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transaction.go
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transaction.go
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package dbx
import (
"context"
"fmt"
"runtime/debug"
_ "github.com/go-sql-driver/mysql"
"github.com/thoohv5/template/pkg/dbx/standard"
)
const (
intErrCode = 1
dbErrCode = 2
transErrF = "TransError[%d]: %s"
)
type TransError struct {
Code int
Msg string
}
func (t TransError) Error() string {
return fmt.Sprintf(transErrF, t.Code, t.Msg)
}
type Task func(builder standard.IBuilder) error
func errHandler(builder standard.IBuilder, task Task) (err error) {
defer func() {
if e := recover(); e != nil {
msg := fmt.Sprintf("panic: %s\ncalltrace : %s", fmt.Sprint(e), string(debug.Stack()))
err = &TransError{intErrCode, msg}
}
}()
return task(builder)
}
func ExecTrans(ctx context.Context, builder standard.IBuilder, trans ...Task) error {
dber, err := builder.Begin(ctx)
if err != nil {
fmt.Printf("gDB begin transaction failed: %s", err.Error())
return &TransError{dbErrCode, err.Error()}
}
for _, task := range trans {
if err := errHandler(dber, task); err != nil {
if err := dber.Rollback(); err != nil {
fmt.Printf("roll_back : %s", err.Error())
}
return err
}
}
if err := dber.Commit(); err != nil {
_ = dber.Rollback()
return &TransError{dbErrCode, fmt.Sprintf("%v", err.Error())}
}
return nil
}