/// <summary>
/// Sends a protobuf message over the underlying stream
/// </summary>
/// <param name="message">The message to send</param>
/// <returns></returns>
/// <exception cref="Exception">Throws an exception if the byte conversion didn't work as expected</exception>
private async Task <int> SendMessage(RequestWrapper message, Connection connection)
{
// Generate a reference id for the message, so we can catch the response
// later on
var refId = GetNextRefId();
message.RefId = refId;
// Convert the message into bytes we can send across the wire
var bytes = message.ToByteArray();
var size = bytes.Length;
var sizeBytes = IntToByteArray(size);
if (sizeBytes.Length != 4)
{
throw new Exception("Expected an int to be converted into 4 bytes. That was not the case.");
}
// Gather the message into one big message, so the message can be send in one go, without something disturbing us
var all = new byte[size + 4];
Buffer.BlockCopy(sizeBytes, 0, all, 0, sizeBytes.Length);
Buffer.BlockCopy(bytes, 0, all, sizeBytes.Length, bytes.Length);
// Actually send the message
await connection.WriteAsync(all);
return(refId);
}