/
executor.go
65 lines (57 loc) · 889 Bytes
/
executor.go
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package main
import (
"database/sql"
"sync"
"github.com/pingcap/errors"
)
type Executor struct {
sync.Mutex
db *sql.DB
txn *sql.Tx
}
type IExec interface {
Exec(query string, args ...interface{}) (sql.Result, error)
}
func (e *Executor) Begin() error {
e.Lock()
defer e.Unlock()
if e.txn != nil {
return nil
}
txn, err := e.db.Begin()
if err != nil {
return errors.Trace(err)
}
e.txn = txn
return nil
}
func (e *Executor) Commit() error {
e.Lock()
defer func() {
e.txn = nil
e.Unlock()
}()
if e.txn == nil {
return nil
}
return errors.Trace(e.txn.Commit())
}
func (e *Executor) Rollback() error {
e.Lock()
defer func() {
e.txn = nil
e.Unlock()
}()
if e.txn == nil {
return nil
}
return errors.Trace(e.txn.Rollback())
}
func (e *Executor) GetExec() IExec {
e.Lock()
defer e.Unlock()
if e.txn != nil {
return e.txn
}
return e.db
}