async void CloseIotHubConnection()
{
if (!this.ConnectedToHub)
{
// closure happened before IoT Hub connection was established or it was initiated due to disconnect
return;
}
try
{
this.publishProcessor.Complete();
this.publishPubAckProcessor.Complete();
this.publishPubRecProcessor.Complete();
this.pubRelPubCompProcessor.Complete();
await Task.WhenAll(
this.publishProcessor.Completion,
this.publishPubAckProcessor.Completion,
this.publishPubRecProcessor.Completion,
this.pubRelPubCompProcessor.Completion);
IDeviceClient hub = this.iotHubClient;
this.iotHubClient = null;
await hub.DisposeAsync();
}
catch (Exception ex)
{
MqttIotHubAdapterEventSource.Log.Info("Failed to close IoT Hub Client cleanly.", ex.ToString());
}
}
async void ShutdownOnReceiveError(IChannelHandlerContext context, string exception)
{
this.publishPubAckProcessor.Abort();
this.publishProcessor.Abort();
this.publishPubRecProcessor.Abort();
this.pubRelPubCompProcessor.Abort();
IDeviceClient hub = this.iotHubClient;
if (hub != null)
{
this.iotHubClient = null;
try
{
await hub.DisposeAsync();
}
catch (Exception ex)
{
MqttIotHubAdapterEventSource.Log.Info("Failed to close IoT Hub Client cleanly.", ex.ToString());
}
}
ShutdownOnError(context, "Receive", exception);
}
