61 lines
2.0 KiB
Go
61 lines
2.0 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/go-resty/resty/v2"
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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, Busi+"/xa", func(path string, xa *dtmcli.XaClient) {
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app.POST(path, common.WrapHandler(func(c *gin.Context) (interface{}, error) {
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return xa.HandleCallback(c.Query("gid"), c.Query("branch_id"), c.Query("action"))
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}))
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})
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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) (*resty.Response, error) {
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resp, err := xa.CallBranch(&TransReq{Amount: 30}, Busi+"/TransOutXa")
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if err != nil {
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return resp, err
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}
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return xa.CallBranch(&TransReq{Amount: 30}, Busi+"/TransInXa")
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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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return XaClient.XaLocalTransaction(c.Request.URL.Query(), func(db *sql.DB, xa *dtmcli.Xa) (interface{}, error) {
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if reqFrom(c).TransInResult == "FAILURE" {
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return dtmcli.ResultFailure, nil
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}
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_, err := dtmcli.SdbExec(db, "update dtm_busi.user_account set balance=balance+? where user_id=?", reqFrom(c).Amount, 2)
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return dtmcli.ResultSuccess, 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.Request.URL.Query(), func(db *sql.DB, xa *dtmcli.Xa) (interface{}, error) {
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if reqFrom(c).TransOutResult == "FAILURE" {
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return dtmcli.ResultFailure, nil
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}
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_, err := dtmcli.SdbExec(db, "update dtm_busi.user_account set balance=balance-? where user_id=?", reqFrom(c).Amount, 1)
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return dtmcli.ResultSuccess, err
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})
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}
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