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Use pull consumers (#2140)

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* Pull consumers

* Pull consumers

* Only nuke consumers if they are push consumers

* Clean up old consumers

* Better error handling

* Update comments
This commit is contained in:
Neil Alexander 2022-02-02 13:32:48 +00:00 • committed by GitHub
parent 2dee706f9e
commit c773b038bb
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11 changed files with 521 additions and 459 deletions
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102
syncapi/consumers/roomserver.go
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@ -38,7 +38,7 @@ type OutputRoomEventConsumer struct {
cfg *config.SyncAPI
rsAPI api.RoomserverInternalAPI
jetstream nats.JetStreamContext
durable nats.SubOpt
durable string
topic string
db storage.Database
pduStream types.StreamProvider
@ -73,65 +73,61 @@ func NewOutputRoomEventConsumer(
// Start consuming from room servers
func (s *OutputRoomEventConsumer) Start() error {
_, err := s.jetstream.Subscribe(
s.topic, s.onMessage, s.durable,
nats.DeliverAll(),
nats.ManualAck(),
return jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, s.onMessage,
nats.DeliverAll(), nats.ManualAck(),
)
return err
}
// onMessage is called when the sync server receives a new event from the room server output log.
// It is not safe for this function to be called from multiple goroutines, or else the
// sync stream position may race and be incorrectly calculated.
func (s *OutputRoomEventConsumer) onMessage(msg *nats.Msg) {
jetstream.WithJetStreamMessage(msg, func(msg *nats.Msg) bool {
// Parse out the event JSON
var err error
var output api.OutputEvent
if err = json.Unmarshal(msg.Data, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("roomserver output log: message parse failure")
return true
}
switch output.Type {
case api.OutputTypeNewRoomEvent:
// Ignore redaction events. We will add them to the database when they are
// validated (when we receive OutputTypeRedactedEvent)
event := output.NewRoomEvent.Event
if event.Type() == gomatrixserverlib.MRoomRedaction && event.StateKey() == nil {
// in the special case where the event redacts itself, just pass the message through because
// we will never see the other part of the pair
if event.Redacts() != event.EventID() {
return true
}
}
err = s.onNewRoomEvent(s.ctx, *output.NewRoomEvent)
case api.OutputTypeOldRoomEvent:
err = s.onOldRoomEvent(s.ctx, *output.OldRoomEvent)
case api.OutputTypeNewInviteEvent:
s.onNewInviteEvent(s.ctx, *output.NewInviteEvent)
case api.OutputTypeRetireInviteEvent:
s.onRetireInviteEvent(s.ctx, *output.RetireInviteEvent)
case api.OutputTypeNewPeek:
s.onNewPeek(s.ctx, *output.NewPeek)
case api.OutputTypeRetirePeek:
s.onRetirePeek(s.ctx, *output.RetirePeek)
case api.OutputTypeRedactedEvent:
err = s.onRedactEvent(s.ctx, *output.RedactedEvent)
default:
log.WithField("type", output.Type).Debug(
"roomserver output log: ignoring unknown output type",
)
}
if err != nil {
log.WithError(err).Error("roomserver output log: failed to process event")
return false
}
func (s *OutputRoomEventConsumer) onMessage(ctx context.Context, msg *nats.Msg) bool {
// Parse out the event JSON
var err error
var output api.OutputEvent
if err = json.Unmarshal(msg.Data, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("roomserver output log: message parse failure")
return true
})
}
switch output.Type {
case api.OutputTypeNewRoomEvent:
// Ignore redaction events. We will add them to the database when they are
// validated (when we receive OutputTypeRedactedEvent)
event := output.NewRoomEvent.Event
if event.Type() == gomatrixserverlib.MRoomRedaction && event.StateKey() == nil {
// in the special case where the event redacts itself, just pass the message through because
// we will never see the other part of the pair
if event.Redacts() != event.EventID() {
return true
}
}
err = s.onNewRoomEvent(s.ctx, *output.NewRoomEvent)
case api.OutputTypeOldRoomEvent:
err = s.onOldRoomEvent(s.ctx, *output.OldRoomEvent)
case api.OutputTypeNewInviteEvent:
s.onNewInviteEvent(s.ctx, *output.NewInviteEvent)
case api.OutputTypeRetireInviteEvent:
s.onRetireInviteEvent(s.ctx, *output.RetireInviteEvent)
case api.OutputTypeNewPeek:
s.onNewPeek(s.ctx, *output.NewPeek)
case api.OutputTypeRetirePeek:
s.onRetirePeek(s.ctx, *output.RetirePeek)
case api.OutputTypeRedactedEvent:
err = s.onRedactEvent(s.ctx, *output.RedactedEvent)
default:
log.WithField("type", output.Type).Debug(
"roomserver output log: ignoring unknown output type",
)
}
if err != nil {
log.WithError(err).Error("roomserver output log: failed to process event")
return false
}
return true
}
func (s *OutputRoomEventConsumer) onRedactEvent(