使用Java sdk刪除AWS SQS消息

Question

我正在探索AWS SQS服務。 當嘗試使用java sdk從隊列中刪除消息時，我遇到了一些問題。

隊列在SQS中創建，它有三條消息。 該隊列由AWS S3存儲支持，用於處理大型消息。

以下是通過多次輪詢接收消息的方法。

接收SQS消息：

private static void receiveMessage(String queueUrl) {
        // Receive messages
        ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest(queueUrl).withMaxNumberOfMessages(10)
                .withWaitTimeSeconds(10).withVisibilityTimeout(100);
        List<Message> messages = sqsExtended.receiveMessage(receiveMessageRequest).getMessages();
        System.out.println("Number of mesasges : First poll : " + messages.size());
        while (messages.size() > 0) {
            messages = pollForMessages(messages, receiveMessageRequest, queueUrl);
            System.out.println("Messages in next poll : " + messages.size());
        }
        if (messages.size() > 0) {
            System.out.println("displaying last set of messages ");
            for (int i = 0; i < messages.size(); i++) {
                System.out.println("\nMessage received:");
                System.out.println(" ID: " + messages.get(i).getMessageId());
                System.out.println(" Receipt handle: " + messages.get(i).getReceiptHandle());
                System.out.println("approx. num of messages : "
                        + messages.get(i).getAttributes().get("ApproximateNumberOfMessages"));
                System.out.println(" Message body (first sentence): " + messages.get(i).getBody().substring(0, 56));
                // deleteMessage(messages.get(i), queueUrl);
            }
            deleteMessage(messages, queueUrl);
        }
    }

輪詢消息的方法：

private static List<Message> pollForMessages(List<Message> messages, ReceiveMessageRequest receiveMessageRequest,
            String queueUrl) {
        // display the received messages
        for (int i = 0; i < messages.size(); i++) {
            System.out.println("\nMessage received:");
            System.out.println(" ID: " + messages.get(i).getMessageId());
            System.out.println(" Receipt handle: " + messages.get(i).getReceiptHandle());
            System.out.println(
                    "approx. num of messages : " + messages.get(i).getAttributes().get("ApproximateNumberOfMessages"));
            System.out.println(" Message body (first sentence): " + messages.get(i).getBody().substring(0, 56));
            // deleteMessage(messages.get(i), queueUrl);
        }
        deleteMessage(messages, queueUrl);
        messages = sqsExtended.receiveMessage(receiveMessageRequest).getMessages();
        return messages;
    }

刪除SQS消息：

private static void deleteMessage(List<Message> messages, String queueUrl) {
        // Delete the messages
        for (Message message : messages) {
            DeleteMessageRequest dmr = new DeleteMessageRequest();
            dmr.withQueueUrl(queueUrl).withReceiptHandle(message.getReceiptHandle());
            sqsExtended.deleteMessage(dmr);
            System.out.println("Deleted the message with Id : " + message.getMessageId());
        }

    }

當調用deleteMessage方法時，程序遇到以下異常：

java.lang.AbstractMethodError: com.amazon.sqs.javamessaging.AmazonSQSExtendedClient.deleteMessage(Lcom/

記錄消息：

Apr 21, 2017 5:32:56 PM com.amazon.sqs.javamessaging.ExtendedClientConfiguration setLargePayloadSupportEnabled
INFO: Large-payload support enabled.
Number of mesasges : First poll : 1

Message received:
 ID: f4f00368-b308-4763-84cf-8e33e1931fed
 Receipt handle: AQEBwhLDOIMobJazre1KoSYoMlHajHD1A6j7gZClk1h4FYWAmFd0p6wIFU69rSuhhVdQef+qF6E6RQIQLWaLqS2r0/Kfw3rUrmppIkTcowsVRW36uJ3p4UqnNjZu0cxncNMw78kHfHRej0gwH0gvvMedZXvEimoXUYZq1+K3Gz35etKsUR9EPKuroYaHZ6Aghdu0Osb4cQu+iLxlBrANhFl63762V7EDEEjSeULyQm52wS/OQq7JiktRWFgyGkp/41tHlN3ARB0v2MM3wXaoZMBt8bAyGURXb+Nx+5e3UoSI5J8pQccSwFnk70N1lV7XUswBTk4549uJ0FPlEMoFef6cxeFi1nxEXkfwIJQ9e93wMJUGLnhsx7rNWhS9w6UCVv4yZoARBsMrQbg287LkACLLnw==
approx. num of messages : null
 Message body (first sentence): {
  "Type" : "Notification",
  "MessageId" : "fc1b19bc-6
Exception in thread "main" java.lang.AbstractMethodError: com.amazon.sqs.javamessaging.AmazonSQSExtendedClient.deleteMessage(Lcom/amazonaws/services/sqs/model/DeleteMessageRequest;)Lcom/amazonaws/services/sqs/model/DeleteMessageResult;
    at org.nfjs.aws.sqs.SQSExtendedClient.deleteMessage(SQSExtendedClient.java:149)
    at org.nfjs.aws.sqs.SQSExtendedClient.pollForMessages(SQSExtendedClient.java:139)
    at org.nfjs.aws.sqs.SQSExtendedClient.receiveMessage(SQSExtendedClient.java:108)
    at org.nfjs.aws.sqs.SQSExtendedClient.main(SQSExtendedClient.java:63)

我無法弄清楚異常的原因。 我在上面的代碼片段中使用java sdk缺少任何內容嗎？

在此先感謝您的任何建議。

Answer 1

我自己沒有使用Amazon SQS擴展客戶端庫 ，所以我無法真正判斷細節，但看起來它與AWS Java SDK不同步。

請參閱AmazonSQSExtendedClient.deleteMessage上的Exeption以了解（目前尚未解決的）此問題，以及與Core SDK 1.11.xx不兼容的SQS擴展客戶端庫，以獲得更一般的問題。

后者指向最終有用的支持aws-sdk-java 1.11.8 pull請求，盡管那個現在已經過時了。

Answer 2

從https://github.com/awslabs/amazon-sqs-java-extended-client-lib （下載源代碼並編譯）中挑選庫jar時，SQS消息將被成功刪除。

但是，如果從maven存儲庫中選擇它，則會出現最初發布的問題中提到的問題。

<dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>amazon-sqs-java-extended-client-lib</artifactId>
        <version>1.0.0</version>
</dependency>

我在github（ https://github.com/awslabs/amazon-sqs-java-extended-client-lib/issues/18 ）中提出了同樣的問題。