metric

type Counter interface {
	Metric
	Add(value float64, labelValues ...string)
}

type EmptyExporter struct {
}

type Exporter interface {
	// NewCounter creates a Counter metric partitioned by the given label names.
	NewCounter(name, desc string, labelNames []string) Counter
	// NewGauge creates a Gauge metric partitioned by the given label names.
	NewGauge(name, desc string, labelNames []string) Gauge
	// NewHistogram creates a histogram metric partitioned by the given label names.
	NewHistogram(name, desc string, buckets []float64, labelNames []string) Histogram
	// HTTPHandler returns http.Handler used to export metrics.
	HTTPHandler() http.Handler
}

type Gauge interface {
	Metric
	Set(value float64, labelValues ...string)
}

type Histogram interface {
	Metric
	Observe(value float64, labelValues ...string)
}

type Metric interface {
	// Register registers the Metric.
	Register() error
	// Unregister unregisters the Metric.
	Unregister() bool
	// Reset deletes all values of the Metric.
	Reset()
}