gotosocial/internal/db/bundb/session.go
kim 5f3e095717
[performance] retry db queries on busy errors (#2025)
* catch SQLITE_BUSY errors, wrap bun.DB to use our own busy retrier, remove unnecessary db.Error type

Signed-off-by: kim <grufwub@gmail.com>

* remove dead code

Signed-off-by: kim <grufwub@gmail.com>

* remove more dead code, add missing error arguments

Signed-off-by: kim <grufwub@gmail.com>

* update sqlite to use maxOpenConns()

Signed-off-by: kim <grufwub@gmail.com>

* add uncommitted changes

Signed-off-by: kim <grufwub@gmail.com>

* use direct calls-through for the ConnIface to make sure we don't double query hook

Signed-off-by: kim <grufwub@gmail.com>

* expose underlying bun.DB better

Signed-off-by: kim <grufwub@gmail.com>

* retry on the correct busy error

Signed-off-by: kim <grufwub@gmail.com>

* use longer possible maxRetries for db retry-backoff

Signed-off-by: kim <grufwub@gmail.com>

* remove the note regarding max-open-conns only applying to postgres

Signed-off-by: kim <grufwub@gmail.com>

* improved code commenting

Signed-off-by: kim <grufwub@gmail.com>

* remove unnecessary infof call (just use info)

Signed-off-by: kim <grufwub@gmail.com>

* rename DBConn to WrappedDB to better follow sql package name conventions

Signed-off-by: kim <grufwub@gmail.com>

* update test error string checks

Signed-off-by: kim <grufwub@gmail.com>

* shush linter

Signed-off-by: kim <grufwub@gmail.com>

* update backoff logic to be more transparent

Signed-off-by: kim <grufwub@gmail.com>

---------

Signed-off-by: kim <grufwub@gmail.com>
2023-07-25 10:34:05 +02:00

77 lines
1.9 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package bundb
import (
"context"
"crypto/rand"
"io"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
)
type sessionDB struct {
db *WrappedDB
}
func (s *sessionDB) GetSession(ctx context.Context) (*gtsmodel.RouterSession, error) {
rss := make([]*gtsmodel.RouterSession, 0, 1)
// get the first router session in the db or...
if err := s.db.
NewSelect().
Model(&rss).
Limit(1).
Order("router_session.id DESC").
Scan(ctx); err != nil {
return nil, s.db.ProcessError(err)
}
// ... create a new one
if len(rss) == 0 {
return s.createSession(ctx)
}
return rss[0], nil
}
func (s *sessionDB) createSession(ctx context.Context) (*gtsmodel.RouterSession, error) {
buf := make([]byte, 64)
auth := buf[:32]
crypt := buf[32:64]
if _, err := io.ReadFull(rand.Reader, buf); err != nil {
return nil, err
}
rs := &gtsmodel.RouterSession{
ID: id.NewULID(),
Auth: auth,
Crypt: crypt,
}
if _, err := s.db.
NewInsert().
Model(rs).
Exec(ctx); err != nil {
return nil, s.db.ProcessError(err)
}
return rs, nil
}