watcher

type Event struct {
	// Id is registry id
	Id string
	// Type defines type of event
	Type EventType
	// Timestamp is event timestamp
	Timestamp time.Time
	// Service is registry service
	Service *discovery.Service
}

type EventType int

type Result struct {
	Action  string
	Service *discovery.Service
}

type WatchOption func(*WatchOptions)

type WatchOptions struct {
	// Specify a service to watch
	// If blank, the watch is for all services
	Service string
	// Other options for implementations of the interface
	// can be stored in a context
	Context context.Context
}

type Watcher interface {
	// Next is a blocking call
	Next() (*Result, error)
	Stop()
}