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// 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"
_ "github.com/mattn/go-sqlite3"
"github.com/matrix-org/dendrite/internal/caching"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/storage/sqlite3/deltas"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
)
// A Database is used to store room events and stream offsets.
type Database struct {
shared.Database
}
// Open a sqlite database.
func Open(dbProperties *config.DatabaseOptions, cache caching.RoomServerCaches) (*Database, error) {
var d Database
var db *sql.DB
var err error
if db, err = sqlutil.Open(dbProperties); err != nil {
return nil, err
}
//db.Exec("PRAGMA journal_mode=WAL;")
//db.Exec("PRAGMA read_uncommitted = true;")
// FIXME: We are leaking connections somewhere. Setting this to 2 will eventually
// cause the roomserver to be unresponsive to new events because something will
// acquire the global mutex and never unlock it because it is waiting for a connection
// which it will never obtain.
db.SetMaxOpenConns(20)
// Create tables before executing migrations so we don't fail if the table is missing,
// and THEN prepare statements so we don't fail due to referencing new columns
ms := membershipStatements{}
if err := ms.execSchema(db); err != nil {
return nil, err
}
m := sqlutil.NewMigrations()
deltas.LoadAddForgottenColumn(m)
if err := m.RunDeltas(db, dbProperties); err != nil {
return nil, err
}
if err := d.prepare(db, cache); err != nil {
return nil, err
}
return &d, nil
}
// nolint: gocyclo
func (d *Database) prepare(db *sql.DB, cache caching.RoomServerCaches) error {
var err error
eventStateKeys, err := NewSqliteEventStateKeysTable(db)
if err != nil {
return err
}
eventTypes, err := NewSqliteEventTypesTable(db)
if err != nil {
return err
}
eventJSON, err := NewSqliteEventJSONTable(db)
if err != nil {
return err
}
events, err := NewSqliteEventsTable(db)
if err != nil {
return err
}
rooms, err := NewSqliteRoomsTable(db)
if err != nil {
return err
}
transactions, err := NewSqliteTransactionsTable(db)
if err != nil {
return err
}
stateBlock, err := NewSqliteStateBlockTable(db)
if err != nil {
return err
}
stateSnapshot, err := NewSqliteStateSnapshotTable(db)
if err != nil {
return err
}
prevEvents, err := NewSqlitePrevEventsTable(db)
if err != nil {
return err
}
roomAliases, err := NewSqliteRoomAliasesTable(db)
if err != nil {
return err
}
invites, err := NewSqliteInvitesTable(db)
if err != nil {
return err
}
membership, err := NewSqliteMembershipTable(db)
if err != nil {
return err
}
published, err := NewSqlitePublishedTable(db)
if err != nil {
return err
}
redactions, err := NewSqliteRedactionsTable(db)
if err != nil {
return err
}
d.Database = shared.Database{
DB: db,
Cache: cache,
Writer: sqlutil.NewExclusiveWriter(),
EventsTable: events,
EventTypesTable: eventTypes,
EventStateKeysTable: eventStateKeys,
EventJSONTable: eventJSON,
RoomsTable: rooms,
TransactionsTable: transactions,
StateBlockTable: stateBlock,
StateSnapshotTable: stateSnapshot,
PrevEventsTable: prevEvents,
RoomAliasesTable: roomAliases,
InvitesTable: invites,
MembershipTable: membership,
PublishedTable: published,
RedactionsTable: redactions,
GetLatestEventsForUpdateFn: d.GetLatestEventsForUpdate,
}
return nil
}
func (d *Database) SupportsConcurrentRoomInputs() bool {
// This isn't supported in SQLite mode yet because of issues with
// database locks.
// TODO: Look at this again - the problem is probably to do with
// the membership updaters and latest events updaters.
return false
}
func (d *Database) GetLatestEventsForUpdate(
ctx context.Context, roomInfo types.RoomInfo,
) (*shared.LatestEventsUpdater, error) {
// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
// multiple write transactions on sqlite. The code will perform additional
// write transactions independent of this one which will consistently cause
// 'database is locked' errors. As sqlite doesn't support multi-process on the
// same DB anyway, and we only execute updates sequentially, the only worries
// are for rolling back when things go wrong. (atomicity)
return shared.NewLatestEventsUpdater(ctx, &d.Database, nil, roomInfo)
}
func (d *Database) MembershipUpdater(
ctx context.Context, roomID, targetUserID string,
targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
) (*shared.MembershipUpdater, error) {
// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
// multiple write transactions on sqlite. The code will perform additional
// write transactions independent of this one which will consistently cause
// 'database is locked' errors. As sqlite doesn't support multi-process on the
// same DB anyway, and we only execute updates sequentially, the only worries
// are for rolling back when things go wrong. (atomicity)
return shared.NewMembershipUpdater(ctx, &d.Database, nil, roomID, targetUserID, targetLocal, roomVersion)
}
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