exporter

type HttpServerPathHandler struct {
	Path    string
	Handler http.Handler
}

type LabelValueTracker interface {
	Observe(labels map[string]string) (bool, error)
	DeleteByLabels(labels map[string]string) ([]map[string]string, error)
	DeleteByRetention(retention time.Duration) []map[string]string
}

type Match struct {
	Labels map[string]string
	Value  float64
}

type Metric interface {
	Name() string
	Collector() prometheus.Collector

	// Returns the match if the line matched, and nil if the line didn't match.
	ProcessMatch(line string) (*Match, error)
	// Returns the match if the delete pattern matched, nil otherwise.
	ProcessDeleteMatch(line string) (*Match, error)
	// Remove old metrics
	ProcessRetention() error
}

type Patterns map[string]string