private async Task OpenMethodsSenderLinkAsync(AmqpIotSession amqpIotSession, string correlationIdSuffix, CancellationToken cancellationToken)
{
if (_methodSendingLink == null ||
_methodSendingLink.IsClosing())
{
_methodSendingLink?.SafeClose();
_methodSendingLink = await amqpIotSession
.OpenMethodsSenderLinkAsync(_deviceIdentity, correlationIdSuffix, cancellationToken)
.ConfigureAwait(false);
if (_methodSenderLinkDisconnected == null)
{
_methodSenderLinkDisconnected = (obj, arg) =>
{
amqpIotSession.SafeClose();
};
}
_methodSendingLink.Closed += _methodSenderLinkDisconnected;
if (Logging.IsEnabled)
{
Logging.Associate(this, _methodSendingLink, nameof(_methodSendingLink));
}
}
}
private async Task OpenTwinReceiverLinkAsync(AmqpIotSession amqpIotSession, string correlationIdSuffix, CancellationToken cancellationToken)
{
if (_twinReceivingLink == null ||
_twinReceivingLink.IsClosing())
{
_twinReceivingLink?.SafeClose();
_twinReceivingLink = await amqpIotSession
.OpenTwinReceiverLinkAsync(_deviceIdentity, correlationIdSuffix, cancellationToken)
.ConfigureAwait(false);
if (_twinReceiverLinkDisconnected == null)
{
_twinReceiverLinkDisconnected = (obj, arg) =>
{
amqpIotSession.SafeClose();
};
}
_twinReceivingLink.Closed += _twinReceiverLinkDisconnected;
_twinReceivingLink.RegisterTwinListener(OnDesiredPropertyReceived);
if (Logging.IsEnabled)
{
Logging.Associate(this, _twinReceivingLink, nameof(_twinReceivingLink));
}
}
}
public async Task EnableEventReceiveAsync(CancellationToken cancellationToken)
{
if (_closed)
{
throw new IotHubException("Device is now offline.", false);
}
if (Logging.IsEnabled)
{
Logging.Enter(this, nameof(EnableEventReceiveAsync));
}
AmqpIotSession amqpIotSession = await EnsureSessionIsOpenAsync(cancellationToken).ConfigureAwait(false);
try
{
await _eventReceivingLinkSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
throw new TimeoutException("Failed to enter the semaphore required for ensuring that AMQP event receiver links are open.");
}
try
{
if (_eventReceivingLink == null ||
_eventReceivingLink.IsClosing())
{
_eventReceivingLink?.SafeClose();
_eventReceivingLink = await amqpIotSession
.OpenEventsReceiverLinkAsync(_deviceIdentity, cancellationToken)
.ConfigureAwait(false);
if (_eventReceiverLinkDisconnected == null)
{
_eventReceiverLinkDisconnected = (obj, arg) =>
{
amqpIotSession.SafeClose();
};
}
_messageReceivingLink.Closed += _eventReceiverLinkDisconnected;
_eventReceivingLink.RegisterEventListener(OnEventsReceived);
if (Logging.IsEnabled)
{
Logging.Associate(this, this, _eventReceivingLink, nameof(EnableEventReceiveAsync));
}
}
}
finally
{
_eventReceivingLinkSemaphore.Release();
if (Logging.IsEnabled)
{
Logging.Exit(this, nameof(EnableEventReceiveAsync));
}
}
}
private async Task OpenMethodsSenderLinkAsync(AmqpIotSession amqpIotSession, string correlationIdSuffix, TimeSpan timeout)
{
if (_methodSendingLink == null || _methodSendingLink.IsClosing())
{
_methodSendingLink?.SafeClose();
_methodSendingLink = await amqpIotSession.OpenMethodsSenderLinkAsync(_deviceIdentity, correlationIdSuffix, timeout).ConfigureAwait(false);
_methodSendingLink.Closed += (obj, arg) =>
{
amqpIotSession.SafeClose();
};
Logging.Associate(this, _methodSendingLink, nameof(_methodSendingLink));
}
}
private async Task OpenTwinReceiverLinkAsync(AmqpIotSession amqpIotSession, string correlationIdSuffix, TimeSpan timeout)
{
if (_twinReceivingLink == null || _twinReceivingLink.IsClosing())
{
_twinReceivingLink?.SafeClose();
_twinReceivingLink = await amqpIotSession
.OpenTwinReceiverLinkAsync(_deviceIdentity, correlationIdSuffix, timeout)
.ConfigureAwait(false);
_twinReceivingLink.Closed += (obj, arg) =>
{
amqpIotSession.SafeClose();
};
_twinReceivingLink.RegisterTwinListener(OnDesiredPropertyReceived);
Logging.Associate(this, _twinReceivingLink, nameof(_twinReceivingLink));
}
}
private async Task EnsureMessageReceivingLinkIsOpenAsync(TimeSpan timeout, bool enableCallback = false)
{
if (_closed)
{
throw new IotHubException("Device is now offline.", false);
}
Logging.Enter(this, timeout, nameof(EnsureMessageReceivingLinkIsOpenAsync));
AmqpIotSession amqpIotSession = await EnsureSessionIsOpenAsync(timeout).ConfigureAwait(false);
bool enteredSemaphore = await _messageReceivingLinkSemaphore.WaitAsync(timeout).ConfigureAwait(false);
if (!enteredSemaphore)
{
throw new TimeoutException("Failed to enter the semaphore required for ensuring that AMQP message receiver links are open.");
}
try
{
if (_messageReceivingLink == null || _messageReceivingLink.IsClosing())
{
_messageReceivingLink?.SafeClose();
_messageReceivingLink = await amqpIotSession.OpenMessageReceiverLinkAsync(_deviceIdentity, timeout).ConfigureAwait(false);
_messageReceivingLink.Closed += (obj, arg) =>
{
amqpIotSession.SafeClose();
};
Logging.Associate(this, this, _messageReceivingLink, nameof(EnsureMessageReceivingLinkIsOpenAsync));
}
if (enableCallback)
{
_messageReceivingLink.RegisterReceiveMessageListener(OnDeviceMessageReceived);
}
}
finally
{
_messageReceivingLinkSemaphore.Release();
Logging.Exit(this, timeout, nameof(EnsureMessageReceivingLinkIsOpenAsync));
}
}
internal async Task <AmqpIotSession> EnsureSessionIsOpenAsync(TimeSpan timeout)
{
if (_closed)
{
throw new IotHubException("Device is now offline.", false);
}
Logging.Enter(this, timeout, nameof(EnsureSessionIsOpenAsync));
bool enteredSemaphore = await _sessionSemaphore.WaitAsync(timeout).ConfigureAwait(false);
if (!enteredSemaphore)
{
throw new TimeoutException("Failed to enter the semaphore required for opening an AMQP session.");
}
try
{
if (_amqpIotSession == null || _amqpIotSession.IsClosing())
{
_amqpIotSession?.SafeClose();
_amqpIotSession = await _amqpConnectionHolder.OpenSessionAsync(_deviceIdentity, timeout).ConfigureAwait(false);
Logging.Associate(this, _amqpIotSession, nameof(_amqpIotSession));
if (_deviceIdentity.AuthenticationModel == AuthenticationModel.SasIndividual)
{
_amqpAuthenticationRefresher = await _amqpConnectionHolder.CreateRefresherAsync(_deviceIdentity, timeout).ConfigureAwait(false);
Logging.Associate(this, _amqpAuthenticationRefresher, nameof(_amqpAuthenticationRefresher));
}
_amqpIotSession.Closed += OnSessionDisconnected;
_messageSendingLink = await _amqpIotSession.OpenTelemetrySenderLinkAsync(_deviceIdentity, timeout).ConfigureAwait(false);
_messageSendingLink.Closed += (obj, arg) =>
{
_amqpIotSession.SafeClose();
};
Logging.Associate(this, _messageSendingLink, nameof(_messageSendingLink));
}
if (_disposed)
{
throw new IotHubException("Device is now offline.", false);
}
}
catch (Exception)
{
Cleanup();
throw;
}
finally
{
_sessionSemaphore.Release();
}
Logging.Exit(this, timeout, nameof(EnsureSessionIsOpenAsync));
return(_amqpIotSession);
}