Azure 服務總線：如何更新鎖？

Question

如何更新接收隊列消息處理程序的鎖定？ 在事件處理程序上，測試消息沒有更新鎖定屬性。

Message testMessage;

https://docs.microsoft.com/en-us/dotnet/api/microsoft.servicebus.messaging.brokeredmessage.renewlock?view=azure-dotnet

Answer 1

您在上面發布的 RenewLock api 鏈接來自舊的已棄用的 WindowsAzure.ServiceBus nuget 包，其中 RenewLock 方法是 BrokeredMessage 的一部分。

當前包 Microsoft.Azure.ServiceBus（您正確使用）將 RenewLockAsync 方法作為接收器的一部分https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.servicebus.core.messagereceiver .renewlockasync?view=azure-dotnet 。 您可以從 QueueClient 實例調用該方法，例如queueClient.RenewLockAsync(testMessage)或queueClient.RenewLockAsync(message.SystemProperties.LockToken) 。

但是，您可以通過設置 MessageHandlerOptions 的 MaxAutoRenewDuration 屬性來利用自動更新鎖定功能，而不是手動進行繁重的工作。 在本例中，這將在方法 RegisterOnMessageHandlerAndReceiveMessages 中。

        static void RegisterOnMessageHandlerAndReceiveMessages()
        {
            // Configure the MessageHandler Options in terms of exception handling, number of concurrent messages to deliver etc.
            var messageHandlerOptions = new MessageHandlerOptions(ExceptionReceivedHandler)
            {
                // Maximum number of Concurrent calls to the callback `ProcessMessagesAsync`, set to 1 for simplicity.
                // Set it according to how many messages the application wants to process in parallel.
                MaxConcurrentCalls = 1,

                // Indicates whether MessagePump should automatically complete the messages after returning from User Callback.
                // False below indicates the Complete will be handled by the User Callback as in `ProcessMessagesAsync` below.
                AutoComplete = false,

                // https://docs.microsoft.com/en-us/azure/service-bus-messaging/message-transfers-locks-settlement#peeklock
                MaxAutoRenewDuration = <some timespan>
            };

            // Register the function that will process messages
            queueClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions);
        }

Answer 2

目前，建議使用 Azure.Messaging.ServiceBus NuGet 包，因為 Microsoft.Azure.ServiceBus 已過時。 這是自動更新處理消息的示例代碼：

var client = new ServiceBusClient(connectionString);
var processor = client.CreateProcessor(queueName, new ServiceBusProcessorOptions
{
    MaxAutoLockRenewalDuration = TimeSpan.FromHours(100),
});
processor.ProcessMessageAsync += async arg =>
{
    //process your message
    await Task.Delay(Timeout.Infinite);
};
processor.ProcessErrorAsync += async arg =>
{
    //process errors
};