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dendrite/roomserver/storage/postgres/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

295 lines
10 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 postgres
import (
"context"
"database/sql"
"github.com/lib/pq"
"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 SEQUENCE IF NOT EXISTS roomserver_room_nid_seq;
CREATE TABLE IF NOT EXISTS roomserver_rooms (
-- Local numeric ID for the room.
room_nid BIGINT PRIMARY KEY DEFAULT nextval('roomserver_room_nid_seq'),
-- Textual ID for the room.
room_id TEXT NOT NULL CONSTRAINT roomserver_room_id_unique UNIQUE,
-- The most recent events in the room that aren't referenced by another event.
-- This list may empty if the server hasn't joined the room yet.
-- (The server will be in that state while it stores the events for the initial state of the room)
latest_event_nids BIGINT[] NOT NULL DEFAULT '{}'::BIGINT[],
-- The last event written to the output log for this room.
last_event_sent_nid BIGINT NOT NULL DEFAULT 0,
-- The state of the room after the current set of latest events.
-- This will be 0 if there are no latest events in the room.
state_snapshot_nid BIGINT NOT NULL DEFAULT 0,
-- The version of the room, which will assist in determining the state resolution
-- algorithm, event ID format, etc.
room_version TEXT NOT NULL
);
`
// Same as insertEventTypeNIDSQL
const insertRoomNIDSQL = "" +
"INSERT INTO roomserver_rooms (room_id, room_version) VALUES ($1, $2)" +
" ON CONFLICT ON CONSTRAINT roomserver_room_id_unique" +
" DO NOTHING RETURNING (room_nid)"
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 FOR UPDATE"
const updateLatestEventNIDsSQL = "" +
"UPDATE roomserver_rooms SET latest_event_nids = $2, last_event_sent_nid = $3, state_snapshot_nid = $4 WHERE room_nid = $1"
const selectRoomVersionsForRoomNIDsSQL = "" +
"SELECT room_nid, room_version FROM roomserver_rooms WHERE room_nid = ANY($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 array_length(latest_event_nids, 1) > 0"
const bulkSelectRoomIDsSQL = "" +
"SELECT room_id FROM roomserver_rooms WHERE room_nid = ANY($1)"
const bulkSelectRoomNIDsSQL = "" +
"SELECT room_nid FROM roomserver_rooms WHERE room_id = ANY($1)"
type roomStatements struct {
insertRoomNIDStmt *sql.Stmt
selectRoomNIDStmt *sql.Stmt
selectLatestEventNIDsStmt *sql.Stmt
selectLatestEventNIDsForUpdateStmt *sql.Stmt
updateLatestEventNIDsStmt *sql.Stmt
selectRoomVersionsForRoomNIDsStmt *sql.Stmt
selectRoomInfoStmt *sql.Stmt
selectRoomIDsStmt *sql.Stmt
bulkSelectRoomIDsStmt *sql.Stmt
bulkSelectRoomNIDsStmt *sql.Stmt
}
func createRoomsTable(db *sql.DB) error {
_, err := db.Exec(roomsSchema)
return err
}
func prepareRoomsTable(db *sql.DB) (tables.Rooms, error) {
s := &roomStatements{}
return s, sqlutil.StatementList{
{&s.insertRoomNIDStmt, insertRoomNIDSQL},
{&s.selectRoomNIDStmt, selectRoomNIDSQL},
{&s.selectLatestEventNIDsStmt, selectLatestEventNIDsSQL},
{&s.selectLatestEventNIDsForUpdateStmt, selectLatestEventNIDsForUpdateSQL},
{&s.updateLatestEventNIDsStmt, updateLatestEventNIDsSQL},
{&s.selectRoomVersionsForRoomNIDsStmt, selectRoomVersionsForRoomNIDsSQL},
{&s.selectRoomInfoStmt, selectRoomInfoSQL},
{&s.selectRoomIDsStmt, selectRoomIDsSQL},
{&s.bulkSelectRoomIDsStmt, bulkSelectRoomIDsSQL},
{&s.bulkSelectRoomNIDsStmt, bulkSelectRoomNIDsSQL},
}.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) InsertRoomNID(
ctx context.Context, txn *sql.Tx,
roomID string, roomVersion gomatrixserverlib.RoomVersion,
) (types.RoomNID, error) {
var roomNID int64
stmt := sqlutil.TxStmt(txn, s.insertRoomNIDStmt)
err := stmt.QueryRowContext(ctx, roomID, roomVersion).Scan(&roomNID)
return types.RoomNID(roomNID), err
}
func (s *roomStatements) SelectRoomInfo(ctx context.Context, txn *sql.Tx, roomID string) (*types.RoomInfo, error) {
var info types.RoomInfo
var latestNIDs pq.Int64Array
stmt := sqlutil.TxStmt(txn, s.selectRoomInfoStmt)
err := stmt.QueryRowContext(ctx, roomID).Scan(
&info.RoomVersion, &info.RoomNID, &info.StateSnapshotNID, &latestNIDs,
)
if err == sql.ErrNoRows {
return nil, nil
}
info.IsStub = len(latestNIDs) == 0
return &info, err
}
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 nids pq.Int64Array
var stateSnapshotNID int64
stmt := sqlutil.TxStmt(txn, s.selectLatestEventNIDsStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nids, &stateSnapshotNID)
if err != nil {
return nil, 0, err
}
eventNIDs := make([]types.EventNID, len(nids))
for i := range nids {
eventNIDs[i] = types.EventNID(nids[i])
}
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 nids pq.Int64Array
var lastEventSentNID int64
var stateSnapshotNID int64
stmt := sqlutil.TxStmt(txn, s.selectLatestEventNIDsForUpdateStmt)
err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nids, &lastEventSentNID, &stateSnapshotNID)
if err != nil {
return nil, 0, 0, err
}
eventNIDs := make([]types.EventNID, len(nids))
for i := range nids {
eventNIDs[i] = types.EventNID(nids[i])
}
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,
roomNID,
eventNIDsAsArray(eventNIDs),
int64(lastEventSentNID),
int64(stateSnapshotNID),
)
return err
}
func (s *roomStatements) SelectRoomVersionsForRoomNIDs(
ctx context.Context, txn *sql.Tx, roomNIDs []types.RoomNID,
) (map[types.RoomNID]gomatrixserverlib.RoomVersion, error) {
stmt := sqlutil.TxStmt(txn, s.selectRoomVersionsForRoomNIDsStmt)
rows, err := stmt.QueryContext(ctx, roomNIDsAsArray(roomNIDs))
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) {
var array pq.Int64Array
for _, nid := range roomNIDs {
array = append(array, int64(nid))
}
stmt := sqlutil.TxStmt(txn, s.bulkSelectRoomIDsStmt)
rows, err := stmt.QueryContext(ctx, array)
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) {
var array pq.StringArray
for _, roomID := range roomIDs {
array = append(array, roomID)
}
stmt := sqlutil.TxStmt(txn, s.bulkSelectRoomNIDsStmt)
rows, err := stmt.QueryContext(ctx, array)
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
}
func roomNIDsAsArray(roomNIDs []types.RoomNID) pq.Int64Array {
nids := make([]int64, len(roomNIDs))
for i := range roomNIDs {
nids[i] = int64(roomNIDs[i])
}
return nids
}