57 lines
1.8 KiB
Go
57 lines
1.8 KiB
Go
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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)
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// XaClient XA client connection
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var XaClient *dtmcli.XaClient = nil
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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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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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res, err := XaClient.XaGlobalTransaction(gid, func(xa *dtmcli.Xa) (interface{}, error) {
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req := &TransReq{Amount: 30}
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resp, err := xa.CallBranch(req, Busi+"/TransOutXa")
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if dtmcli.IsFailure(resp, err) {
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return resp, err
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}
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return xa.CallBranch(req, Busi+"/TransInXa")
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})
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dtmcli.PanicIfFailure(res, 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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return XaClient.XaLocalTransaction(c, func(db *sql.DB, xa *dtmcli.Xa) (interface{}, error) {
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if reqFrom(c).TransInResult == "FAILURE" {
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return M{"dtm_result": "FAILURE"}, nil
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}
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_, err := common.SdbExec(db, "update dtm_busi.user_account set balance=balance+? where user_id=?", reqFrom(c).Amount, 2)
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return M{"dtm_result": "SUCCESS"}, err
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})
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}
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func xaTransOut(c *gin.Context) (interface{}, error) {
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return XaClient.XaLocalTransaction(c, func(db *sql.DB, xa *dtmcli.Xa) (interface{}, error) {
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if reqFrom(c).TransOutResult == "FAILURE" {
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return M{"dtm_result": "FAILURE"}, nil
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}
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_, err := common.SdbExec(db, "update dtm_busi.user_account set balance=balance-? where user_id=?", reqFrom(c).Amount, 1)
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return M{"dtm_result": "SUCCESS"}, err
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})
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}
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