dendrite/roomserver/storage/postgres/rooms_table.go
Kegsay b20386123e
Move currentstateserver API to roomserver (#1387)
* Move currentstateserver API to roomserver

Stub out DB functions for now, nothing uses the roomserver version yet.

* Allow it to startup

* Implement some current-state-server storage interface functions

* Add missing package
2020-09-03 17:20:54 +01:00

248 lines
8.5 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"
"errors"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"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 selectRoomVersionForRoomNIDSQL = "" +
"SELECT room_version FROM roomserver_rooms WHERE room_nid = $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"
const bulkSelectRoomIDsSQL = "" +
"SELECT room_id FROM roomserver_rooms WHERE room_nid IN ($1)"
type roomStatements struct {
insertRoomNIDStmt *sql.Stmt
selectRoomNIDStmt *sql.Stmt
selectLatestEventNIDsStmt *sql.Stmt
selectLatestEventNIDsForUpdateStmt *sql.Stmt
updateLatestEventNIDsStmt *sql.Stmt
selectRoomVersionForRoomNIDStmt *sql.Stmt
selectRoomInfoStmt *sql.Stmt
selectRoomIDsStmt *sql.Stmt
bulkSelectRoomIDsStmt *sql.Stmt
}
func NewPostgresRoomsTable(db *sql.DB) (tables.Rooms, error) {
s := &roomStatements{}
_, err := db.Exec(roomsSchema)
if err != nil {
return nil, err
}
return s, shared.StatementList{
{&s.insertRoomNIDStmt, insertRoomNIDSQL},
{&s.selectRoomNIDStmt, selectRoomNIDSQL},
{&s.selectLatestEventNIDsStmt, selectLatestEventNIDsSQL},
{&s.selectLatestEventNIDsForUpdateStmt, selectLatestEventNIDsForUpdateSQL},
{&s.updateLatestEventNIDsStmt, updateLatestEventNIDsSQL},
{&s.selectRoomVersionForRoomNIDStmt, selectRoomVersionForRoomNIDSQL},
{&s.selectRoomInfoStmt, selectRoomInfoSQL},
{&s.selectRoomIDsStmt, selectRoomIDsSQL},
{&s.bulkSelectRoomIDsStmt, bulkSelectRoomIDsSQL},
}.Prepare(db)
}
func (s *roomStatements) SelectRoomIDs(ctx context.Context) ([]string, error) {
rows, err := s.selectRoomIDsStmt.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, roomID string) (*types.RoomInfo, error) {
var info types.RoomInfo
var latestNIDs pq.Int64Array
err := s.selectRoomInfoStmt.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 := 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) SelectRoomVersionForRoomNID(
ctx context.Context, roomNID types.RoomNID,
) (gomatrixserverlib.RoomVersion, error) {
var roomVersion gomatrixserverlib.RoomVersion
err := s.selectRoomVersionForRoomNIDStmt.QueryRowContext(ctx, roomNID).Scan(&roomVersion)
if err == sql.ErrNoRows {
return roomVersion, errors.New("room not found")
}
return roomVersion, err
}
func (s *roomStatements) BulkSelectRoomIDs(ctx context.Context, roomNIDs []types.RoomNID) ([]string, error) {
var array pq.Int64Array
for _, nid := range roomNIDs {
array = append(array, int64(nid))
}
rows, err := s.bulkSelectRoomIDsStmt.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
}