dendrite/roomserver/storage/sqlite3/rooms_table.go
Neil Alexander eb352a5f6b
Full roomserver input transactional isolation (#2141)
* Add transaction to all database tables in roomserver, rename latest events updater to room updater, use room updater for all RS input

* Better transaction management

* Tweak order

* Handle cases where the room does not exist

* Other fixes

* More tweaks

* Fill some gaps

* Fill in the gaps

* good lord it gets worse

* Don't roll back transactions when events rejected

* Pass through errors properly

* Fix bugs

* Fix incorrect error check

* Don't panic on nil txns

* Tweaks

* Hopefully fix panics for good in SQLite this time

* Fix rollback

* Minor bug fixes with latest event updater

* Some review comments

* Revert "Some review comments"

This reverts commit 0caf8cf53e.

* Fix a couple of bugs

* Clearer commit and rollback results

* Remove unnecessary prepares
2022-02-04 10:39:34 +00:00

313 lines
9.8 KiB
Go

// Copyright 2017-2018 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"
"encoding/json"
"fmt"
"strings"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/tables"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
)
const roomsSchema = `
CREATE TABLE IF NOT EXISTS roomserver_rooms (
room_nid INTEGER PRIMARY KEY AUTOINCREMENT,
room_id TEXT NOT NULL UNIQUE,
latest_event_nids TEXT NOT NULL DEFAULT '[]',
last_event_sent_nid INTEGER NOT NULL DEFAULT 0,
state_snapshot_nid INTEGER NOT NULL DEFAULT 0,
room_version TEXT NOT NULL
);
`
// Same as insertEventTypeNIDSQL
const insertRoomNIDSQL = `
INSERT INTO roomserver_rooms (room_id, room_version) VALUES ($1, $2)
ON CONFLICT DO NOTHING;
`
const selectRoomNIDSQL = "" +
"SELECT room_nid FROM roomserver_rooms WHERE room_id = $1"
const selectLatestEventNIDsSQL = "" +
"SELECT latest_event_nids, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1"
const selectLatestEventNIDsForUpdateSQL = "" +
"SELECT latest_event_nids, last_event_sent_nid, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1"
const updateLatestEventNIDsSQL = "" +
"UPDATE roomserver_rooms SET latest_event_nids = $1, last_event_sent_nid = $2, state_snapshot_nid = $3 WHERE room_nid = $4"
const selectRoomVersionsForRoomNIDsSQL = "" +
"SELECT room_nid, room_version FROM roomserver_rooms WHERE room_nid IN ($1)"
const selectRoomInfoSQL = "" +
"SELECT room_version, room_nid, state_snapshot_nid, latest_event_nids FROM roomserver_rooms WHERE room_id = $1"
const selectRoomIDsSQL = "" +
"SELECT room_id FROM roomserver_rooms WHERE latest_event_nids != '[]'"
const bulkSelectRoomIDsSQL = "" +
"SELECT room_id FROM roomserver_rooms WHERE room_nid IN ($1)"
const bulkSelectRoomNIDsSQL = "" +
"SELECT room_nid FROM roomserver_rooms WHERE room_id IN ($1)"
type roomStatements struct {
db *sql.DB
insertRoomNIDStmt *sql.Stmt
selectRoomNIDStmt *sql.Stmt
selectLatestEventNIDsStmt *sql.Stmt
selectLatestEventNIDsForUpdateStmt *sql.Stmt
updateLatestEventNIDsStmt *sql.Stmt
//selectRoomVersionForRoomNIDStmt *sql.Stmt
selectRoomInfoStmt *sql.Stmt
selectRoomIDsStmt *sql.Stmt
}
func createRoomsTable(db *sql.DB) error {
_, err := db.Exec(roomsSchema)
return err
}
func prepareRoomsTable(db *sql.DB) (tables.Rooms, error) {
s := &roomStatements{
db: db,
}
return s, sqlutil.StatementList{
{&s.insertRoomNIDStmt, insertRoomNIDSQL},
{&s.selectRoomNIDStmt, selectRoomNIDSQL},
{&s.selectLatestEventNIDsStmt, selectLatestEventNIDsSQL},
{&s.selectLatestEventNIDsForUpdateStmt, selectLatestEventNIDsForUpdateSQL},
{&s.updateLatestEventNIDsStmt, updateLatestEventNIDsSQL},
//{&s.selectRoomVersionForRoomNIDsStmt, selectRoomVersionForRoomNIDsSQL},
{&s.selectRoomInfoStmt, selectRoomInfoSQL},
{&s.selectRoomIDsStmt, selectRoomIDsSQL},
}.Prepare(db)
}
func (s *roomStatements) SelectRoomIDs(ctx context.Context, txn *sql.Tx) ([]string, error) {
stmt := sqlutil.TxStmt(txn, s.selectRoomIDsStmt)
rows, err := stmt.QueryContext(ctx)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectRoomIDsStmt: rows.close() failed")
var roomIDs []string
for rows.Next() {
var roomID string
if err = rows.Scan(&roomID); err != nil {
return nil, err
}
roomIDs = append(roomIDs, roomID)
}
return roomIDs, nil
}
func (s *roomStatements) SelectRoomInfo(ctx context.Context, txn *sql.Tx, roomID string) (*types.RoomInfo, error) {
var info types.RoomInfo
var latestNIDsJSON string
stmt := sqlutil.TxStmt(txn, s.selectRoomInfoStmt)
err := stmt.QueryRowContext(ctx, roomID).Scan(
&info.RoomVersion, &info.RoomNID, &info.StateSnapshotNID, &latestNIDsJSON,
)
if err != nil {
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
var latestNIDs []int64
if err = json.Unmarshal([]byte(latestNIDsJSON), &latestNIDs); err != nil {
return nil, err
}
info.IsStub = len(latestNIDs) == 0
return &info, err
}
func (s *roomStatements) InsertRoomNID(
ctx context.Context, txn *sql.Tx,
roomID string, roomVersion gomatrixserverlib.RoomVersion,
) (roomNID types.RoomNID, err error) {
insertStmt := sqlutil.TxStmt(txn, s.insertRoomNIDStmt)
_, err = insertStmt.ExecContext(ctx, roomID, roomVersion)
if err != nil {
return 0, fmt.Errorf("insertStmt.ExecContext: %w", err)
}
roomNID, err = s.SelectRoomNID(ctx, txn, roomID)
if err != nil {
return 0, fmt.Errorf("s.SelectRoomNID: %w", err)
}
return
}
func (s *roomStatements) SelectRoomNID(
ctx context.Context, txn *sql.Tx, roomID string,
) (types.RoomNID, error) {
var roomNID int64
stmt := sqlutil.TxStmt(txn, s.selectRoomNIDStmt)
err := stmt.QueryRowContext(ctx, roomID).Scan(&roomNID)
return types.RoomNID(roomNID), err
}
func (s *roomStatements) SelectLatestEventNIDs(
ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
) ([]types.EventNID, types.StateSnapshotNID, error) {
var eventNIDs []types.EventNID
var nidsJSON string
var stateSnapshotNID int64
stmt := sqlutil.TxStmt(txn, s.selectLatestEventNIDsStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nidsJSON, &stateSnapshotNID)
if err != nil {
return nil, 0, err
}
if err := json.Unmarshal([]byte(nidsJSON), &eventNIDs); err != nil {
return nil, 0, err
}
return eventNIDs, types.StateSnapshotNID(stateSnapshotNID), nil
}
func (s *roomStatements) SelectLatestEventsNIDsForUpdate(
ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
) ([]types.EventNID, types.EventNID, types.StateSnapshotNID, error) {
var eventNIDs []types.EventNID
var nidsJSON string
var lastEventSentNID int64
var stateSnapshotNID int64
stmt := sqlutil.TxStmt(txn, s.selectLatestEventNIDsForUpdateStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nidsJSON, &lastEventSentNID, &stateSnapshotNID)
if err != nil {
return nil, 0, 0, err
}
if err := json.Unmarshal([]byte(nidsJSON), &eventNIDs); err != nil {
return nil, 0, 0, err
}
return eventNIDs, types.EventNID(lastEventSentNID), types.StateSnapshotNID(stateSnapshotNID), nil
}
func (s *roomStatements) UpdateLatestEventNIDs(
ctx context.Context,
txn *sql.Tx,
roomNID types.RoomNID,
eventNIDs []types.EventNID,
lastEventSentNID types.EventNID,
stateSnapshotNID types.StateSnapshotNID,
) error {
stmt := sqlutil.TxStmt(txn, s.updateLatestEventNIDsStmt)
_, err := stmt.ExecContext(
ctx,
eventNIDsAsArray(eventNIDs),
int64(lastEventSentNID),
int64(stateSnapshotNID),
roomNID,
)
return err
}
func (s *roomStatements) SelectRoomVersionsForRoomNIDs(
ctx context.Context, txn *sql.Tx, roomNIDs []types.RoomNID,
) (map[types.RoomNID]gomatrixserverlib.RoomVersion, error) {
sqlStr := strings.Replace(selectRoomVersionsForRoomNIDsSQL, "($1)", sqlutil.QueryVariadic(len(roomNIDs)), 1)
sqlPrep, err := s.db.Prepare(sqlStr)
if err != nil {
return nil, err
}
sqlPrep = sqlutil.TxStmt(txn, sqlPrep)
iRoomNIDs := make([]interface{}, len(roomNIDs))
for i, v := range roomNIDs {
iRoomNIDs[i] = v
}
rows, err := sqlPrep.QueryContext(ctx, iRoomNIDs...)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectRoomVersionsForRoomNIDsStmt: rows.close() failed")
result := make(map[types.RoomNID]gomatrixserverlib.RoomVersion)
for rows.Next() {
var roomNID types.RoomNID
var roomVersion gomatrixserverlib.RoomVersion
if err = rows.Scan(&roomNID, &roomVersion); err != nil {
return nil, err
}
result[roomNID] = roomVersion
}
return result, nil
}
func (s *roomStatements) BulkSelectRoomIDs(ctx context.Context, txn *sql.Tx, roomNIDs []types.RoomNID) ([]string, error) {
iRoomNIDs := make([]interface{}, len(roomNIDs))
for i, v := range roomNIDs {
iRoomNIDs[i] = v
}
sqlQuery := strings.Replace(bulkSelectRoomIDsSQL, "($1)", sqlutil.QueryVariadic(len(roomNIDs)), 1)
var rows *sql.Rows
var err error
if txn != nil {
rows, err = txn.QueryContext(ctx, sqlQuery, iRoomNIDs...)
} else {
rows, err = s.db.QueryContext(ctx, sqlQuery, iRoomNIDs...)
}
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectRoomIDsStmt: rows.close() failed")
var roomIDs []string
for rows.Next() {
var roomID string
if err = rows.Scan(&roomID); err != nil {
return nil, err
}
roomIDs = append(roomIDs, roomID)
}
return roomIDs, nil
}
func (s *roomStatements) BulkSelectRoomNIDs(ctx context.Context, txn *sql.Tx, roomIDs []string) ([]types.RoomNID, error) {
iRoomIDs := make([]interface{}, len(roomIDs))
for i, v := range roomIDs {
iRoomIDs[i] = v
}
sqlQuery := strings.Replace(bulkSelectRoomNIDsSQL, "($1)", sqlutil.QueryVariadic(len(roomIDs)), 1)
var rows *sql.Rows
var err error
if txn != nil {
rows, err = txn.QueryContext(ctx, sqlQuery, iRoomIDs...)
} else {
rows, err = s.db.QueryContext(ctx, sqlQuery, iRoomIDs...)
}
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectRoomNIDsStmt: rows.close() failed")
var roomNIDs []types.RoomNID
for rows.Next() {
var roomNID types.RoomNID
if err = rows.Scan(&roomNID); err != nil {
return nil, err
}
roomNIDs = append(roomNIDs, roomNID)
}
return roomNIDs, nil
}