public async Task EnableEventReceiveAsync(TimeSpan timeout)
{
if (_closed)
{
throw new IotHubException("Device is now offline.", false);
}
if (Logging.IsEnabled)
{
Logging.Enter(this, timeout, $"{nameof(EnableEventReceiveAsync)}");
}
AmqpIoTSession amqpIoTSession = await EnsureSessionAsync(timeout).ConfigureAwait(false);
bool gain = await _eventReceivingLinkLock.WaitAsync(timeout).ConfigureAwait(false);
if (!gain)
{
throw new TimeoutException();
}
try
{
if (_eventReceivingLink == null || _eventReceivingLink.IsClosing())
{
_eventReceivingLink?.SafeClose();
_eventReceivingLink = await amqpIoTSession.OpenEventsReceiverLinkAsync(_deviceIdentity, timeout).ConfigureAwait(false);
_eventReceivingLink.Closed += (obj, arg) =>
{
amqpIoTSession.SafeClose();
};
_eventReceivingLink.RegisterEventListener(OnEventsReceived);
if (Logging.IsEnabled)
{
Logging.Associate(this, this, _eventReceivingLink, $"{nameof(EnableEventReceiveAsync)}");
}
}
}
finally
{
_eventReceivingLinkLock.Release();
if (Logging.IsEnabled)
{
Logging.Exit(this, timeout, $"{nameof(EnableEventReceiveAsync)}");
}
}
}
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)}");
}
}
}
private async Task OpenMethodsReceiverLinkAsync(AmqpIoTSession amqpIoTSession, string correlationIdSuffix, TimeSpan timeout)
{
if (_methodReceivingLink == null || _methodReceivingLink.IsClosing())
{
_methodReceivingLink?.SafeClose();
_methodReceivingLink = await amqpIoTSession.OpenMethodsReceiverLinkAsync(_deviceIdentity, correlationIdSuffix, timeout).ConfigureAwait(false);
_methodReceivingLink.Closed += (obj, arg) =>
{
amqpIoTSession.SafeClose();
};
_methodReceivingLink.RegisterMethodListener(OnMethodReceived);
Logging.Associate(this, _methodReceivingLink, nameof(_methodReceivingLink));
}
}
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));
}
}