internal MessageAndError?ConsumerPoll(IntPtr timeoutMs)
{
IntPtr msgPtr = LibRdKafka.consumer_poll(handle, timeoutMs);
if (msgPtr == IntPtr.Zero)
{
return(null);
}
var msg = Marshal.PtrToStructure <rd_kafka_message>(msgPtr);
byte[] payload = null;
byte[] key = null;
if (msg.payload != IntPtr.Zero)
{
payload = new byte[(int)msg.len];
Marshal.Copy(msg.payload, payload, 0, (int)msg.len);
}
if (msg.key != IntPtr.Zero)
{
key = new byte[(int)msg.key_len];
Marshal.Copy(msg.key, key, 0, (int)msg.key_len);
}
string topic = null;
if (msg.rkt != IntPtr.Zero)
{
topic = Marshal.PtrToStringAnsi(LibRdKafka.topic_name(msg.rkt));
}
LibRdKafka.message_destroy(msgPtr);
var message = new Message()
{
Topic = topic,
Partition = msg.partition,
Offset = msg.offset,
Payload = payload,
Key = key
};
return(new MessageAndError()
{
Message = message,
Error = msg.err
});
}
internal string GetName() => Marshal.PtrToStringAnsi(LibRdKafka.topic_name(handle));