Allow batching in JetStreamConsumer (#2686)

This allows us to receive more than one message from NATS at a time if we want.
This commit is contained in:
Neil Alexander 2022-08-31 12:21:56 +01:00 committed by GitHub
parent ba0b3adab4
commit 175f65407a
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19 changed files with 88 additions and 55 deletions

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@ -68,8 +68,8 @@ func NewOutputRoomEventConsumer(
// Start consuming from room servers
func (s *OutputRoomEventConsumer) Start() error {
return jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, s.onMessage,
nats.DeliverAll(), nats.ManualAck(),
s.ctx, s.jetstream, s.topic, s.durable, 1,
s.onMessage, nats.DeliverAll(), nats.ManualAck(),
)
}
@ -77,7 +77,8 @@ func (s *OutputRoomEventConsumer) Start() error {
// It is unsafe to call this with messages for the same room in multiple gorountines
// because updates it will likely fail with a types.EventIDMismatchError when it
// realises that it cannot update the room state using the deltas.
func (s *OutputRoomEventConsumer) onMessage(ctx context.Context, msg *nats.Msg) bool {
func (s *OutputRoomEventConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
msg := msgs[0] // Guaranteed to exist if onMessage is called
// Parse out the event JSON
var output api.OutputEvent
if err := json.Unmarshal(msg.Data, &output); err != nil {