如何檢索死信隊列計數？

Question

問題

如何在不接收每條消息並計算我收到多少條消息的情況下獲得死信隊列長度？

我目前的實施

 public int GetDeadLetterQueueCount()
    {
        //Ref:http://stackoverflow.com/questions/22681954/how-do-you-access-the-dead-letter-sub-queue-on-an-azure-subscription

        MessagingFactory factory = MessagingFactory.CreateFromConnectionString(CloudConnectionString);

        QueueClient deadLetterClient = factory.CreateQueueClient(QueueClient.FormatDeadLetterPath(_QueueClient.Path), ReceiveMode.PeekLock);
        BrokeredMessage receivedDeadLetterMessage;

        List<string> lstDeadLetterQueue = new List<string>();

        // Ref: https://code.msdn.microsoft.com/Brokered-Messaging-Dead-22536dd8/sourcecode?fileId=123792&pathId=497121593
        // Log the dead-lettered messages that could not be processed:

        while ((receivedDeadLetterMessage = deadLetterClient.Receive(TimeSpan.FromSeconds(10))) != null)
        {
                lstDeadLetterQueue.Add(String.Format("DeadLettering Reason is \"{0}\" and Deadlettering error description is \"{1}\"",
                receivedDeadLetterMessage.Properties["DeadLetterReason"],
                receivedDeadLetterMessage.Properties["DeadLetterErrorDescription"]));
                var locktime = receivedDeadLetterMessage.LockedUntilUtc;
        }

        return lstDeadLetterQueue.Count;
    }

實施問題

因為我在查看和阻止模式下接收每條消息，所以這些消息設置了鎖定持續時間。 在此期間，在此時間段超時之前，我無法再次接收甚至看到消息。

必須有一種更簡單的方法來獲取計數而不必輪詢隊列？

我也不想消費這些消息，我只想計算總金額。

Answer 1

您可以使用NamespaceManager的 GetQueue() 方法，該方法具有MessageCountDetails屬性，而后者又具有 DeadLetterMessageCount 屬性。 類似的東西：

var namespaceManager = Microsoft.ServiceBus.NamespaceManager.CreateFromConnectionString("<CONN_STRING>");
var messageDetails = namespaceManager.GetQueue("<QUEUE_NAME>").MessageCountDetails;
var deadLetterCount = messageDetails.DeadLetterMessageCount;