106 lines
3.0 KiB
Go
106 lines
3.0 KiB
Go
package examples
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import (
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"fmt"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/sirupsen/logrus"
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"github.com/yedf/dtm"
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"github.com/yedf/dtm/common"
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)
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// 事务参与者的服务地址
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const SagaBusiPort = 8081
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const SagaBusiApi = "/api/busi_saga"
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var SagaBusi = fmt.Sprintf("http://localhost:%d%s", SagaBusiPort, SagaBusiApi)
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func SagaMain() {
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go SagaStartSvr()
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sagaFireRequest()
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time.Sleep(1000 * time.Second)
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}
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func SagaStartSvr() {
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logrus.Printf("saga examples starting")
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app := common.GetGinApp()
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SagaAddRoute(app)
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app.Run(fmt.Sprintf(":%d", SagaBusiPort))
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}
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func sagaFireRequest() {
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gid := common.GenGid()
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logrus.Printf("busi transaction begin: %s", gid)
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req := &TransReq{
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Amount: 30,
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TransInResult: "SUCCESS",
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TransOutResult: "SUCCESS",
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}
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saga := dtm.SagaNew(DtmServer, gid)
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saga.Add(SagaBusi+"/TransOut", SagaBusi+"/TransOutCompensate", req)
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saga.Add(SagaBusi+"/TransIn", SagaBusi+"/TransInCompensate", req)
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err := saga.Prepare(SagaBusi + "/TransQuery")
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e2p(err)
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logrus.Printf("busi trans commit")
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err = saga.Commit()
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e2p(err)
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}
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// api
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func SagaAddRoute(app *gin.Engine) {
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app.POST(SagaBusiApi+"/TransIn", common.WrapHandler(sagaTransIn))
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app.POST(SagaBusiApi+"/TransInCompensate", common.WrapHandler(sagaTransInCompensate))
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app.POST(SagaBusiApi+"/TransOut", common.WrapHandler(SagaTransOut))
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app.POST(SagaBusiApi+"/TransOutCompensate", common.WrapHandler(sagaTransOutCompensate))
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app.GET(SagaBusiApi+"/TransQuery", common.WrapHandler(sagaTransQuery))
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logrus.Printf("examples listening at %d", SagaBusiPort)
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}
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var SagaTransInResult = ""
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var SagaTransOutResult = ""
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var SagaTransInCompensateResult = ""
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var SagaTransOutCompensateResult = ""
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var SagaTransQueryResult = ""
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func sagaTransIn(c *gin.Context) (interface{}, error) {
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gid := c.Query("gid")
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req := transReqFromContext(c)
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res := common.OrString(SagaTransInResult, req.TransInResult, "SUCCESS")
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logrus.Printf("%s TransIn: %v result: %s", gid, req, res)
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return M{"result": res}, nil
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}
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func sagaTransInCompensate(c *gin.Context) (interface{}, error) {
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gid := c.Query("gid")
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req := transReqFromContext(c)
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res := common.OrString(SagaTransInCompensateResult, "SUCCESS")
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logrus.Printf("%s TransInCompensate: %v result: %s", gid, req, res)
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return M{"result": res}, nil
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}
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func SagaTransOut(c *gin.Context) (interface{}, error) {
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gid := c.Query("gid")
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req := transReqFromContext(c)
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res := common.OrString(SagaTransOutResult, req.TransOutResult, "SUCCESS")
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logrus.Printf("%s TransOut: %v result: %s", gid, req, res)
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return M{"result": res}, nil
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}
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func sagaTransOutCompensate(c *gin.Context) (interface{}, error) {
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gid := c.Query("gid")
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req := transReqFromContext(c)
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res := common.OrString(SagaTransOutCompensateResult, "SUCCESS")
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logrus.Printf("%s TransOutCompensate: %v result: %s", gid, req, res)
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return M{"result": res}, nil
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}
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func sagaTransQuery(c *gin.Context) (interface{}, error) {
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gid := c.Query("gid")
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logrus.Printf("%s TransQuery", gid)
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res := common.OrString(SagaTransQueryResult, "SUCCESS")
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return M{"result": res}, nil
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}
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