mirror of
https://github.com/matrix-org/dendrite
synced 2024-11-20 08:40:14 +01:00
d32f60249d
This now uses a transaction per stream, so that errors in one stream don't propagate to another, and we therefore no longer need to do hacks to reopen a new transaction after aborting a failed one.
575 lines
21 KiB
Go
575 lines
21 KiB
Go
package shared
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/matrix-org/dendrite/internal/eventutil"
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"github.com/matrix-org/dendrite/syncapi/types"
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userapi "github.com/matrix-org/dendrite/userapi/api"
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"github.com/matrix-org/gomatrixserverlib"
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)
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type DatabaseTransaction struct {
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*Database
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ctx context.Context
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txn *sql.Tx
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}
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func (d *DatabaseTransaction) Commit() error {
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if d.txn == nil {
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return nil
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}
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return d.txn.Commit()
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}
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func (d *DatabaseTransaction) Rollback() error {
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if d.txn == nil {
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return nil
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}
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return d.txn.Rollback()
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}
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func (d *DatabaseTransaction) MaxStreamPositionForPDUs(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.OutputEvents.SelectMaxEventID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.OutputEvents.SelectMaxEventID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) MaxStreamPositionForReceipts(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.Receipts.SelectMaxReceiptID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.Receipts.SelectMaxReceiptID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) MaxStreamPositionForInvites(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.Invites.SelectMaxInviteID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.Invites.SelectMaxInviteID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) MaxStreamPositionForSendToDeviceMessages(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.SendToDevice.SelectMaxSendToDeviceMessageID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.SendToDevice.SelectMaxSendToDeviceMessageID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) MaxStreamPositionForAccountData(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.AccountData.SelectMaxAccountDataID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.Invites.SelectMaxAccountDataID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) MaxStreamPositionForNotificationData(ctx context.Context) (types.StreamPosition, error) {
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id, err := d.NotificationData.SelectMaxID(ctx, d.txn)
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if err != nil {
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return 0, fmt.Errorf("d.NotificationData.SelectMaxID: %w", err)
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}
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return types.StreamPosition(id), nil
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}
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func (d *DatabaseTransaction) CurrentState(ctx context.Context, roomID string, stateFilterPart *gomatrixserverlib.StateFilter, excludeEventIDs []string) ([]*gomatrixserverlib.HeaderedEvent, error) {
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return d.CurrentRoomState.SelectCurrentState(ctx, d.txn, roomID, stateFilterPart, excludeEventIDs)
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}
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func (d *DatabaseTransaction) RoomIDsWithMembership(ctx context.Context, userID string, membership string) ([]string, error) {
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return d.CurrentRoomState.SelectRoomIDsWithMembership(ctx, d.txn, userID, membership)
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}
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func (d *DatabaseTransaction) MembershipCount(ctx context.Context, roomID, membership string, pos types.StreamPosition) (int, error) {
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return d.Memberships.SelectMembershipCount(ctx, d.txn, roomID, membership, pos)
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}
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func (d *DatabaseTransaction) GetRoomHeroes(ctx context.Context, roomID, userID string, memberships []string) ([]string, error) {
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return d.Memberships.SelectHeroes(ctx, d.txn, roomID, userID, memberships)
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}
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func (d *DatabaseTransaction) RecentEvents(ctx context.Context, roomID string, r types.Range, eventFilter *gomatrixserverlib.RoomEventFilter, chronologicalOrder bool, onlySyncEvents bool) ([]types.StreamEvent, bool, error) {
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return d.OutputEvents.SelectRecentEvents(ctx, d.txn, roomID, r, eventFilter, chronologicalOrder, onlySyncEvents)
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}
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func (d *DatabaseTransaction) PositionInTopology(ctx context.Context, eventID string) (pos types.StreamPosition, spos types.StreamPosition, err error) {
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return d.Topology.SelectPositionInTopology(ctx, d.txn, eventID)
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}
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func (d *DatabaseTransaction) InviteEventsInRange(ctx context.Context, targetUserID string, r types.Range) (map[string]*gomatrixserverlib.HeaderedEvent, map[string]*gomatrixserverlib.HeaderedEvent, types.StreamPosition, error) {
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return d.Invites.SelectInviteEventsInRange(ctx, d.txn, targetUserID, r)
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}
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func (d *DatabaseTransaction) PeeksInRange(ctx context.Context, userID, deviceID string, r types.Range) (peeks []types.Peek, err error) {
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return d.Peeks.SelectPeeksInRange(ctx, d.txn, userID, deviceID, r)
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}
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func (d *DatabaseTransaction) RoomReceiptsAfter(ctx context.Context, roomIDs []string, streamPos types.StreamPosition) (types.StreamPosition, []types.OutputReceiptEvent, error) {
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return d.Receipts.SelectRoomReceiptsAfter(ctx, d.txn, roomIDs, streamPos)
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}
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// Events lookups a list of event by their event ID.
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// Returns a list of events matching the requested IDs found in the database.
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// If an event is not found in the database then it will be omitted from the list.
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// Returns an error if there was a problem talking with the database.
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// Does not include any transaction IDs in the returned events.
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func (d *DatabaseTransaction) Events(ctx context.Context, eventIDs []string) ([]*gomatrixserverlib.HeaderedEvent, error) {
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streamEvents, err := d.OutputEvents.SelectEvents(ctx, d.txn, eventIDs, nil, false)
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if err != nil {
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return nil, err
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}
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// We don't include a device here as we only include transaction IDs in
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// incremental syncs.
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return d.StreamEventsToEvents(nil, streamEvents), nil
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}
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func (d *DatabaseTransaction) AllJoinedUsersInRooms(ctx context.Context) (map[string][]string, error) {
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return d.CurrentRoomState.SelectJoinedUsers(ctx, d.txn)
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}
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func (d *DatabaseTransaction) AllJoinedUsersInRoom(ctx context.Context, roomIDs []string) (map[string][]string, error) {
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return d.CurrentRoomState.SelectJoinedUsersInRoom(ctx, d.txn, roomIDs)
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}
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func (d *DatabaseTransaction) AllPeekingDevicesInRooms(ctx context.Context) (map[string][]types.PeekingDevice, error) {
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return d.Peeks.SelectPeekingDevices(ctx, d.txn)
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}
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func (d *DatabaseTransaction) SharedUsers(ctx context.Context, userID string, otherUserIDs []string) ([]string, error) {
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return d.CurrentRoomState.SelectSharedUsers(ctx, d.txn, userID, otherUserIDs)
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}
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func (d *DatabaseTransaction) GetStateEvent(
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ctx context.Context, roomID, evType, stateKey string,
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) (*gomatrixserverlib.HeaderedEvent, error) {
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return d.CurrentRoomState.SelectStateEvent(ctx, d.txn, roomID, evType, stateKey)
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}
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func (d *DatabaseTransaction) GetStateEventsForRoom(
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ctx context.Context, roomID string, stateFilter *gomatrixserverlib.StateFilter,
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) (stateEvents []*gomatrixserverlib.HeaderedEvent, err error) {
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stateEvents, err = d.CurrentRoomState.SelectCurrentState(ctx, d.txn, roomID, stateFilter, nil)
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return
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}
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// GetAccountDataInRange returns all account data for a given user inserted or
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// updated between two given positions
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// Returns a map following the format data[roomID] = []dataTypes
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// If no data is retrieved, returns an empty map
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// If there was an issue with the retrieval, returns an error
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func (d *DatabaseTransaction) GetAccountDataInRange(
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ctx context.Context, userID string, r types.Range,
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accountDataFilterPart *gomatrixserverlib.EventFilter,
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) (map[string][]string, types.StreamPosition, error) {
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return d.AccountData.SelectAccountDataInRange(ctx, d.txn, userID, r, accountDataFilterPart)
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}
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func (d *DatabaseTransaction) GetEventsInTopologicalRange(
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ctx context.Context,
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from, to *types.TopologyToken,
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roomID string,
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filter *gomatrixserverlib.RoomEventFilter,
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backwardOrdering bool,
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) (events []types.StreamEvent, err error) {
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var minDepth, maxDepth, maxStreamPosForMaxDepth types.StreamPosition
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if backwardOrdering {
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// Backward ordering means the 'from' token has a higher depth than the 'to' token
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minDepth = to.Depth
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maxDepth = from.Depth
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// for cases where we have say 5 events with the same depth, the TopologyToken needs to
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// know which of the 5 the client has seen. This is done by using the PDU position.
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// Events with the same maxDepth but less than this PDU position will be returned.
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maxStreamPosForMaxDepth = from.PDUPosition
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} else {
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// Forward ordering means the 'from' token has a lower depth than the 'to' token.
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minDepth = from.Depth
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maxDepth = to.Depth
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}
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// Select the event IDs from the defined range.
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var eIDs []string
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eIDs, err = d.Topology.SelectEventIDsInRange(
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ctx, d.txn, roomID, minDepth, maxDepth, maxStreamPosForMaxDepth, filter.Limit, !backwardOrdering,
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)
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if err != nil {
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return
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}
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// Retrieve the events' contents using their IDs.
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events, err = d.OutputEvents.SelectEvents(ctx, d.txn, eIDs, filter, true)
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return
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}
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func (d *DatabaseTransaction) BackwardExtremitiesForRoom(
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ctx context.Context, roomID string,
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) (backwardExtremities map[string][]string, err error) {
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return d.BackwardExtremities.SelectBackwardExtremitiesForRoom(ctx, d.txn, roomID)
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}
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func (d *DatabaseTransaction) MaxTopologicalPosition(
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ctx context.Context, roomID string,
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) (types.TopologyToken, error) {
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depth, streamPos, err := d.Topology.SelectMaxPositionInTopology(ctx, d.txn, roomID)
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if err != nil {
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return types.TopologyToken{}, err
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}
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return types.TopologyToken{Depth: depth, PDUPosition: streamPos}, nil
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}
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func (d *DatabaseTransaction) EventPositionInTopology(
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ctx context.Context, eventID string,
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) (types.TopologyToken, error) {
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depth, stream, err := d.Topology.SelectPositionInTopology(ctx, d.txn, eventID)
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if err != nil {
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return types.TopologyToken{}, err
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}
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return types.TopologyToken{Depth: depth, PDUPosition: stream}, nil
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}
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func (d *DatabaseTransaction) StreamToTopologicalPosition(
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ctx context.Context, roomID string, streamPos types.StreamPosition, backwardOrdering bool,
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) (types.TopologyToken, error) {
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topoPos, err := d.Topology.SelectStreamToTopologicalPosition(ctx, d.txn, roomID, streamPos, backwardOrdering)
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switch {
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case err == sql.ErrNoRows && backwardOrdering: // no events in range, going backward
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return types.TopologyToken{PDUPosition: streamPos}, nil
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case err == sql.ErrNoRows && !backwardOrdering: // no events in range, going forward
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topoPos, streamPos, err = d.Topology.SelectMaxPositionInTopology(ctx, d.txn, roomID)
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if err != nil {
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return types.TopologyToken{}, fmt.Errorf("d.Topology.SelectMaxPositionInTopology: %w", err)
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}
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return types.TopologyToken{Depth: topoPos, PDUPosition: streamPos}, nil
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case err != nil: // some other error happened
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return types.TopologyToken{}, fmt.Errorf("d.Topology.SelectStreamToTopologicalPosition: %w", err)
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default:
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return types.TopologyToken{Depth: topoPos, PDUPosition: streamPos}, nil
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}
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}
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// GetBackwardTopologyPos retrieves the backward topology position, i.e. the position of the
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// oldest event in the room's topology.
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func (d *DatabaseTransaction) GetBackwardTopologyPos(
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ctx context.Context,
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events []types.StreamEvent,
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) (types.TopologyToken, error) {
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zeroToken := types.TopologyToken{}
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if len(events) == 0 {
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return zeroToken, nil
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}
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pos, spos, err := d.Topology.SelectPositionInTopology(ctx, d.txn, events[0].EventID())
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if err != nil {
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return zeroToken, err
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}
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tok := types.TopologyToken{Depth: pos, PDUPosition: spos}
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tok.Decrement()
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return tok, nil
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}
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// GetStateDeltas returns the state deltas between fromPos and toPos,
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// exclusive of oldPos, inclusive of newPos, for the rooms in which
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// the user has new membership events.
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// A list of joined room IDs is also returned in case the caller needs it.
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func (d *DatabaseTransaction) GetStateDeltas(
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ctx context.Context, device *userapi.Device,
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r types.Range, userID string,
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stateFilter *gomatrixserverlib.StateFilter,
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) (deltas []types.StateDelta, joinedRoomsIDs []string, err error) {
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// Implement membership change algorithm: https://github.com/matrix-org/synapse/blob/v0.19.3/synapse/handlers/sync.py#L821
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// - Get membership list changes for this user in this sync response
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// - For each room which has membership list changes:
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// * Check if the room is 'newly joined' (insufficient to just check for a join event because we allow dupe joins TODO).
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// If it is, then we need to send the full room state down (and 'limited' is always true).
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// * Check if user is still CURRENTLY invited to the room. If so, add room to 'invited' block.
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// * Check if the user is CURRENTLY (TODO) left/banned. If so, add room to 'archived' block.
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// - Get all CURRENTLY joined rooms, and add them to 'joined' block.
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// Look up all memberships for the user. We only care about rooms that a
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// user has ever interacted with — joined to, kicked/banned from, left.
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memberships, err := d.CurrentRoomState.SelectRoomIDsWithAnyMembership(ctx, d.txn, userID)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, nil, nil
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}
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return nil, nil, err
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}
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allRoomIDs := make([]string, 0, len(memberships))
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joinedRoomIDs := make([]string, 0, len(memberships))
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for roomID, membership := range memberships {
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allRoomIDs = append(allRoomIDs, roomID)
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if membership == gomatrixserverlib.Join {
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joinedRoomIDs = append(joinedRoomIDs, roomID)
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}
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}
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// get all the state events ever (i.e. for all available rooms) between these two positions
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stateNeeded, eventMap, err := d.OutputEvents.SelectStateInRange(ctx, d.txn, r, stateFilter, allRoomIDs)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, nil, nil
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}
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return nil, nil, err
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}
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state, err := d.fetchStateEvents(ctx, d.txn, stateNeeded, eventMap)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, nil, nil
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}
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return nil, nil, err
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}
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// find out which rooms this user is peeking, if any.
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// We do this before joins so any peeks get overwritten
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peeks, err := d.Peeks.SelectPeeksInRange(ctx, d.txn, userID, device.ID, r)
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if err != nil && err != sql.ErrNoRows {
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return nil, nil, err
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}
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// add peek blocks
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for _, peek := range peeks {
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if peek.New {
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// send full room state down instead of a delta
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var s []types.StreamEvent
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s, err = d.currentStateStreamEventsForRoom(ctx, peek.RoomID, stateFilter)
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if err != nil {
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if err == sql.ErrNoRows {
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continue
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}
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return nil, nil, err
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}
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state[peek.RoomID] = s
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}
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if !peek.Deleted {
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deltas = append(deltas, types.StateDelta{
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Membership: gomatrixserverlib.Peek,
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StateEvents: d.StreamEventsToEvents(device, state[peek.RoomID]),
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RoomID: peek.RoomID,
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})
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}
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}
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// handle newly joined rooms and non-joined rooms
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newlyJoinedRooms := make(map[string]bool, len(state))
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for roomID, stateStreamEvents := range state {
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for _, ev := range stateStreamEvents {
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if membership, prevMembership := getMembershipFromEvent(ev.Event, userID); membership != "" {
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if membership == gomatrixserverlib.Join && prevMembership != membership {
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// send full room state down instead of a delta
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var s []types.StreamEvent
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s, err = d.currentStateStreamEventsForRoom(ctx, roomID, stateFilter)
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if err != nil {
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if err == sql.ErrNoRows {
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continue
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}
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return nil, nil, err
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}
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state[roomID] = s
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newlyJoinedRooms[roomID] = true
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continue // we'll add this room in when we do joined rooms
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}
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deltas = append(deltas, types.StateDelta{
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Membership: membership,
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MembershipPos: ev.StreamPosition,
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StateEvents: d.StreamEventsToEvents(device, stateStreamEvents),
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RoomID: roomID,
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})
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break
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}
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}
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}
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// Add in currently joined rooms
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for _, joinedRoomID := range joinedRoomIDs {
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deltas = append(deltas, types.StateDelta{
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Membership: gomatrixserverlib.Join,
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StateEvents: d.StreamEventsToEvents(device, state[joinedRoomID]),
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RoomID: joinedRoomID,
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NewlyJoined: newlyJoinedRooms[joinedRoomID],
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})
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}
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return deltas, joinedRoomIDs, nil
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}
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// GetStateDeltasForFullStateSync is a variant of getStateDeltas used for /sync
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// requests with full_state=true.
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// Fetches full state for all joined rooms and uses selectStateInRange to get
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// updates for other rooms.
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func (d *DatabaseTransaction) GetStateDeltasForFullStateSync(
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ctx context.Context, device *userapi.Device,
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r types.Range, userID string,
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stateFilter *gomatrixserverlib.StateFilter,
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) ([]types.StateDelta, []string, error) {
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// Look up all memberships for the user. We only care about rooms that a
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// user has ever interacted with — joined to, kicked/banned from, left.
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memberships, err := d.CurrentRoomState.SelectRoomIDsWithAnyMembership(ctx, d.txn, userID)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, nil, nil
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}
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return nil, nil, err
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}
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allRoomIDs := make([]string, 0, len(memberships))
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joinedRoomIDs := make([]string, 0, len(memberships))
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for roomID, membership := range memberships {
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allRoomIDs = append(allRoomIDs, roomID)
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if membership == gomatrixserverlib.Join {
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joinedRoomIDs = append(joinedRoomIDs, roomID)
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}
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}
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// Use a reasonable initial capacity
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deltas := make(map[string]types.StateDelta)
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peeks, err := d.Peeks.SelectPeeksInRange(ctx, d.txn, userID, device.ID, r)
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if err != nil && err != sql.ErrNoRows {
|
|
return nil, nil, err
|
|
}
|
|
|
|
// Add full states for all peeking rooms
|
|
for _, peek := range peeks {
|
|
if !peek.Deleted {
|
|
s, stateErr := d.currentStateStreamEventsForRoom(ctx, peek.RoomID, stateFilter)
|
|
if stateErr != nil {
|
|
if stateErr == sql.ErrNoRows {
|
|
continue
|
|
}
|
|
return nil, nil, stateErr
|
|
}
|
|
deltas[peek.RoomID] = types.StateDelta{
|
|
Membership: gomatrixserverlib.Peek,
|
|
StateEvents: d.StreamEventsToEvents(device, s),
|
|
RoomID: peek.RoomID,
|
|
}
|
|
}
|
|
}
|
|
|
|
// Get all the state events ever between these two positions
|
|
stateNeeded, eventMap, err := d.OutputEvents.SelectStateInRange(ctx, d.txn, r, stateFilter, allRoomIDs)
|
|
if err != nil {
|
|
if err == sql.ErrNoRows {
|
|
return nil, nil, nil
|
|
}
|
|
return nil, nil, err
|
|
}
|
|
state, err := d.fetchStateEvents(ctx, d.txn, stateNeeded, eventMap)
|
|
if err != nil {
|
|
if err == sql.ErrNoRows {
|
|
return nil, nil, nil
|
|
}
|
|
return nil, nil, err
|
|
}
|
|
|
|
for roomID, stateStreamEvents := range state {
|
|
for _, ev := range stateStreamEvents {
|
|
if membership, _ := getMembershipFromEvent(ev.Event, userID); membership != "" {
|
|
if membership != gomatrixserverlib.Join { // We've already added full state for all joined rooms above.
|
|
deltas[roomID] = types.StateDelta{
|
|
Membership: membership,
|
|
MembershipPos: ev.StreamPosition,
|
|
StateEvents: d.StreamEventsToEvents(device, stateStreamEvents),
|
|
RoomID: roomID,
|
|
}
|
|
}
|
|
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add full states for all joined rooms
|
|
for _, joinedRoomID := range joinedRoomIDs {
|
|
s, stateErr := d.currentStateStreamEventsForRoom(ctx, joinedRoomID, stateFilter)
|
|
if stateErr != nil {
|
|
if stateErr == sql.ErrNoRows {
|
|
continue
|
|
}
|
|
return nil, nil, stateErr
|
|
}
|
|
deltas[joinedRoomID] = types.StateDelta{
|
|
Membership: gomatrixserverlib.Join,
|
|
StateEvents: d.StreamEventsToEvents(device, s),
|
|
RoomID: joinedRoomID,
|
|
}
|
|
}
|
|
|
|
// Create a response array.
|
|
result := make([]types.StateDelta, len(deltas))
|
|
i := 0
|
|
for _, delta := range deltas {
|
|
result[i] = delta
|
|
i++
|
|
}
|
|
|
|
return result, joinedRoomIDs, nil
|
|
}
|
|
|
|
func (d *DatabaseTransaction) currentStateStreamEventsForRoom(
|
|
ctx context.Context, roomID string,
|
|
stateFilter *gomatrixserverlib.StateFilter,
|
|
) ([]types.StreamEvent, error) {
|
|
allState, err := d.CurrentRoomState.SelectCurrentState(ctx, d.txn, roomID, stateFilter, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
s := make([]types.StreamEvent, len(allState))
|
|
for i := 0; i < len(s); i++ {
|
|
s[i] = types.StreamEvent{HeaderedEvent: allState[i], StreamPosition: 0}
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
func (d *DatabaseTransaction) SendToDeviceUpdatesForSync(
|
|
ctx context.Context,
|
|
userID, deviceID string,
|
|
from, to types.StreamPosition,
|
|
) (types.StreamPosition, []types.SendToDeviceEvent, error) {
|
|
// First of all, get our send-to-device updates for this user.
|
|
lastPos, events, err := d.SendToDevice.SelectSendToDeviceMessages(ctx, d.txn, userID, deviceID, from, to)
|
|
if err != nil {
|
|
return from, nil, fmt.Errorf("d.SendToDevice.SelectSendToDeviceMessages: %w", err)
|
|
}
|
|
// If there's nothing to do then stop here.
|
|
if len(events) == 0 {
|
|
return to, nil, nil
|
|
}
|
|
return lastPos, events, nil
|
|
}
|
|
|
|
func (d *DatabaseTransaction) GetRoomReceipts(ctx context.Context, roomIDs []string, streamPos types.StreamPosition) ([]types.OutputReceiptEvent, error) {
|
|
_, receipts, err := d.Receipts.SelectRoomReceiptsAfter(ctx, d.txn, roomIDs, streamPos)
|
|
return receipts, err
|
|
}
|
|
|
|
func (d *DatabaseTransaction) GetUserUnreadNotificationCountsForRooms(ctx context.Context, userID string, rooms map[string]string) (map[string]*eventutil.NotificationData, error) {
|
|
roomIDs := make([]string, 0, len(rooms))
|
|
for roomID, membership := range rooms {
|
|
if membership != gomatrixserverlib.Join {
|
|
continue
|
|
}
|
|
roomIDs = append(roomIDs, roomID)
|
|
}
|
|
return d.NotificationData.SelectUserUnreadCountsForRooms(ctx, d.txn, userID, roomIDs)
|
|
}
|
|
|
|
func (d *DatabaseTransaction) GetPresence(ctx context.Context, userID string) (*types.PresenceInternal, error) {
|
|
return d.Presence.GetPresenceForUser(ctx, d.txn, userID)
|
|
}
|
|
|
|
func (d *DatabaseTransaction) PresenceAfter(ctx context.Context, after types.StreamPosition, filter gomatrixserverlib.EventFilter) (map[string]*types.PresenceInternal, error) {
|
|
return d.Presence.GetPresenceAfter(ctx, d.txn, after, filter)
|
|
}
|
|
|
|
func (d *DatabaseTransaction) MaxStreamPositionForPresence(ctx context.Context) (types.StreamPosition, error) {
|
|
return d.Presence.GetMaxPresenceID(ctx, d.txn)
|
|
}
|