private static Message ReadMessage(BrokerRouter router, string topic, int messageIndex, int maxBytes = 32768)
{
Message message = null;
long offset = router.LatestOffset(topic) - (2 - messageIndex);
List <Message> messages = router.Fetch(topic, 0, offset, maxBytes)?.Messages;
if ((messages?.Count ?? 0) > 0)
{
message = messages?[0];
}
if ((object)message == null)
{
throw new InvalidOperationException("No Kafka record to consume");
}
return(message);
}