update barrier return value

dtmcli/barrier.go

@@ -72,6 +72,7 @@ func ThroughBarrierCall(db *sql.DB, transInfo *TransInfo, busiCall BusiFunc) (re
 	originAffected, _ := insertBarrier(tx, transInfo.TransType, transInfo.Gid, transInfo.BranchID, originType)
 	currentAffected, rerr := insertBarrier(tx, transInfo.TransType, transInfo.Gid, transInfo.BranchID, transInfo.TransType)
 	if currentAffected == 0 || (originType == "cancel" || originType == "compensate") && originAffected > 0 {
+		res = "SUCCESS" // 如果被忽略，那么直接返回 "SUCCESS"，表示成功，可以进行下一步
 		return
 	}
 	res, rerr = busiCall(db)

examples/main_saga_barrier.go

@@ -32,11 +32,7 @@ func SagaBarrierStartSvr() {
 
 func SagaBarrierFireRequest() {
 	logrus.Printf("a busi transaction begin")
-	req := &TransReq{
-		Amount:         30,
-		TransInResult:  "SUCCESS",
-		TransOutResult: "SUCCESS",
-	}
+	req := &TransReq{Amount: 30}
 	saga := dtmcli.NewSaga(DtmServer).
 		Add(SagaBarrierBusi+"/TransOut", SagaBarrierBusi+"/TransOutCompensate", req).
 		Add(SagaBarrierBusi+"/TransIn", SagaBarrierBusi+"/TransInCompensate", req)