同步读取azure服务总线QUEUE消息

Question

下面的代码异步读取消息，但我想一次读取一条消息，然后在第二天或 1 周后读取队列中的下一条消息。 如何同步只读取一条消息，并保留 azure 服务总线队列中消息的 rest 以供下次读取。

enter code here

using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.ServiceBus;

namespace ConsoleApp2
  {
class Program
{
    const string ServiceBusConnectionString = "xxxxxx";
    const string QueueName = "xxx";
    static IQueueClient queueClient;
    public static async Task Main(string[] args)
    {
        queueClient = new QueueClient(ServiceBusConnectionString, QueueName);

        RegisterOnMessageHandlerAndReceiveMessages();

        Console.ReadKey();

        await queueClient.CloseAsync();
    }
    static void RegisterOnMessageHandlerAndReceiveMessages()
    {
        var messageHandlerOptions = new MessageHandlerOptions(ExceptionReceivedHandler)
        {
            MaxConcurrentCalls = 10,
            AutoComplete = false
        };
        queueClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions);
    }
    static async Task ProcessMessagesAsync(Message message, CancellationToken token)
    {
        Console.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
        await queueClient.CompleteAsync(message.SystemProperties.LockToken);
    }
    static Task ExceptionReceivedHandler(ExceptionReceivedEventArgs exceptionReceivedEventArgs)
    {
        Console.WriteLine($"Message handler encountered an exception {exceptionReceivedEventArgs.Exception}.");
        var context = exceptionReceivedEventArgs.ExceptionReceivedContext;
        Console.WriteLine("Exception context for troubleshooting:");
        Console.WriteLine($"- Endpoint: {context.Endpoint}");
        Console.WriteLine($"- Entity Path: {context.EntityPath}");
        Console.WriteLine($"- Executing Action: {context.Action}");
        return Task.CompletedTask;
    }
}

}

Answer 1

您应该能够通过使用MessageReceiver class 来实现这一点。

看一下这个例子的实现细节：

https://github.com/Azure/azure-service-bus/blob/master/samples/DotNet/Microsoft.ServiceBus.Messaging/ReceiveLoop/Program.cs