add vault/etcd

config/source/vault/watcher.go

@@ -0,0 +1,32 @@
+package vault
+
+import (
+	"errors"
+	"github.com/hashicorp/vault/api"
+	"github.com/micro/go-micro/config/source"
+)
+
+type watcher struct {
+	c    *api.Client
+	exit chan bool
+}
+
+func newWatcher(c *api.Client) *watcher {
+	return &watcher{
+		c:    c,
+		exit: make(chan bool),
+	}
+}
+
+func (w *watcher) Next() (*source.ChangeSet, error) {
+	<-w.exit
+	return nil, errors.New("url watcher stopped")
+}
+
+func (w *watcher) Stop() error {
+	select {
+	case <-w.exit:
+	default:
+	}
+	return nil
+}