public async Task <IEnumerable <byte> > TransceiveAsync(byte[] request, CancellationToken cancellationToken)
{
try
{
return(await _serialPortTransceiverImplementation.TransceiveAsync(request, cancellationToken));
}
catch (Exception first)
{
try
{
return(await _serialPortTransceiverImplementation.TransceiveAsync(request, cancellationToken));
}
catch (Exception second)
{
throw new AggregateException(first, second);
}
}
}
public async Task <IEnumerable <byte> > TransceiveAsync(byte[] request, CancellationToken cancellationToken)
{
var differenceWithStamp = _lastRequestStamp + _minimalTime - DateTime.Now;
if (differenceWithStamp > TimeSpan.Zero)
{
await Task.Delay(differenceWithStamp, cancellationToken);
}
try
{
return(await _serialPortTransceiverImplementation.TransceiveAsync(request, cancellationToken));
}
finally
{
_lastRequestStamp = DateTime.Now;
}
}
public async Task <IEnumerable <byte> > TransceiveAsync(byte[] request, CancellationToken cancellationToken)
{
var wasOpenBefore = _inner.IsOpen;
if (!wasOpenBefore)
{
_inner.Open();
}
var result = await _inner.TransceiveAsync(request, cancellationToken);
if (PortMustBeClosed(wasOpenBefore))
{
_inner.Close();
}
return(result);
}
public async Task <IEnumerable <byte> > TransceiveAsync(byte[] request, CancellationToken cancellationToken)
{
var transceivingTaskTokenSource = new CancellationTokenSource();
cancellationToken.Register(transceivingTaskTokenSource.Cancel);
var cancelTask = Task
.Delay(_maxResponseTime, transceivingTaskTokenSource.Token)
.ContinueWith(_ => Enumerable.Empty <byte>(), transceivingTaskTokenSource.Token);
var transceivingTask = _transceiver.TransceiveAsync(request, transceivingTaskTokenSource.Token);
var completed = await Task.WhenAny(cancelTask, transceivingTask);
if (completed == cancelTask && !transceivingTask.IsCompleted)
{
transceivingTaskTokenSource.Cancel();
}
return(await completed);
}
public async Task <IEnumerable <byte> > TransceiveAsync(byte[] request, CancellationToken cancellationToken) => await _inner.TransceiveAsync(request, cancellationToken);