rename mucp source directory to service

config/source/service/watcher.go

@@ -0,0 +1,27 @@
+package service
+
+import (
+	"github.com/micro/go-micro/config/source"
+	proto "github.com/micro/go-micro/config/source/service/proto"
+)
+
+type watcher struct {
+	stream proto.Service_WatchService
+}
+
+func newWatcher(stream proto.Service_WatchService) (source.Watcher, error) {
+	return &watcher{stream: stream}, nil
+}
+
+func (w *watcher) Next() (*source.ChangeSet, error) {
+	var rsp proto.WatchResponse
+	err := w.stream.RecvMsg(&rsp)
+	if err != nil {
+		return nil, err
+	}
+	return toChangeSet(rsp.ChangeSet), nil
+}
+
+func (w *watcher) Stop() error {
+	return w.stream.Close()
+}