Amazon SQS和Alpine SQS Spring Boot中批量消费消息

Question

我已经配置了SQS监听器以消耗消息列表，但我一次只收到一条消息，并且出现了错误：“无法将model.StudentData转换为java.util.ArrayList的实例”。

我的代码如下：

@SqsListener(value = "${queueName}", deletionPolicy = SqsMessageDeletionPolicy.NEVER)
    public void receiveMessage(final StudentData studentData,
                               @Header("SenderId") final String senderId, final Acknowledgment acknowledgment) {

        // business logic
        acknowledgment.acknowledge();
    }

任何关于如何配置 SQS 监听器以消费多个消息的建议都会受到赞赏。

感谢您的帮助。

- Deepak

Answer 1

上述问题的解决方案是：

final ExecutorService executorService = Executors.newSingleThreadExecutor();
        executorService.execute(() -> {
        while (true) {
            final String queueUrl = amazonSqs.getQueueUrl("enter your queue name").getQueueUrl();
            final var receiveMessageRequest = new ReceiveMessageRequest(queueUrl)
                    .withWaitTimeSeconds(20);

            List<Message> messages = amazonSqs.receiveMessage(receiveMessageRequest).getMessages();

            while (messages.size() > 0) {
                for (final Message queueMessage : messages) {
                    try {
                        String message = queueMessage.getBody();
                        amazonSqs.deleteMessage(new DeleteMessageRequest(queueUrl, queueMessage
                                .getReceiptHandle()));
                    } catch (Exception e) {
                        log.error("Received message with errors " + e);
                    }
                }
                messages = amazonSqs.receiveMessage(new ReceiveMessageRequest(queueUrl)).getMessages();
            }
        }
    });
        executorService.shutdown();

- Deepak

Answer 2

SQS监听器注释提供了最简单的配置，它将逐个消费消息。这种限制直接来自Spring的QueueMessagingTemplate。

要消费批次，您可以直接使用AmazonSQS客户端。

    @Autowire AmazonSQSAsync amazonSqs;
    ...

    String queueUrl = amazonSqs.getQueueUrl("queueName").getQueueUrl();
    ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest();
    receiveMessageRequest.setQueueUrl(queueUrl);
    receiveMessageRequest.setWaitTimeSeconds(10); // Listener for messages in the next 10 seconds
    receiveMessageRequest.setMaxNumberOfMessages(1000); // If 10000 messages are read stop listening
    ReceiveMessageResult receiveMessageResult = amazonSqs.receiveMessage(receiveMessageRequest);
    receiveMessageResult.getMessages(); // batch of messages

- Borislav Stoilov

---

setMaxNumberOfMessages 只允许设置1到10之间的值。因此，这段代码很可能无法按预期工作。还请查看 JavaDoc 类 ReceiveMessageRequest。 - Oliver Marienfeld