private async Task OpenTwinReceiverLinkAsync(AmqpIoTSession amqpIoTSession, string correlationIdSuffix, TimeSpan timeout)
{
if (_twinReceivingLink == null || _twinReceivingLink.IsClosing())
{
_twinReceivingLink = await amqpIoTSession.OpenTwinReceiverLinkAsync(_deviceIdentity, correlationIdSuffix, timeout).ConfigureAwait(false);
_twinReceivingLink.Closed += (obj, arg) => {
amqpIoTSession.SafeClose();
};
_twinReceivingLink.RegisterTwinListener(OnDesiredPropertyReceived);
if (Logging.IsEnabled)
{
Logging.Associate(this, _twinReceivingLink, $"{nameof(_twinReceivingLink)}");
}
}
}
public async Task EnsureTwinLinksAreOpenedAsync(TimeSpan timeout)
{
if (Volatile.Read(ref _twinLinksOpened) == true)
{
return;
}
if (Logging.IsEnabled)
{
Logging.Enter(this, timeout, $"{nameof(EnsureTwinLinksAreOpenedAsync)}");
}
try
{
await _twinLinksLock.WaitAsync().ConfigureAwait(false);
if (_twinLinksOpened)
{
return;
}
Debug.Assert(_twinSendingLink == null);
Debug.Assert(_twinReceivingLink == null);
string correlationIdSuffix = Guid.NewGuid().ToString();
Task <AmqpIoTReceivingLink> receiveLinkCreator = _amqpIoTSession.OpenTwinReceiverLinkAsync(_deviceIdentity, correlationIdSuffix, timeout);
Task <AmqpIoTSendingLink> sendingLinkCreator = _amqpIoTSession.OpenTwinSenderLinkAsync(_deviceIdentity, correlationIdSuffix, timeout);
await Task.WhenAll(receiveLinkCreator, sendingLinkCreator).ConfigureAwait(false);
_twinSendingLink = sendingLinkCreator.Result;
_twinSendingLink.Closed += OnLinkDisconnected;
_twinReceivingLink = receiveLinkCreator.Result;
_twinReceivingLink.RegisterTwinListener(OnDesiredPropertyReceived);
_twinReceivingLink.Closed += OnLinkDisconnected;
_twinLinksOpened = true;
if (Logging.IsEnabled)
{
Logging.Associate(this, this, _twinReceivingLink, $"{nameof(EnsureTwinLinksAreOpenedAsync)}");
}
if (Logging.IsEnabled)
{
Logging.Associate(this, this, _twinSendingLink, $"{nameof(EnsureTwinLinksAreOpenedAsync)}");
}
}
catch (Exception ex) when(!ex.IsFatal())
{
_twinReceivingLink?.Abort();
_twinSendingLink?.Abort();
_twinReceivingLink = null;
_twinSendingLink = null;
throw;
}
finally
{
_twinLinksLock.Release();
if (Logging.IsEnabled)
{
Logging.Exit(this, timeout, $"{nameof(EnsureTwinLinksAreOpenedAsync)}");
}
}
}