private async static void ReceiveFeedbackAsync()
{
var db = new IsmIoTPortalContext();
while (true)
{
var feedbackBatch = await feedbackReceiver.ReceiveAsync();
if (feedbackBatch == null)
{
continue;
}
//
foreach (FeedbackRecord record in feedbackBatch.Records)
{
// https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messaging#cloud-to-device-messages
// Message is always success, because MQTT clients can't reject C2D Messages
switch (record.OriginalMessageId.Substring(0, 3)) // Substring(0, 3) is the MessageIdPrefix
{
// CMD
case MessageIdPrefix.CMD:
await Task.Factory.StartNew(() => ProcessCmdMessage(record));
break;
default:
break;
}
}
await feedbackReceiver.CompleteAsync(feedbackBatch);
}
}
public async Task ListenForCloud2DeviceCommandFeedback()
{
FeedbackReceiver <FeedbackBatch> feedbackReceiver = _serviceClient.GetFeedbackReceiver();
FeedbackBatch feedbackBatch = await feedbackReceiver.ReceiveAsync(TimeSpan.FromSeconds(5));
if (feedbackBatch == null)
{
return;
}
OnCloud2DeviceCommandFeedback?.Invoke(this, new Cloud2DeviceCommandFeedbackEventArgs($"{String.Join("\n", feedbackBatch.Records.Select(item => item.StatusCode).ToArray())}"));
await feedbackReceiver.CompleteAsync(feedbackBatch);
}
public static async Task receiveMessageFeedback(int listenFor = 100)
{
FeedbackReceiver <FeedbackBatch> feedbackReceiver = serviceClient.GetFeedbackReceiver();
FeedbackBatch feedback = await feedbackReceiver.ReceiveAsync(TimeSpan.FromSeconds(listenFor)).ConfigureAwait(false);
if (feedback != null)
{
Console.WriteLine(
"IotHub has received a message {0}",
string.Join(", ", feedback.Records)
);
}
else
{
Console.WriteLine("IotHub has not received any messages");
}
}
public async Task ReceiveFeedback(CancellationToken cancellationToken)
{
feedbackReceiver = this.client.GetFeedbackReceiver();
while (!cancellationToken.IsCancellationRequested)
{
var feedbackBatch = await feedbackReceiver.ReceiveAsync();
if (feedbackBatch != null)
{
foreach (var record in feedbackBatch.Records)
{
Feedback.Enqueue(record);
}
await feedbackReceiver.CompleteAsync(feedbackBatch);
}
}
}
private static async Task ReceiveFeedback(ServiceClient serviceClient)
{
FeedbackReceiver <FeedbackBatch> feedbackReceiver = serviceClient.GetFeedbackReceiver();
while (true)
{
FeedbackBatch feedbackBatch = await feedbackReceiver.ReceiveAsync();
if (feedbackBatch == null)
{
continue;
}
foreach (FeedbackRecord record in feedbackBatch.Records)
{
string messageId = record.OriginalMessageId;
FeedbackStatusCode statusCode = record.StatusCode;
Console.WriteLine($"Feedback for message '{messageId}', status code: {statusCode}");
}
await feedbackReceiver.CompleteAsync(feedbackBatch);
}
}