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package main
// bff backend for frontend
import (
"github.com/dtm-labs/client/dtmcli"
"log"
)
const dtmServer = "http://192.168.177.131:36789/api/dtmsvr"
const orderServer = "http://192.168.177.1:8081"
const storageServer = "http://192.168.177.1:8082"
type Req struct {
Quantity int ` json:"quantity,omitempty" `
Id int ` json:"id,omitempty" `
TxId string ` json:"tx_id,omitempty" `
}
// 确认订单
func main ( ) {
// dtmcli 客户端
// 生成分布式事务id，
gid := dtmcli . MustGenGid ( dtmServer ) // global id
// 启动 saga 事务
// 提供操作的必要数据
// 1 订单管理，正向业务逻辑，逆向补偿操作
// 2 库存管理，正向扣减库存，逆向补偿操作追回库存
req := Req { 20 , 3 , gid }
saga := dtmcli . NewSaga ( dtmServer , gid ) .
Add ( orderServer + "/order-create" , orderServer + "/order-create-compensate" , req ) . // 增加一个order本地事务
Add ( storageServer + "/deduct" , storageServer + "/deduct-compensate" , req )
// 提交saga事务
err := saga . Submit ( )
if err != nil {
log . Fatalln ( err )
}
log . Println ( "Ensure Order Completed." )
}
