Question

我有一个Azure服务总线队列。当我将文件发送到此队列时，它将进入死信队列。当我尝试将消息（文件）从DLQ重新提交到其原始队列时，它再次返回到DLQ，但现在该文件的内容正在获取垃圾邮件。任何人都能帮助我吗？

重新提交的代码如下。

string connectionString = ConfigurationManager.AppSettings["connectionString"];

string queueName = ConfigurationManager.AppSettings["deadLetterQueueName"];

ServiceBusConnectionStringBuilder builder = new  ServiceBusConnectionStringBuilder(connectionString);

MessagingFactory factory = MessagingFactory.CreateFromConnectionString(builder.ToString());

var client = QueueClient.CreateFromConnectionString(connectionString, queueName);

string queueDeadletterPath = QueueClient.FormatDeadLetterPath(queueName);

QueueClient deadletterQueueClient = factory.CreateQueueClient(queueDeadletterPath);


            while (true)
            {
                BrokeredMessage msg = deadletterQueueClient.Receive();
                if (msg != null)
                {
                    try
                    {
                        if(msg.Label == "Resubmitted")
                        {
                            msg.Complete();
                        }
                        else
                        {
                            BrokeredMessage sendMsgBackToQueue = new BrokeredMessage(msg);
                            foreach(var prop in msg.Properties)
                            {
                                var targetProp = new KeyValuePair<string, object>(prop.Key, prop.Value);
                                sendMsgBackToQueue.Properties.Add( targetProp);
                            }
                            sendMsgBackToQueue.Label = "Resubmitted";
                            Console.WriteLine("Message Resubmitted");
                            client.SendAsync(sendMsgBackToQueue);
                            msg.Complete();
                        }
                    }
                    catch (Exception ex)
                    {
                        // Log error
                        Console.WriteLine(ex.Message);
                        msg.Abandon();
                    }
                }
                else
                {
                    break;
                }
            }

Screenshot

Answer 1

您使用BrokeredMessage(serializedObject)的构造函数假定您传入的内容是要序列化的有效负载（消息正文），而不是克隆信息的消息。

ASB SDK专门用于BrokeredMessage.Clone()。

注意：注意到您正在混合异步和同步呼叫。无论ASB如何，这都会让您陷入困境。可能希望切换到同步或使用await进行适当的异步调用。

Azure Service Bus DeadLetter队列

1 个答案: