我在SQS中有多条消息。以下代码总是只返回一个,即使有几十个可见(不在飞行中)。 setMaxNumberOfMessages我以为会允许多个消费立即..我误解了这一点?从SQS中检索多条消息
CreateQueueRequest createQueueRequest = new CreateQueueRequest().withQueueName(queueName);
String queueUrl = sqs.createQueue(createQueueRequest).getQueueUrl();
ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest(queueUrl);
receiveMessageRequest.setMaxNumberOfMessages(10);
List<Message> messages = sqs.receiveMessage(receiveMessageRequest).getMessages();
for (Message message : messages) {
// i'm a message from SQS
}
我使用withMaxNumberOfMessages没有任何这样的运气也试过:
receiveMessageRequest.withMaxNumberOfMessages(10);
我怎么知道有消息在队列中?超过1?
Set<String> attrs = new HashSet<String>();
attrs.add("ApproximateNumberOfMessages");
CreateQueueRequest createQueueRequest = new CreateQueueRequest().withQueueName(queueName);
GetQueueAttributesRequest a = new GetQueueAttributesRequest().withQueueUrl(sqs.createQueue(createQueueRequest).getQueueUrl()).withAttributeNames(attrs);
Map<String,String> result = sqs.getQueueAttributes(a).getAttributes();
int num = Integer.parseInt(result.get("ApproximateNumberOfMessages"));
上面总是先运行,并给了我一个int
是> 1个
感谢您的输入
您参考链接现在不工作,请你更新呢?我想这是http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/sqs/AmazonSQSClient.html#receiveMessage(java.lang.String) – coderz 2015-04-27 09:40:51