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package metrics
import "context"
// NopMeterProvider is a no-op metrics implementation.
type NopMeterProvider struct{}
var _ MeterProvider = (*NopMeterProvider)(nil)
// Meter returns a meter which creates no-op instruments.
func (NopMeterProvider) Meter(string, ...MeterOption) Meter {
return nopMeter{}
}
type nopMeter struct{}
var _ Meter = (*nopMeter)(nil)
func (nopMeter) Int64Counter(string, ...InstrumentOption) (Int64Counter, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64UpDownCounter(string, ...InstrumentOption) (Int64UpDownCounter, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64Gauge(string, ...InstrumentOption) (Int64Gauge, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64Histogram(string, ...InstrumentOption) (Int64Histogram, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64AsyncCounter(string, Int64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64AsyncUpDownCounter(string, Int64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Int64AsyncGauge(string, Int64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[int64]{}, nil
}
func (nopMeter) Float64Counter(string, ...InstrumentOption) (Float64Counter, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64UpDownCounter(string, ...InstrumentOption) (Float64UpDownCounter, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64Gauge(string, ...InstrumentOption) (Float64Gauge, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64Histogram(string, ...InstrumentOption) (Float64Histogram, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64AsyncCounter(string, Float64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64AsyncUpDownCounter(string, Float64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[float64]{}, nil
}
func (nopMeter) Float64AsyncGauge(string, Float64Callback, ...InstrumentOption) (AsyncInstrument, error) {
return nopInstrument[float64]{}, nil
}
type nopInstrument[N any] struct{}
func (nopInstrument[N]) Add(context.Context, N, ...RecordMetricOption) {}
func (nopInstrument[N]) Sample(context.Context, N, ...RecordMetricOption) {}
func (nopInstrument[N]) Record(context.Context, N, ...RecordMetricOption) {}
func (nopInstrument[_]) Stop() {}
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