common

type Config struct {
	// PollInterval is the sleep duration between each sleep.
	// PollInterval should always be greater than zero or the watcher i
	//initialization fails.
	PollInterval time.Duration

	// CloseTimout defines how long for to wait for watcher.Close() to complete.
	// A CloseTimeout of zero waits indefinitely for the watcher.Close() operation
	// to complete
	CloseTimeout time.Duration
}

type Stats struct {
	KeyWatchCount       int64
	KeyNewWatchCount    int64
	KeyNewValueDetected int64
	KeyGetDuration      histogram.Fast

	WatcherClosedByContext      int64
	WatcherClosedByWatcherClose int64
	WatcherCloseDuration        histogram.Fast
}

type StatsCollector interface {
	Collect(Stats)
}