2

我从我在 azure 中设置的队列接收消息时遇到问题。我之前使用相同的代码成功地完成了此操作，但现在当我尝试获取消息时我只是得到空值。当我在 azure 管理控制台中查看队列时，我清楚地看到队列包含 5 条消息。

这是代码：

ServiceBus SB = new ServiceBus();
Microsoft.ServiceBus.Messaging.BrokeredMessage message;
while (true)
{
    message = SB.ReceiveMessage("orders");
    if (message == null)
    {
        break;
    }
    Procurement.Order order = message.GetBody<Procurement.Order>();
    order.id = Guid.NewGuid().ToString();
    order.remindercount = 0;

    using (DbManager db = new DbManager())
    {
        if (db.SetSpCommand("CreateOrderHead",
            db.Parameter("@companyId", order.companyId),
            db.Parameter("@orderId", order.orderId),
            db.Parameter("@suppliercode", order.suppliercode),
            db.Parameter("@supplierorderId", order.supplierorderId),
            db.Parameter("@orderdate", order.orderdate),
            db.Parameter("@desireddate", order.desireddate),
            db.Parameter("@ordertext", order.ordertext),
            db.Parameter("@name", order.name),
            db.Parameter("@street", order.street),
            db.Parameter("@zip", order.zip),
            db.Parameter("@city", order.city),
            db.Parameter("@country", order.country),
            db.Parameter("@countrycode", order.countrycode),
            db.Parameter("@deliveryterms", order.deliveryterms),
            db.Parameter("@reference", order.reference),
            db.Parameter("@deliveryinstruction", order.deliveryinstruction),
            db.Parameter("@id", order.id),
            db.Parameter("@partycode", order.partyCode)
            ).ExecuteNonQuery() == 1)
        {
            message.Complete();
            message = null;
        }

        db.SetSpCommand("DeleteOrderRows",
            db.Parameter("@orderid", order.orderId),
            db.Parameter("@companyId", order.companyId)
            ).ExecuteNonQuery();

        foreach (Procurement.Orderrow r in order.Orderrows)
        {
            db.SetSpCommand("CreateOrderRow",
            db.Parameter("@companyId", r.companyId),
            db.Parameter("@orderId", r.orderId),
            db.Parameter("@orderrowId", r.orderrowId),
            db.Parameter("@itemId", r.itemId),
            db.Parameter("@itemdesc", r.itemdesc),
            db.Parameter("@orderqty", r.orderqty),
            db.Parameter("@desireddate", r.desireddate),
            db.Parameter("@rowtext", r.rowtext),
            db.Parameter("@supplieritemId", r.supplieritemId),
            db.Parameter("@unit", r.unit),
            db.Parameter("@id", order.id),
            db.Parameter("@unitprice", r.unitprice),
            db.Parameter("@rowprice", r.rowprice)
            ).ExecuteNonQuery();
        }
    }
}
Thread.Sleep(new TimeSpan(0, 1, 0));

这是 ServiceBus 类：

public class ServiceBus
{
    TokenProvider TokenProvider;
    MessagingFactory Factory;

    public ServiceBus()
    {
        TokenProvider = TokenProvider.CreateSharedSecretTokenProvider(GetIssuerName(), GetSecret());
        Factory = MessagingFactory.Create(
            GetURINameSpace(),
            TokenProvider
            );
    }

    public void SendMessage(string queue, BrokeredMessage message)
    {
        var client = Factory.CreateQueueClient(queue);
        client.Send(message);
    }

    public BrokeredMessage ReceiveMessage(string queue)
    {
        var client = Factory.CreateQueueClient(queue, ReceiveMode.ReceiveAndDelete);
        BrokeredMessage message = client.Receive();
        return message;
    }

    private static Uri GetURINameSpace()
    {
        return ServiceBusEnvironment.CreateServiceUri("sb", GetNamespace(), string.Empty);
    }

    private static string GetNamespace()
    {
        return "Namespace i have verified its the right one";
    }

    private static string GetIssuerName()
    {
        return "Issuer i have verified its the right one";
    }

    private static string GetSecret()
    {
        return "Key i have verified its the right one";
    }
}

我认为这应该很简单，但我不知道我做错了什么。它可能是我缺少的一些小东西......

无论如何，提前谢谢！

4

2 回答 2

4

您在 SubcriptionDescription.MessageCount 中看到的那些 BrokeredMessages 不仅是常规消息，而且是 $DeadLetterQueue-sub 队列中的消息计数！！！

使用此代码片段从该子队列中检索所有消息并打印出它们的详细信息。将 [topic] 和 [subscription] 重命名为您的实际名称：

MessagingFactory msgFactory = MessagingFactory.Create(_uri, _tokenProvider);
        MessageReceiver msgReceiver = msgFactory.CreateMessageReceiver("[topic]/subscriptions/[subscription]/$DeadLetterQueue", ReceiveMode.PeekLock);

        while (true)
        {
            BrokeredMessage msg = msgReceiver.Receive();

            if (msg != null)
            {
                Console.WriteLine("Deadlettered message.");

                Console.WriteLine("MessageId:                  {0}", msg.MessageId);
                Console.WriteLine("DeliveryCount:              {0}", msg.DeliveryCount);
                Console.WriteLine("EnqueuedTimeUtc:            {0}", msg.EnqueuedTimeUtc);
                Console.WriteLine("Size:                       {0} bytes", msg.Size);
                Console.WriteLine("DeadLetterReason:           {0}",
                    msg.Properties["DeadLetterReason"]);
                Console.WriteLine("DeadLetterErrorDescription: {0}",
                    msg.Properties["DeadLetterErrorDescription"]);
                Console.WriteLine();
                msg.Complete();
            }
        }
于 2012-01-25T17:22:34.257 回答
1

此问题的解决方案是 azure management-portal 中的一个错误，使其在队列中显示错误数量的消息，或者消息以某种方式被标记，因此它们不会被读取。换句话说，它一直有效，我只需要向队列中添加一些新消息。

于 2011-12-29T20:35:35.053 回答