108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
package examples
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import (
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"fmt"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/yedf/dtm/common"
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"github.com/yedf/dtm/dtmcli"
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)
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// XaClient XA client connection
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var XaClient *dtmcli.XaClient = nil
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// UserAccount busi model
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type UserAccount struct {
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common.ModelBase
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UserID int
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Balance string
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}
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// TableName gorm table name
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func (u *UserAccount) TableName() string { return "user_account" }
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// UserAccountTrading freeze user account table
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type UserAccountTrading struct {
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common.ModelBase
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UserID int
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TradingBalance string
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}
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// TableName gorm table name
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func (u *UserAccountTrading) TableName() string { return "user_account_trading" }
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func dbGet() *common.DB {
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return common.DbGet(config.DB)
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}
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// XaSetup 挂载http的api，创建XaClient
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func XaSetup(app *gin.Engine) {
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app.POST(BusiAPI+"/TransInXa", common.WrapHandler(xaTransIn))
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app.POST(BusiAPI+"/TransOutXa", common.WrapHandler(xaTransOut))
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config.DB["database"] = "dtm_busi"
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var err error
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XaClient, err = dtmcli.NewXaClient(DtmServer, config.DB, app, Busi+"/xa")
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e2p(err)
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}
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// XaFireRequest 注册全局XA事务，调用XA的分支
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func XaFireRequest() string {
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gid := dtmcli.MustGenGid(DtmServer)
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err := XaClient.XaGlobalTransaction(gid, func(xa *dtmcli.Xa) (rerr error) {
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defer common.P2E(&rerr)
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req := &TransReq{Amount: 30}
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resp, err := xa.CallBranch(req, Busi+"/TransOutXa")
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common.CheckRestySuccess(resp, err)
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resp, err = xa.CallBranch(req, Busi+"/TransInXa")
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common.CheckRestySuccess(resp, err)
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return nil
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})
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e2p(err)
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return gid
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}
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func xaTransIn(c *gin.Context) (interface{}, error) {
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err := XaClient.XaLocalTransaction(c, func(db *common.DB, xa *dtmcli.Xa) (rerr error) {
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req := reqFrom(c)
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if req.TransInResult == "FAILURE" {
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return fmt.Errorf("tranIn FAILURE")
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}
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dbr := db.Exec("update user_account set balance=balance+? where user_id=?", req.Amount, 2)
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return dbr.Error
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})
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if err != nil && strings.Contains(err.Error(), "FAILURE") {
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return M{"dtm_result": "FAILURE"}, nil
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}
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e2p(err)
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return M{"dtm_result": "SUCCESS"}, nil
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}
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func xaTransOut(c *gin.Context) (interface{}, error) {
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err := XaClient.XaLocalTransaction(c, func(db *common.DB, xa *dtmcli.Xa) (rerr error) {
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req := reqFrom(c)
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if req.TransOutResult == "FAILURE" {
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return fmt.Errorf("tranOut failed")
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}
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dbr := db.Exec("update user_account set balance=balance-? where user_id=?", req.Amount, 1)
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return dbr.Error
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})
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e2p(err)
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return M{"dtm_result": "SUCCESS"}, nil
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}
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// ResetXaData 1
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func ResetXaData() {
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db := dbGet()
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db.Must().Exec("truncate user_account")
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db.Must().Exec("insert into user_account (user_id, balance) values (1, 10000), (2, 10000)")
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type XaRow struct {
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Data string
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}
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xas := []XaRow{}
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db.Must().Raw("xa recover").Scan(&xas)
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for _, xa := range xas {
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db.Must().Exec(fmt.Sprintf("xa rollback '%s'", xa.Data))
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}
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}
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