metrics

package

v1.0.0 Latest Latest Go to latest Published: Oct 19, 2025 License: Apache-2.0 Imports: 2 Imported by: 0

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type Labels map[string]string

Labels is a simple key:value map for metric dimensions.

type MetricsRecorder interface {
	IncCounter(name string, labels Labels)
	ObserveHistogram(name string, value float64, labels Labels)
}

MetricsRecorder captures counters and histograms.

type Middleware struct {
	M MetricsRecorder
}

Middleware instruments HTTP traffic using a provided recorder.

func New(m MetricsRecorder) *Middleware

New constructs a metrics middleware.

func (mw *Middleware) Handler(next http.Handler) http.Handler

Handler wraps the next handler to record counters and duration.

type NoopMetrics struct{}

NoopMetrics is the default. Swap later for Prometheus, etc.

func (NoopMetrics) IncCounter(_ string, _ Labels)

func (NoopMetrics) ObserveHistogram(_ string, _ float64, _ Labels)