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43 lines
1.3 KiB
43 lines
1.3 KiB
/*
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* Copyright (c) 2021 yedf. All rights reserved.
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* Use of this source code is governed by a BSD-style
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* license that can be found in the LICENSE file.
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*/
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package examples
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import (
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"database/sql"
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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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"github.com/yedf/dtm/dtmcli/dtmimp"
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)
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func init() {
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setupFuncs["SagaGormBarrierSetup"] = func(app *gin.Engine) {
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app.POST(BusiAPI+"/SagaBTransOutGorm", common.WrapHandler(sagaGormBarrierTransOut))
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}
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addSample("saga_gorm_barrier", func() string {
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dtmimp.Logf("a busi transaction begin")
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req := &TransReq{Amount: 30}
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saga := dtmcli.NewSaga(DtmHttpServer, dtmcli.MustGenGid(DtmHttpServer)).
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Add(Busi+"/SagaBTransOutGorm", Busi+"/SagaBTransOutCompensate", req).
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Add(Busi+"/SagaBTransIn", Busi+"/SagaBTransInCompensate", req)
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dtmimp.Logf("busi trans submit")
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err := saga.Submit()
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dtmimp.FatalIfError(err)
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return saga.Gid
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})
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}
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func sagaGormBarrierTransOut(c *gin.Context) (interface{}, error) {
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req := reqFrom(c)
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barrier := MustBarrierFromGin(c)
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tx := dbGet().DB.Begin()
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return dtmcli.MapSuccess, barrier.Call(tx.Statement.ConnPool.(*sql.Tx), func(tx1 *sql.Tx) error {
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return tx.Exec("update dtm_busi.user_account set balance = balance + ? where user_id = ?", -req.Amount, 2).Error
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})
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}
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