user can add attachment

common/proxy/proxy.go

@@ -140,6 +140,14 @@ func (p *Proxy) Implement(v common.RPCService) {
 				inv.SetAttachments(k, value)
 			}
 
+			// add user setAttachment
+			atm := invCtx.Value("attachment")
+			if m, ok := atm.(map[string]string); ok {
+				for k, value := range m {
+					inv.SetAttachments(k, value)
+				}
+			}
+
 			result := p.invoke.Invoke(invCtx, inv)
 
 			err = result.Error()

config/generic_service.go

@@ -17,9 +17,11 @@
 
 package config
 
+import "context"
+
 // GenericService ...
 type GenericService struct {
-	Invoke       func(req []interface{}) (interface{}, error) `dubbo:"$invoke"`
+	Invoke       func(ctx context.Context, req []interface{}) (interface{}, error) `dubbo:"$invoke"`
 	referenceStr string
 }