mirrors/dendrite
1
0
Fork 0
mirror of https://github.com/element-hq/dendrite.git synced 2025-09-13 21:02:25 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Transactional isolation for /sync (#2745)

Browse source 
This should transactional snapshot isolation for `/sync` etc requests.

For now we don't use repeatable read due to some odd test failures with
invites.
This commit is contained in:
Neil Alexander 2022-09-30 12:48:10 +01:00 • committed by GitHub
parent 8a82f10046
commit 6348486a13
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
37 changed files with 1759 additions and 1527 deletions
Download patch file Download diff file Expand all files Collapse all files

30
syncapi/routing/context.go
View file

@ -51,6 +51,12 @@ func Context(
roomID, eventID string,
lazyLoadCache caching.LazyLoadCache,
) util.JSONResponse {
snapshot, err := syncDB.NewDatabaseSnapshot(req.Context())
if err != nil {
return jsonerror.InternalServerError()
}
defer snapshot.Rollback() // nolint:errcheck
filter, err := parseRoomEventFilter(req)
if err != nil {
errMsg := ""
@ -97,7 +103,7 @@ func Context(
ContainsURL: filter.ContainsURL,
}
id, requestedEvent, err := syncDB.SelectContextEvent(ctx, roomID, eventID)
id, requestedEvent, err := snapshot.SelectContextEvent(ctx, roomID, eventID)
if err != nil {
if err == sql.ErrNoRows {
return util.JSONResponse{
@ -111,7 +117,7 @@ func Context(
// verify the user is allowed to see the context for this room/event
startTime := time.Now()
filteredEvents, err := internal.ApplyHistoryVisibilityFilter(ctx, syncDB, rsAPI, []*gomatrixserverlib.HeaderedEvent{&requestedEvent}, nil, device.UserID, "context")
filteredEvents, err := internal.ApplyHistoryVisibilityFilter(ctx, snapshot, rsAPI, []*gomatrixserverlib.HeaderedEvent{&requestedEvent}, nil, device.UserID, "context")
if err != nil {
logrus.WithError(err).Error("unable to apply history visibility filter")
return jsonerror.InternalServerError()
@ -127,20 +133,20 @@ func Context(
}
}
eventsBefore, err := syncDB.SelectContextBeforeEvent(ctx, id, roomID, filter)
eventsBefore, err := snapshot.SelectContextBeforeEvent(ctx, id, roomID, filter)
if err != nil && err != sql.ErrNoRows {
logrus.WithError(err).Error("unable to fetch before events")
return jsonerror.InternalServerError()
}
_, eventsAfter, err := syncDB.SelectContextAfterEvent(ctx, id, roomID, filter)
_, eventsAfter, err := snapshot.SelectContextAfterEvent(ctx, id, roomID, filter)
if err != nil && err != sql.ErrNoRows {
logrus.WithError(err).Error("unable to fetch after events")
return jsonerror.InternalServerError()
}
startTime = time.Now()
eventsBeforeFiltered, eventsAfterFiltered, err := applyHistoryVisibilityOnContextEvents(ctx, syncDB, rsAPI, eventsBefore, eventsAfter, device.UserID)
eventsBeforeFiltered, eventsAfterFiltered, err := applyHistoryVisibilityOnContextEvents(ctx, snapshot, rsAPI, eventsBefore, eventsAfter, device.UserID)
if err != nil {
logrus.WithError(err).Error("unable to apply history visibility filter")
return jsonerror.InternalServerError()
@ -152,7 +158,7 @@ func Context(
}).Debug("applied history visibility (context eventsBefore/eventsAfter)")
// TODO: Get the actual state at the last event returned by SelectContextAfterEvent
state, err := syncDB.CurrentState(ctx, roomID, &stateFilter, nil)
state, err := snapshot.CurrentState(ctx, roomID, &stateFilter, nil)
if err != nil {
logrus.WithError(err).Error("unable to fetch current room state")
return jsonerror.InternalServerError()
@ -173,7 +179,7 @@ func Context(
if len(response.State) > filter.Limit {
response.State = response.State[len(response.State)-filter.Limit:]
}
start, end, err := getStartEnd(ctx, syncDB, eventsBefore, eventsAfter)
start, end, err := getStartEnd(ctx, snapshot, eventsBefore, eventsAfter)
if err == nil {
response.End = end.String()
response.Start = start.String()
@ -188,7 +194,7 @@ func Context(
// by combining the events before and after the context event. Returns the filtered events,
// and an error, if any.
func applyHistoryVisibilityOnContextEvents(
ctx context.Context, syncDB storage.Database, rsAPI roomserver.SyncRoomserverAPI,
ctx context.Context, snapshot storage.DatabaseTransaction, rsAPI roomserver.SyncRoomserverAPI,
eventsBefore, eventsAfter []*gomatrixserverlib.HeaderedEvent,
userID string,
) (filteredBefore, filteredAfter []*gomatrixserverlib.HeaderedEvent, err error) {
@ -205,7 +211,7 @@ func applyHistoryVisibilityOnContextEvents(
}
allEvents := append(eventsBefore, eventsAfter...)
filteredEvents, err := internal.ApplyHistoryVisibilityFilter(ctx, syncDB, rsAPI, allEvents, nil, userID, "context")
filteredEvents, err := internal.ApplyHistoryVisibilityFilter(ctx, snapshot, rsAPI, allEvents, nil, userID, "context")
if err != nil {
return nil, nil, err
}
@ -222,15 +228,15 @@ func applyHistoryVisibilityOnContextEvents(
return filteredBefore, filteredAfter, nil
}
func getStartEnd(ctx context.Context, syncDB storage.Database, startEvents, endEvents []*gomatrixserverlib.HeaderedEvent) (start, end types.TopologyToken, err error) {
func getStartEnd(ctx context.Context, snapshot storage.DatabaseTransaction, startEvents, endEvents []*gomatrixserverlib.HeaderedEvent) (start, end types.TopologyToken, err error) {
if len(startEvents) > 0 {
start, err = syncDB.EventPositionInTopology(ctx, startEvents[0].EventID())
start, err = snapshot.EventPositionInTopology(ctx, startEvents[0].EventID())
if err != nil {
return
}
}
if len(endEvents) > 0 {
end, err = syncDB.EventPositionInTopology(ctx, endEvents[0].EventID())
end, err = snapshot.EventPositionInTopology(ctx, endEvents[0].EventID())
}
return
}