在Amazon SQS中檢查“無可用消息”的最佳方法？

Question

我正在輪詢Amazon SQS中是否有新消息，並且試圖確定檢查“無可用消息”的最佳方法。

AmazonSQS sqs = new AmazonSQS();  //pseudo code this line
ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest();
receiveMessageRequest.QueueUrl = myQueueUrl;
ReceiveMessageResponse receiveMessageResponse = sqs.ReceiveMessage(receiveMessageRequest);
if (receiveMessageResponse.IsSetReceiveMessageResult())
    {
        //Always TRUE even if there are no untaken messages 
    }

這似乎不能用作檢查“無可用消息”的方法。 對正確的檢查方式有任何想法嗎？ 謝謝！

Answer 1

ReceiveMessageResult r = receiveMessageResponse.ReceiveMessageResult;

if (r.Message.Count < 1)
{
  Console.WriteLine("Can't find any visible messages.");
}