metrics

type HealthStateSetter interface {
	Set(healthState apiv1.HealthStateType)
}

type Metric struct {
	// UnixMilliseconds represents the Unix timestamp of the metric.
	UnixMilliseconds int64 `json:"unix_milliseconds"`
	// Component represents the name of the component this metric belongs to.
	Component string `json:"component"`
	// Name represents the name of the metric.
	Name string `json:"name"`
	// Value represents the numeric value of the metric.
	Value float64 `json:"value"`

	// Labels represents all the labels of the metric.
	Labels map[string]string `json:"labels,omitempty"`
}

type Metrics []Metric

type Op struct {
	Since              time.Time
	SelectedComponents map[string]struct{}
}

type OpOption func(*Op)

type Recorder interface {
	// Start starts the periodic metrics recorder.
	Start()
}

type Scraper interface {
	Scrape(context.Context) (Metrics, error)
}

type Store interface {
	// Record records metric data points.
	Record(ctx context.Context, ms ...Metric) error

	// Returns all the data points since the given time.
	// If since is zero, returns all metrics.
	Read(ctx context.Context, opts ...OpOption) (Metrics, error)

	// Purge purges the metrics data points before the given time.
	Purge(ctx context.Context, before time.Time) (int, error)
}