go/opentelemetry-go
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Code Issues Releases Activity

Update the RegisterCallback of the SDK meter (#3604)

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Tyler Yahn 2023-01-24 07:56:11 -08:00 committed by GitHub
parent 697bc18d29
commit 828892954b
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1 changed files with 10 additions and 2 deletions
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12
sdk/metric/meter.go
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@ -205,8 +205,16 @@ func (m *meter) Float64ObservableGauge(name string, options ...instrument.Float6
return inst, nil
}
// RegisterCallback registers the function f to be called when any of the
// insts Collect method is called.
// RegisterCallback registers f to be called each collection cycle so it will
// make observations for insts during those cycles.
//
// The only instruments f can make observations for are insts. All other
// observations will be dropped and an error will be logged.
//
// Only instruments from this meter can be registered with f, an error is
// returned if other instrument are provided.
//
// The returned Registration can be used to unregister f.
func (m *meter) RegisterCallback(f metric.Callback, insts ...instrument.Asynchronous) (metric.Registration, error) {
if len(insts) == 0 {
// Don't allocate a observer if not needed.