mirror of
https://github.com/grafana/grafana.git
synced 2024-11-28 03:34:15 -06:00
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
package sqlstore
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"time"
|
|
|
|
"github.com/grafana/grafana/pkg/bus"
|
|
"github.com/grafana/grafana/pkg/infra/log"
|
|
"github.com/grafana/grafana/pkg/util/errutil"
|
|
"github.com/mattn/go-sqlite3"
|
|
"xorm.io/xorm"
|
|
)
|
|
|
|
// WithTransactionalDbSession calls the callback with a session within a transaction.
|
|
func (ss *SQLStore) WithTransactionalDbSession(ctx context.Context, callback dbTransactionFunc) error {
|
|
return inTransactionWithRetryCtx(ctx, ss.engine, callback, 0)
|
|
}
|
|
|
|
func (ss *SQLStore) InTransaction(ctx context.Context, fn func(ctx context.Context) error) error {
|
|
return ss.inTransactionWithRetry(ctx, fn, 0)
|
|
}
|
|
|
|
func (ss *SQLStore) inTransactionWithRetry(ctx context.Context, fn func(ctx context.Context) error, retry int) error {
|
|
return inTransactionWithRetryCtx(ctx, ss.engine, func(sess *DBSession) error {
|
|
withValue := context.WithValue(ctx, ContextSessionKey{}, sess)
|
|
return fn(withValue)
|
|
}, retry)
|
|
}
|
|
|
|
func inTransactionWithRetry(callback dbTransactionFunc, retry int) error {
|
|
return inTransactionWithRetryCtx(context.Background(), x, callback, retry)
|
|
}
|
|
|
|
func inTransactionWithRetryCtx(ctx context.Context, engine *xorm.Engine, callback dbTransactionFunc, retry int) error {
|
|
sess, err := startSession(ctx, engine, true)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer sess.Close()
|
|
|
|
err = callback(sess)
|
|
|
|
// special handling of database locked errors for sqlite, then we can retry 5 times
|
|
var sqlError sqlite3.Error
|
|
if errors.As(err, &sqlError) && retry < 5 && (sqlError.Code == sqlite3.ErrLocked || sqlError.Code == sqlite3.ErrBusy) {
|
|
if rollErr := sess.Rollback(); rollErr != nil {
|
|
return errutil.Wrapf(err, "Rolling back transaction due to error failed: %s", rollErr)
|
|
}
|
|
|
|
time.Sleep(time.Millisecond * time.Duration(10))
|
|
sqlog.Info("Database locked, sleeping then retrying", "error", err, "retry", retry)
|
|
return inTransactionWithRetry(callback, retry+1)
|
|
}
|
|
|
|
if err != nil {
|
|
if rollErr := sess.Rollback(); rollErr != nil {
|
|
return errutil.Wrapf(err, "Rolling back transaction due to error failed: %s", rollErr)
|
|
}
|
|
return err
|
|
}
|
|
if err := sess.Commit(); err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(sess.events) > 0 {
|
|
for _, e := range sess.events {
|
|
if err = bus.Publish(e); err != nil {
|
|
log.Errorf(3, "Failed to publish event after commit. error: %v", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func inTransaction(callback dbTransactionFunc) error {
|
|
return inTransactionWithRetry(callback, 0)
|
|
}
|
|
|
|
func inTransactionCtx(ctx context.Context, callback dbTransactionFunc) error {
|
|
return inTransactionWithRetryCtx(ctx, x, callback, 0)
|
|
}
|