236 lines
7.0 KiB
Go
236 lines
7.0 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 sqlite3
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import (
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"context"
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"database/sql"
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"github.com/matrix-org/dendrite/internal/caching"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/storage/shared"
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"github.com/matrix-org/dendrite/roomserver/storage/sqlite3/deltas"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/gomatrixserverlib"
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)
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// A Database is used to store room events and stream offsets.
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type Database struct {
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shared.Database
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}
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// Open a sqlite database.
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func Open(dbProperties *config.DatabaseOptions, cache caching.RoomServerCaches) (*Database, error) {
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var d Database
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var db *sql.DB
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var err error
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if db, err = sqlutil.Open(dbProperties); err != nil {
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return nil, err
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}
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//db.Exec("PRAGMA journal_mode=WAL;")
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//db.Exec("PRAGMA read_uncommitted = true;")
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// FIXME: We are leaking connections somewhere. Setting this to 2 will eventually
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// cause the roomserver to be unresponsive to new events because something will
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// acquire the global mutex and never unlock it because it is waiting for a connection
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// which it will never obtain.
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db.SetMaxOpenConns(20)
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// Create the tables.
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if err := d.create(db); err != nil {
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return nil, err
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}
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// Then execute the migrations. By this point the tables are created with the latest
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// schemas.
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m := sqlutil.NewMigrations()
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deltas.LoadAddForgottenColumn(m)
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deltas.LoadStateBlocksRefactor(m)
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if err := m.RunDeltas(db, dbProperties); err != nil {
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return nil, err
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}
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// Then prepare the statements. Now that the migrations have run, any columns referred
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// to in the database code should now exist.
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if err := d.prepare(db, cache); err != nil {
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return nil, err
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}
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return &d, nil
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}
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func (d *Database) create(db *sql.DB) error {
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if err := createEventStateKeysTable(db); err != nil {
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return err
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}
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if err := createEventTypesTable(db); err != nil {
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return err
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}
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if err := createEventJSONTable(db); err != nil {
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return err
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}
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if err := createEventsTable(db); err != nil {
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return err
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}
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if err := createRoomsTable(db); err != nil {
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return err
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}
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if err := createTransactionsTable(db); err != nil {
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return err
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}
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if err := createStateBlockTable(db); err != nil {
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return err
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}
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if err := createStateSnapshotTable(db); err != nil {
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return err
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}
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if err := createPrevEventsTable(db); err != nil {
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return err
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}
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if err := createRoomAliasesTable(db); err != nil {
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return err
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}
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if err := createInvitesTable(db); err != nil {
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return err
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}
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if err := createMembershipTable(db); err != nil {
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return err
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}
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if err := createPublishedTable(db); err != nil {
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return err
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}
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if err := createRedactionsTable(db); err != nil {
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return err
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}
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return nil
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}
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func (d *Database) prepare(db *sql.DB, cache caching.RoomServerCaches) error {
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eventStateKeys, err := prepareEventStateKeysTable(db)
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if err != nil {
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return err
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}
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eventTypes, err := prepareEventTypesTable(db)
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if err != nil {
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return err
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}
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eventJSON, err := prepareEventJSONTable(db)
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if err != nil {
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return err
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}
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events, err := prepareEventsTable(db)
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if err != nil {
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return err
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}
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rooms, err := prepareRoomsTable(db)
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if err != nil {
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return err
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}
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transactions, err := prepareTransactionsTable(db)
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if err != nil {
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return err
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}
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stateBlock, err := prepareStateBlockTable(db)
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if err != nil {
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return err
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}
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stateSnapshot, err := prepareStateSnapshotTable(db)
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if err != nil {
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return err
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}
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prevEvents, err := preparePrevEventsTable(db)
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if err != nil {
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return err
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}
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roomAliases, err := prepareRoomAliasesTable(db)
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if err != nil {
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return err
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}
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invites, err := prepareInvitesTable(db)
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if err != nil {
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return err
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}
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membership, err := prepareMembershipTable(db)
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if err != nil {
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return err
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}
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published, err := preparePublishedTable(db)
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if err != nil {
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return err
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}
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redactions, err := prepareRedactionsTable(db)
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if err != nil {
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return err
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}
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d.Database = shared.Database{
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DB: db,
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Cache: cache,
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Writer: sqlutil.NewExclusiveWriter(),
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EventsTable: events,
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EventTypesTable: eventTypes,
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EventStateKeysTable: eventStateKeys,
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EventJSONTable: eventJSON,
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RoomsTable: rooms,
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TransactionsTable: transactions,
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StateBlockTable: stateBlock,
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StateSnapshotTable: stateSnapshot,
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PrevEventsTable: prevEvents,
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RoomAliasesTable: roomAliases,
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InvitesTable: invites,
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MembershipTable: membership,
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PublishedTable: published,
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RedactionsTable: redactions,
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GetLatestEventsForUpdateFn: d.GetLatestEventsForUpdate,
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}
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return nil
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}
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func (d *Database) SupportsConcurrentRoomInputs() bool {
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// This isn't supported in SQLite mode yet because of issues with
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// database locks.
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// TODO: Look at this again - the problem is probably to do with
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// the membership updaters and latest events updaters.
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return false
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}
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func (d *Database) GetLatestEventsForUpdate(
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ctx context.Context, roomInfo types.RoomInfo,
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) (*shared.LatestEventsUpdater, error) {
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// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
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// multiple write transactions on sqlite. The code will perform additional
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// write transactions independent of this one which will consistently cause
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// 'database is locked' errors. As sqlite doesn't support multi-process on the
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// same DB anyway, and we only execute updates sequentially, the only worries
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// are for rolling back when things go wrong. (atomicity)
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return shared.NewLatestEventsUpdater(ctx, &d.Database, nil, roomInfo)
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}
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func (d *Database) MembershipUpdater(
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ctx context.Context, roomID, targetUserID string,
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targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
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) (*shared.MembershipUpdater, error) {
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// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
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// multiple write transactions on sqlite. The code will perform additional
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// write transactions independent of this one which will consistently cause
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// 'database is locked' errors. As sqlite doesn't support multi-process on the
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// same DB anyway, and we only execute updates sequentially, the only worries
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// are for rolling back when things go wrong. (atomicity)
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return shared.NewMembershipUpdater(ctx, &d.Database, nil, roomID, targetUserID, targetLocal, roomVersion)
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}
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