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Remove KindRewrite (#1481)

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* Don't send rewrite events

* Remove final traces of rewrite events

* Remove test that is no longer needed

* Revert "Remove test that is no longer needed"

This reverts commit 9a45babff6.

* Update test to use KindOutlier
This commit is contained in:
Neil Alexander 2020-10-06 11:05:00 +01:00 committed by GitHub
parent 8fb74fe99a
commit bf90db5b60
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 3 additions and 109 deletions
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2
federationsender/internal/perform.go
View file

@ -232,7 +232,7 @@ func (r *FederationSenderInternalAPI) performJoinUsingServer(
// If we successfully performed a send_join above then the other
// server now thinks we're a part of the room. Send the newly
// returned state to the roomserver to update our local view.
if err = roomserverAPI.SendEventWithRewrite(
if err = roomserverAPI.SendEventWithState(
ctx, r.rsAPI,
respState,
event.Headered(respMakeJoin.RoomVersion),

4
roomserver/api/input.go
View file

@ -35,10 +35,6 @@ const (
// KindBackfill event extend the contiguous graph going backwards.
// They always have state.
KindBackfill = 3
// KindRewrite events are used when rewriting the head of the room
// graph with entirely new state. The output events generated will
// be state events rather than timeline events.
KindRewrite = 4
)
// DoNotSendToOtherServers tells us not to send the event to other matrix

93
roomserver/api/wrapper.go
View file

@ -80,99 +80,6 @@ func SendEventWithState(
return SendInputRoomEvents(ctx, rsAPI, ires)
}
// SendEventWithRewrite writes an event with KindNew to the roomserver along
// with a number of rewrite and outlier events for state and auth events
// respectively.
func SendEventWithRewrite(
ctx context.Context, rsAPI RoomserverInternalAPI, state *gomatrixserverlib.RespState,
event gomatrixserverlib.HeaderedEvent, haveEventIDs map[string]bool,
) error {
isCurrentState := map[string]struct{}{}
for _, se := range state.StateEvents {
isCurrentState[se.EventID()] = struct{}{}
}
authAndStateEvents, err := state.Events()
if err != nil {
return err
}
var ires []InputRoomEvent
var stateIDs []string
// This function generates three things:
// A - A set of "rewrite" events, which will form the newly rewritten
// state before the event, which includes every rewrite event that
// came before it in its state
// B - A set of "outlier" events, which are auth events but not part
// of the rewritten state
// C - A "new" event, which include all of the rewrite events in its
// state
for _, authOrStateEvent := range authAndStateEvents {
if authOrStateEvent.StateKey() == nil {
continue
}
if haveEventIDs[authOrStateEvent.EventID()] {
continue
}
if event.StateKey() == nil {
continue
}
// We will handle an event as if it's an outlier if one of the
// following conditions is true:
storeAsOutlier := false
if _, ok := isCurrentState[authOrStateEvent.EventID()]; !ok {
// The event is an auth event and isn't a part of the state set.
// We'll send it as an outlier because we need it to be stored
// in case something is referring to it as an auth event.
storeAsOutlier = true
}
if storeAsOutlier {
ires = append(ires, InputRoomEvent{
Kind: KindOutlier,
Event: authOrStateEvent.Headered(event.RoomVersion),
AuthEventIDs: authOrStateEvent.AuthEventIDs(),
})
continue
}
// If the event isn't an outlier then we'll instead send it as a
// rewrite event, so that it'll form part of the rewritten state.
// These events will go through the membership and latest event
// updaters and we will generate output events, but they will be
// flagged as non-current (i.e. didn't just happen) events.
// Each of these rewrite events includes all of the rewrite events
// that came before in their StateEventIDs.
ires = append(ires, InputRoomEvent{
Kind: KindRewrite,
Event: authOrStateEvent.Headered(event.RoomVersion),
AuthEventIDs: authOrStateEvent.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
// Add the event ID into the StateEventIDs of all subsequent
// rewrite events, and the new event.
stateIDs = append(stateIDs, authOrStateEvent.EventID())
}
// Send the final event as a new event, which will generate
// a timeline output event for it. All of the rewrite events
// that came before will be sent as StateEventIDs, forming a
// new clean state before the event.
ires = append(ires, InputRoomEvent{
Kind: KindNew,
Event: event,
AuthEventIDs: event.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
return SendInputRoomEvents(ctx, rsAPI, ires)
}
// SendInputRoomEvents to the roomserver.
func SendInputRoomEvents(
ctx context.Context, rsAPI RoomserverInternalAPI, ires []InputRoomEvent,

9
roomserver/internal/input/input_events.go
View file

@ -136,15 +136,6 @@ func (r *Inputer) processRoomEvent(
return event.EventID(), rejectionErr
}
if input.Kind == api.KindRewrite {
logrus.WithFields(logrus.Fields{
"event_id": event.EventID(),
"type": event.Type(),
"room": event.RoomID(),
}).Debug("Stored rewrite")
return event.EventID(), nil
}
if err = r.updateLatestEvents(
ctx, // context
roomInfo, // room info for the room being updated

4
roomserver/roomserver_test.go
View file

@ -238,7 +238,7 @@ func TestOutputRedactedEvent(t *testing.T) {
}
}
// This tests that rewriting state via KindRewrite works correctly.
// This tests that rewriting state works correctly.
// This creates a small room with a create/join/name state, then replays it
// with a new room name. We expect the output events to contain the original events,
// followed by a single OutputNewRoomEvent with RewritesState set to true with the
@ -344,7 +344,7 @@ func TestOutputRewritesState(t *testing.T) {
for i := 0; i < len(rewriteEvents)-1; i++ {
ev := rewriteEvents[i]
inputEvents = append(inputEvents, api.InputRoomEvent{
Kind: api.KindRewrite,
Kind: api.KindOutlier,
Event: ev,
AuthEventIDs: ev.AuthEventIDs(),
HasState: true,