usage_metrics

type Counter interface {
	// Inc increment the counter by 1.
	Inc()
}

type UniqueCounter interface {
	Add(int64)
}

type UsageData struct {
	Counters       map[string]int64
	UniqueCounters map[string][]int64
}

type UsageTracker struct {
	// contains filtered or unexported fields
}

type UsageTrackerCollector interface {
	// CloneUsageData returns collected usage data.
	// Only non-zero counters are returned.
	CloneUsageData() *UsageData
	Subtract(data *UsageData)
}

type UsageTrackerInterface interface {
	UsageTrackerRegisterer
	UsageTrackerCollector
}

type UsageTrackerRegisterer interface {
	RegisterCounter(name string) Counter
	RegisterUniqueCounter(name string) UniqueCounter
}