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我必须使用 Amazon MQ。Amazon MQ 基于 ActiveMQ。我找到了一些代码，它应该在队列中放置一条 blob 消息（PDF 大小 230kB）。但是如果我运行程序，它会在下面的错误堆栈中出错。

这是我的代码：

private final static String WIRE_LEVEL_ENDPOINT = "ssl://<examplednsname>-1.amazonaws.com:61617";
private final static String ACTIVE_MQ_USERNAME = "test123";
private final static String ACTIVE_MQ_PASSWORD = "test123";

public static void sendFileViaQueue(String uri, String queueName) throws JMSException {
    File file = new File("test.pdf");
    ConnectionFactory connectionFactory = null;
    Connection connection = null;
    Session session = null;
    BlobMessage blobMsg = null;
    MessageProducer producer = null;
    try {
        connectionFactory = new ActiveMQConnectionFactory(ACTIVE_MQ_USERNAME, ACTIVE_MQ_PASSWORD, WIRE_LEVEL_ENDPOINT);
        connection = connectionFactory.createConnection();
        connection.start();
        session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
        producer = session.createProducer(session.createQueue(queueName));
        blobMsg = ((ActiveMQSession) session).createBlobMessage(file);
        blobMsg.setStringProperty("FILE.NAME", file.getName());
        blobMsg.setLongProperty("FILE.SIZE", file.length());
        producer.send(blobMsg);
        session.commit();
    } finally {
        closeQuietly(producer);
        closeQuietly(session);
        closeQuietly(connection);
    }
}

似乎它想要将某些内容上传到 8080，但我没有在本地配置任何内容。它只应该将 PDF 上传到队列中。

有没有人想办法解决这个问题？只需将 blob 上传到队列就不会那么复杂。

这是我得到的堆栈跟踪：

javax.jms.JMSException: PUT failed to: http://localhost:8080/uploads/ID:bpSligro-PC-50920-1584558692848-1:1:1:1:1
    at org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:72)
    at org.apache.activemq.command.ActiveMQBlobMessage.onSend(ActiveMQBlobMessage.java:177)
    at org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1952)
    at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:288)
    at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:223)
    at org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessageProducerSupport.java:241)
    at nl.bpittens.mq.AmazonMQExample.sendFileViaQueue(AmazonMQExample.java:81)
    at nl.bpittens.mq.AmazonMQExample.main(AmazonMQExample.java:52)
Caused by: java.io.IOException: PUT failed to: http://localhost:8080/uploads/ID:bpSligro-PC-50920-1584558692848-1:1:1:1:1
    at org.apache.activemq.blob.DefaultBlobUploadStrategy.uploadStream(DefaultBlobUploadStrategy.java:67)
    at org.apache.activemq.blob.DefaultBlobUploadStrategy.uploadFile(DefaultBlobUploadStrategy.java:44)
    at org.apache.activemq.blob.BlobUploader.upload(BlobUploader.java:53)
    at org.apache.activemq.command.ActiveMQBlobMessage.onSend(ActiveMQBlobMessage.java:174)
    ... 6 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
    at sun.net.www.http.HttpClient.New(HttpClient.java:339)
    at sun.net.www.http.HttpClient.New(HttpClient.java:357)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
    at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
    at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
    at org.apache.activemq.blob.DefaultBlobUploadStrategy.uploadStream(DefaultBlobUploadStrategy.java:60)
    ... 9 more

发送正常的 JMSTextMessage没有问题。

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1 回答 1

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如文档中所述，“blob”消息：

允许在一些带外传输机制中发送大量 BLOB（二进制大对象）。可能的带外机制可能是 HTTP 或 FTP 或 SCP 或其他一些点对点协议。

请注意，必须“以某种带外传输机制”发送实际的二进制数据。换句话说，blob 实际上并没有进入队列。Blob 被上传到其他地方，进入队列的消息只是指向该位置。

您需要使用jms.blobTransferPolicy.uploadUrl客户端 URL 上的参数配置传输策略。默认传输策略的默认上传 URLhttp://localhost:8080/uploads/是您的客户端尝试使用的上传二进制数据的 URL。

如果您想将任意大的消息直接发送到队列而不是使用一些带外机制，请考虑迁移到支持该功能的ActiveMQ Artemis。

如果您无法使用 Amazon MQ，那么我认为除了某种手动解决方案之外，您没有任何其他解决方案，您可以将文件分成更小的块，您可以将这些块放入单独的消息中，然后稍后重新组装这些块消费应用程序。

于 2020-03-18T20:10:07.130 回答