Function WithLabelFromCtx

prometheus/promhttp/option.go:80–84

WithLabelFromCtx registers a label for dynamic resolution with access to context. See the example for ExampleInstrumentHandlerWithLabelResolver for example usage

(name string, valueFn LabelValueFromCtx)

// WithLabelFromCtx registers a label for dynamic resolution with access to context.
// See the example for ExampleInstrumentHandlerWithLabelResolver for example usage
func WithLabelFromCtx(name string, valueFn LabelValueFromCtx) Option {
	return optionApplyFunc(func(o *options) {
		o.extraLabelsFromCtx[name] = valueFn
	})
}