如何向ActiveMQ队列发送Soap消息？

Question

我正在处理一个发送SOAP请求到第三方Web服务的项目，对于Java开发，我是个新手。目前为止，我有一个基本的代码，可以创建SOAP消息，发送它，并接收响应；该消息包含一个XML文件作为Base64字符串文件。

我使用的代码是有效的，但我需要确保SOAP请求能够在最短的时间内成功传递消息（我有48小时来保证交付），所以如果出现某种网络故障或Web服务不可用，我的代码将产生错误并停止程序的其余部分。

// Create SOAP Connection
        SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance();
        SOAPConnection soapConnection = soapConnectionFactory.createConnection();

        // Send SOAP Message to SOAP Server
        String url = "https://facturaelectronica.dian.gov.co/habilitacion/B2BIntegrationEngine/FacturaElectronica";
        SOAPMessage soapResponse = soapConnection.call(createSOAPRequest(), url);

        // print SOAP Response
        System.out.print("Response SOAP Message:");
        soapResponse.writeTo(System.out);


        soapConnection.close();

我读到过可以将soap请求发送到jms队列，这样就可以确保整个程序在网络故障的情况下仍能正确执行。但据我所知，需要将soap消息转换为jms消息，而我还没有找到如何实现该转换的方法。我发现据说可以使用以下内容来实现转换：

 //Convert SOAP to JMS message.
    Message m = MessageTransformer.SOAPMessageIntoJMSMessage                                                    (soapMessage,session);

基于这份文档：https://docs.oracle.com/cd/E19340-01/820-6767/aeqgk/index.html。

因此，我创建了一个类来调用ToJms进行转换。

import javax.xml.soap.SOAPMessage;
import javax.xml.soap.SOAPPart;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPElement;
import javax.xml.soap.MessageFactory;
import javax.xml.soap.AttachmentPart;
import javax.xml.soap.Name;

import java.net.URL;
import javax.activation.DataHandler;

import com.sun.messaging.Queue;
import com.sun.messaging.xml.MessageTransformer;

import javax.jms.ConnectionFactory;
import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.Message;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.MessageProducer;

/**
 * This example shows how to use the MessageTransformer utility to send SOAP
 * messages with JMS.
 * <p>
 * SOAP messages are constructed with javax.xml.soap API.  The messages
 * are converted with MessageTransformer utility to convert SOAP to JMS
 * message types.  The JMS messages are then published to the JMS topics.
 */
public class ToJms {

    ConnectionFactory        connectionFactory = null;
    Connection               connection = null;
    Session                  session = null;
    Topic                    topic = null;
    Queue                    queue = null;

    MessageProducer          msgProducer = null;
    private static String url = ActiveMQConnection.DEFAULT_BROKER_URL;


    /**
     * default constructor.
     */
    public ToJms(String QueueName) {
        init(QueueName);
    }

    /**
     * Initialize JMS Connection/Session/Topic and Producer.
     */
    public void init(String topicName) {
        try {
//            connectionFactory = new com.sun.messaging.ConnectionFactory();
//            connection = connectionFactory.createConnection(localhost:6161);
            ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
            Connection connection = connectionFactory.createConnection();
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);

            topic = session.createTopic(topicName);
            msgProducer = session.createProducer(topic);
        } catch (JMSException jmse) {
            jmse.printStackTrace();
        }
    }

    /**
     * Send SOAP message with JMS API.
     */
    public void send (SOAPMessage soapMessage) throws Exception {

                /**
         * Convert SOAP to JMS message.
         */
        Message message = MessageTransformer.SOAPMessageIntoJMSMessage( soapMessage, session );

        /**
         * publish JMS message.
         */
        msgProducer.send( message );
    }

    /**
     * close JMS connection.
     */
    public void close() throws JMSException {
        connection.close();
    }

    /**
     * The main program to send SOAP messages with JMS.
     */
    public static void main (String[] args) {

        String topicName = "TestTopic";

        if (args.length > 0) {
            topicName = args[0];
        }
        try {
            ToJms ssm = new ToJms(topicName);
           // ssm.send();
            ssm.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

然后我在我的主类上实现了它：

    ToJms ssm=new ToJms("SoapDian");
    ssm.send(createSOAPRequest());
    ssm.close();

我遇到了以下错误：

Exception in thread "main" java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/xml/messaging/JAXMException at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at xml.ToJms.send(ToJms.java:111) at xml.SoapTest.main(SoapTest.java:42) at xml.xml.main(xml.java:317) at com.summan.datavarprinter.Main.main(Main.java:181)

我在尝试查找oracle指定的库时遇到了许多麻烦，因为Google上有很多不同的结果，我必须尝试很多才能使导入工作。所以我想知道是否有人知道如何使它正常工作，或者是否有更好的解决方案将soap消息发送到activemq队列。谢谢。

- juan jose perez hernandez

Answer 1

我找不到让它工作的方法，所以最终我做的是将SOAP消息转换为字符串，发送到ActiveMQ，然后在消费时进行反向处理。

- juan jose perez hernandez