197 lines
6.9 KiB
Go
197 lines
6.9 KiB
Go
// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package postgres
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import (
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"context"
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"database/sql"
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"errors"
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"github.com/lib/pq"
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"github.com/matrix-org/dendrite/common"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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)
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const roomsSchema = `
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CREATE SEQUENCE IF NOT EXISTS roomserver_room_nid_seq;
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CREATE TABLE IF NOT EXISTS roomserver_rooms (
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-- Local numeric ID for the room.
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room_nid BIGINT PRIMARY KEY DEFAULT nextval('roomserver_room_nid_seq'),
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-- Textual ID for the room.
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room_id TEXT NOT NULL CONSTRAINT roomserver_room_id_unique UNIQUE,
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-- The most recent events in the room that aren't referenced by another event.
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-- This list may empty if the server hasn't joined the room yet.
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-- (The server will be in that state while it stores the events for the initial state of the room)
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latest_event_nids BIGINT[] NOT NULL DEFAULT '{}'::BIGINT[],
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-- The last event written to the output log for this room.
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last_event_sent_nid BIGINT NOT NULL DEFAULT 0,
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-- The state of the room after the current set of latest events.
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-- This will be 0 if there are no latest events in the room.
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state_snapshot_nid BIGINT NOT NULL DEFAULT 0,
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-- The version of the room, which will assist in determining the state resolution
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-- algorithm, event ID format, etc.
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room_version TEXT NOT NULL
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);
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`
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// Same as insertEventTypeNIDSQL
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const insertRoomNIDSQL = "" +
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"INSERT INTO roomserver_rooms (room_id, room_version) VALUES ($1, $2)" +
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" ON CONFLICT ON CONSTRAINT roomserver_room_id_unique" +
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" DO NOTHING RETURNING (room_nid)"
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const selectRoomNIDSQL = "" +
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"SELECT room_nid FROM roomserver_rooms WHERE room_id = $1"
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const selectLatestEventNIDsSQL = "" +
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"SELECT latest_event_nids, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1"
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const selectLatestEventNIDsForUpdateSQL = "" +
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"SELECT latest_event_nids, last_event_sent_nid, state_snapshot_nid FROM roomserver_rooms WHERE room_nid = $1 FOR UPDATE"
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const updateLatestEventNIDsSQL = "" +
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"UPDATE roomserver_rooms SET latest_event_nids = $2, last_event_sent_nid = $3, state_snapshot_nid = $4 WHERE room_nid = $1"
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const selectRoomVersionForRoomIDSQL = "" +
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"SELECT room_version FROM roomserver_rooms WHERE room_id = $1"
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const selectRoomVersionForRoomNIDSQL = "" +
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"SELECT room_version FROM roomserver_rooms WHERE room_nid = $1"
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type roomStatements struct {
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insertRoomNIDStmt *sql.Stmt
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selectRoomNIDStmt *sql.Stmt
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selectLatestEventNIDsStmt *sql.Stmt
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selectLatestEventNIDsForUpdateStmt *sql.Stmt
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updateLatestEventNIDsStmt *sql.Stmt
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selectRoomVersionForRoomIDStmt *sql.Stmt
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selectRoomVersionForRoomNIDStmt *sql.Stmt
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}
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func (s *roomStatements) prepare(db *sql.DB) (err error) {
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_, err = db.Exec(roomsSchema)
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if err != nil {
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return
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}
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return statementList{
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{&s.insertRoomNIDStmt, insertRoomNIDSQL},
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{&s.selectRoomNIDStmt, selectRoomNIDSQL},
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{&s.selectLatestEventNIDsStmt, selectLatestEventNIDsSQL},
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{&s.selectLatestEventNIDsForUpdateStmt, selectLatestEventNIDsForUpdateSQL},
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{&s.updateLatestEventNIDsStmt, updateLatestEventNIDsSQL},
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{&s.selectRoomVersionForRoomIDStmt, selectRoomVersionForRoomIDSQL},
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{&s.selectRoomVersionForRoomNIDStmt, selectRoomVersionForRoomNIDSQL},
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}.prepare(db)
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}
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func (s *roomStatements) insertRoomNID(
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ctx context.Context, txn *sql.Tx,
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roomID string, roomVersion gomatrixserverlib.RoomVersion,
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) (types.RoomNID, error) {
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var roomNID int64
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stmt := common.TxStmt(txn, s.insertRoomNIDStmt)
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err := stmt.QueryRowContext(ctx, roomID, roomVersion).Scan(&roomNID)
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return types.RoomNID(roomNID), err
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}
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func (s *roomStatements) selectRoomNID(
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ctx context.Context, txn *sql.Tx, roomID string,
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) (types.RoomNID, error) {
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var roomNID int64
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stmt := common.TxStmt(txn, s.selectRoomNIDStmt)
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err := stmt.QueryRowContext(ctx, roomID).Scan(&roomNID)
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return types.RoomNID(roomNID), err
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}
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func (s *roomStatements) selectLatestEventNIDs(
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ctx context.Context, roomNID types.RoomNID,
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) ([]types.EventNID, types.StateSnapshotNID, error) {
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var nids pq.Int64Array
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var stateSnapshotNID int64
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stmt := s.selectLatestEventNIDsStmt
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err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nids, &stateSnapshotNID)
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if err != nil {
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return nil, 0, err
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}
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eventNIDs := make([]types.EventNID, len(nids))
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for i := range nids {
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eventNIDs[i] = types.EventNID(nids[i])
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}
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return eventNIDs, types.StateSnapshotNID(stateSnapshotNID), nil
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}
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func (s *roomStatements) selectLatestEventsNIDsForUpdate(
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ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
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) ([]types.EventNID, types.EventNID, types.StateSnapshotNID, error) {
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var nids pq.Int64Array
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var lastEventSentNID int64
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var stateSnapshotNID int64
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stmt := common.TxStmt(txn, s.selectLatestEventNIDsForUpdateStmt)
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err := stmt.QueryRowContext(ctx, int64(roomNID)).Scan(&nids, &lastEventSentNID, &stateSnapshotNID)
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if err != nil {
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return nil, 0, 0, err
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}
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eventNIDs := make([]types.EventNID, len(nids))
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for i := range nids {
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eventNIDs[i] = types.EventNID(nids[i])
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}
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return eventNIDs, types.EventNID(lastEventSentNID), types.StateSnapshotNID(stateSnapshotNID), nil
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}
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func (s *roomStatements) updateLatestEventNIDs(
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ctx context.Context,
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txn *sql.Tx,
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roomNID types.RoomNID,
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eventNIDs []types.EventNID,
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lastEventSentNID types.EventNID,
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stateSnapshotNID types.StateSnapshotNID,
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) error {
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stmt := common.TxStmt(txn, s.updateLatestEventNIDsStmt)
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_, err := stmt.ExecContext(
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ctx,
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roomNID,
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eventNIDsAsArray(eventNIDs),
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int64(lastEventSentNID),
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int64(stateSnapshotNID),
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)
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return err
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}
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func (s *roomStatements) selectRoomVersionForRoomID(
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ctx context.Context, txn *sql.Tx, roomID string,
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) (gomatrixserverlib.RoomVersion, error) {
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var roomVersion gomatrixserverlib.RoomVersion
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stmt := common.TxStmt(txn, s.selectRoomVersionForRoomIDStmt)
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err := stmt.QueryRowContext(ctx, roomID).Scan(&roomVersion)
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if err == sql.ErrNoRows {
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return roomVersion, errors.New("room not found")
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}
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return roomVersion, err
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}
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func (s *roomStatements) selectRoomVersionForRoomNID(
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ctx context.Context, txn *sql.Tx, roomNID types.RoomNID,
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) (gomatrixserverlib.RoomVersion, error) {
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var roomVersion gomatrixserverlib.RoomVersion
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stmt := common.TxStmt(txn, s.selectRoomVersionForRoomNIDStmt)
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err := stmt.QueryRowContext(ctx, roomNID).Scan(&roomVersion)
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if err == sql.ErrNoRows {
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return roomVersion, errors.New("room not found")
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}
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return roomVersion, err
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}
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