Update store

store/store.go

@@ -6,6 +6,14 @@ import (
 	"errors"
 )
 
+type EventType int
+
+const (
+	EventTypeUnknown = iota
+	EventTypeConnect
+	EventTypeDisconnect
+)
+
 var (
 	// ErrNotFound is returned when a key doesn't exist
 	ErrNotFound = errors.New("not found")
@@ -17,6 +25,11 @@ var (
 	DefaultSeparator = "/"
 )
 
+type Event interface {
+	Error() error
+	Type() EventType
+}
+
 // Store is a data storage interface
 type Store interface {
 	Name() string
@@ -41,3 +54,12 @@ type Store interface {
 	// String returns the name of the implementation.
 	String() string
 }
+
+type Watcher interface {
+	// Next is a blocking call
+	Next() (Event, error)
+	// Stop stops the watcher
+	Stop()
+}
+
+func Watch(context.Context) (Watcher, error)