public Task <long> WriteEvent(BaseProposedEvent proposedEvent, CancellationToken cancellationToken)
{
var task = proposedEvent switch {
ProposedEvent p => Append(p),
ProposedMetaEvent => NoOp(),
ProposedDeleteStream => NoOp(),
IgnoredEvent => NoOp(),
_ => throw new InvalidOperationException("Unknown proposed event type")
};
return(Metrics.Measure(() => task, ReplicationMetrics.WritesHistogram, ReplicationMetrics.WriteErrorsCount));
async Task <long> Append(ProposedEvent p)
{
var route = _route(p);
_debug?.Invoke(
"Kafka: Write event with id {Id} of type {Type} to {Stream} with original position {Position}",
new object[] {
proposedEvent.EventDetails.EventId,
proposedEvent.EventDetails.EventType,
route.Topic,
proposedEvent.SourcePosition.EventPosition
}
);
// TODO: Map meta to headers, but only for JSON
var message = new Message <string, byte[]> {
Key = route.PartitionKey,
Value = p.Data
};
var result = await _producer.ProduceAsync(route.Topic, message, cancellationToken).ConfigureAwait(false);
return(result.Offset.Value);
}
public SinkContext(
BaseProposedEvent proposedEvent, CancellationToken cancellationToken
)
: base(cancellationToken)
{
ProposedEvent = proposedEvent;
}
