add another api with specified gid

dtmcli/message.go

@@ -31,9 +31,14 @@ type MsgStep struct {
 
 // NewMsg create new msg
 func NewMsg(server string) *Msg {
+	return NewMsg2(server, GenGid(server))
+}
+
+// NewMsg2 create new msg with specified gid
+func NewMsg2(server string, gid string) *Msg {
 	return &Msg{
 		MsgData: MsgData{
-			Gid:       GenGid(server),
+			Gid:       gid,
 			TransType: "msg",
 		},
 		Server: server,

dtmcli/saga.go

@@ -31,9 +31,14 @@ type SagaStep struct {
 
 // NewSaga create a saga
 func NewSaga(server string) *Saga {
+	return NewSaga2(server, GenGid(server))
+}
+
+// NewSaga2 create a saga
+func NewSaga2(server string, gid string) *Saga {
 	return &Saga{
 		SagaData: SagaData{
-			Gid:       GenGid(server),
+			Gid:       gid,
 			TransType: "saga",
 		},
 		Server: server,

dtmcli/tcc.go

@@ -22,7 +22,12 @@ type TccGlobalFunc func(tcc *Tcc) error
 
 // TccGlobalTransaction begin a tcc global transaction
 func TccGlobalTransaction(dtm string, tccFunc TccGlobalFunc) (gid string, rerr error) {
-	gid = GenGid(dtm)
+	return TccGlobalTransaction2(dtm, GenGid(dtm), tccFunc)
+}
+
+// TccGlobalTransaction2 begin a tcc global transaction
+func TccGlobalTransaction2(dtm string, gidIn string, tccFunc TccGlobalFunc) (gid string, rerr error) {
+	gid = gidIn
 	data := &M{
 		"gid":        gid,
 		"trans_type": "tcc",

dtmcli/xa.go

@@ -116,7 +116,12 @@ func (xc *XaClient) XaLocalTransaction(c *gin.Context, transFunc XaLocalFunc) (r
 
 // XaGlobalTransaction start a xa global transaction
 func (xc *XaClient) XaGlobalTransaction(transFunc XaGlobalFunc) (gid string, rerr error) {
-	xa := Xa{IDGenerator: IDGenerator{}, Gid: GenGid(xc.Server)}
+	return xc.XaGlobalTransaction2(GenGid(xc.Server), transFunc)
+}
+
+// XaGlobalTransaction2 start a xa global transaction with gid=ginIn
+func (xc *XaClient) XaGlobalTransaction2(gidIn string, transFunc XaGlobalFunc) (gid string, rerr error) {
+	xa := Xa{IDGenerator: IDGenerator{}, Gid: gidIn}
 	gid = xa.Gid
 	data := &M{
 		"gid":        gid,