitely.
func ResettingSample(sample Sample) Sample {
return &resettingSample{
Sample: sample,
}
}
// resettingSample is a simple wrapper around a sample that resets it upon the
// snapshot retrieval.
type resettingSample struct {
Sample
}
// Snapshot returns a read-only copy of the sample with the original reset.
func (rs *resettingSample) Snapshot() Sample {
s := rs.Sample.Snapshot()
rs.Sample.Clear()
return s
}