mirror of
https://github.com/matrix-org/dendrite
synced 2024-11-15 22:31:07 +01:00
f18001ecbb
The update part wasn't executed actually for SQLite, so it is moved to a separate statement. Fixes #1852. Signed-off-by: Bohdan Horbeshko <bodqhrohro@gmail.com>
82 lines
2 KiB
Go
82 lines
2 KiB
Go
// Copyright 2018 New Vector Ltd
|
|
// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package sqlite3
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/matrix-org/dendrite/internal/sqlutil"
|
|
)
|
|
|
|
const txnIDSchema = `
|
|
-- Keeps a count of the current transaction ID
|
|
CREATE TABLE IF NOT EXISTS appservice_counters (
|
|
name TEXT PRIMARY KEY NOT NULL,
|
|
last_id INTEGER DEFAULT 1
|
|
);
|
|
INSERT OR IGNORE INTO appservice_counters (name, last_id) VALUES('txn_id', 1);
|
|
`
|
|
|
|
const selectTxnIDSQL = `
|
|
SELECT last_id FROM appservice_counters WHERE name='txn_id'
|
|
`
|
|
|
|
const updateTxnIDSQL = `
|
|
UPDATE appservice_counters SET last_id=last_id+1 WHERE name='txn_id'
|
|
`
|
|
|
|
type txnStatements struct {
|
|
db *sql.DB
|
|
writer sqlutil.Writer
|
|
selectTxnIDStmt *sql.Stmt
|
|
updateTxnIDStmt *sql.Stmt
|
|
}
|
|
|
|
func (s *txnStatements) prepare(db *sql.DB, writer sqlutil.Writer) (err error) {
|
|
s.db = db
|
|
s.writer = writer
|
|
_, err = db.Exec(txnIDSchema)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if s.selectTxnIDStmt, err = db.Prepare(selectTxnIDSQL); err != nil {
|
|
return
|
|
}
|
|
|
|
if s.updateTxnIDStmt, err = db.Prepare(updateTxnIDSQL); err != nil {
|
|
return
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// selectTxnID selects the latest ascending transaction ID
|
|
func (s *txnStatements) selectTxnID(
|
|
ctx context.Context,
|
|
) (txnID int, err error) {
|
|
err = s.writer.Do(s.db, nil, func(txn *sql.Tx) error {
|
|
err := s.selectTxnIDStmt.QueryRowContext(ctx).Scan(&txnID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = s.updateTxnIDStmt.ExecContext(ctx)
|
|
return err
|
|
})
|
|
return
|
|
}
|