dendrite/roomserver/storage/postgres/published_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

107 lines
3.1 KiB
Go

// Copyright 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/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/tables"
)
const publishedSchema = `
-- Stores which rooms are published in the room directory
CREATE TABLE IF NOT EXISTS roomserver_published (
-- The room ID of the room
room_id TEXT NOT NULL PRIMARY KEY,
-- Whether it is published or not
published BOOLEAN NOT NULL DEFAULT false
);
`
const upsertPublishedSQL = "" +
"INSERT INTO roomserver_published (room_id, published) VALUES ($1, $2) " +
"ON CONFLICT (room_id) DO UPDATE SET published=$2"
const selectAllPublishedSQL = "" +
"SELECT room_id FROM roomserver_published WHERE published = $1 ORDER BY room_id ASC"
const selectPublishedSQL = "" +
"SELECT published FROM roomserver_published WHERE room_id = $1"
type publishedStatements struct {
upsertPublishedStmt *sql.Stmt
selectAllPublishedStmt *sql.Stmt
selectPublishedStmt *sql.Stmt
}
func createPublishedTable(db *sql.DB) error {
_, err := db.Exec(publishedSchema)
return err
}
func preparePublishedTable(db *sql.DB) (tables.Published, error) {
s := &publishedStatements{}
return s, sqlutil.StatementList{
{&s.upsertPublishedStmt, upsertPublishedSQL},
{&s.selectAllPublishedStmt, selectAllPublishedSQL},
{&s.selectPublishedStmt, selectPublishedSQL},
}.Prepare(db)
}
func (s *publishedStatements) UpsertRoomPublished(
ctx context.Context, txn *sql.Tx, roomID string, published bool,
) (err error) {
stmt := sqlutil.TxStmt(txn, s.upsertPublishedStmt)
_, err = stmt.ExecContext(ctx, roomID, published)
return
}
func (s *publishedStatements) SelectPublishedFromRoomID(
ctx context.Context, txn *sql.Tx, roomID string,
) (published bool, err error) {
stmt := sqlutil.TxStmt(txn, s.selectPublishedStmt)
err = stmt.QueryRowContext(ctx, roomID).Scan(&published)
if err == sql.ErrNoRows {
return false, nil
}
return
}
func (s *publishedStatements) SelectAllPublishedRooms(
ctx context.Context, txn *sql.Tx, published bool,
) ([]string, error) {
stmt := sqlutil.TxStmt(txn, s.selectAllPublishedStmt)
rows, err := stmt.QueryContext(ctx, published)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectAllPublishedStmt: 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, rows.Err()
}