Interface StateTracker

statetracker/tracker.go:13–24

var log = logger.New("stateTracker")

type StateTracker interface {
	Get() interface{}
	Set(interface{}) bool

	// The time that the StateTracker has spent being "previous"
	// If already "desired", returns 0
	Duration(previous interface{}, desired interface{}) time.Duration
	Wait(ctx context.Context, desired interface{}) bool

	NewListener() <-chan *Notification
	RemoveListener(listener <-chan *Notification)
}

type stateTracker struct {
	cond      *sync.Cond