Question

我想在jms中发送对象消息并获得运行时异常。请建议我可能的解决方案。

JMS代码：

ObjectMessage objMessage = session.createObjectMessage();
        MessageData data = new MessageData();
        objMessage.setObject(data);
        sender.send(objMessage);

在控制台上找到异常：

    log4j:WARN No appenders could be found for logger         org.jboss.remoting.transport.socket.MicroSocketClientInvoker).
    log4j:WARN Please initialize the log4j system properly.
    java.lang.RuntimeException: com.test.SendJMSMessage
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.jboss.messaging.util.StreamUtils.writeObject(StreamUtils.java:249)
at org.jboss.jms.message.JBossObjectMessage.doWriteObject(JBossObjectMessage.java:141)
at org.jboss.messaging.core.impl.message.MessageSupport.getPayloadAsByteArray(MessageSupport.java:216)
at org.jboss.jms.message.JBossObjectMessage.setObject(JBossObjectMessage.java:118)
at org.jboss.jms.message.ObjectMessageProxy.setObject(ObjectMessageProxy.java:59)
at com.test.SendJMSMessage.example(SendJMSMessage.java:36)
at com.test.SendJMSMessage.main(SendJMSMessage.java:130)

在创建新的MessageData类代替创建子类MessageData之后，当我运行代码时，我得到了如下异常：

18:26:08,297 ERROR [JmsGatewayListener] Problems invoking method <process>
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.soa.esb.listeners.gateway.JmsGatewayListener.doRun(JmsGatewayListener.java:161)
at org.jboss.soa.esb.listeners.lifecycle.AbstractThreadedManagedLifecycle.run(AbstractThreadedManagedLifecycle.java:115)
at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.RuntimeException: No ClassLoaders found for: com.test.MessageData
at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.io.ObjectInputStream.resolveClass(Unknown Source)
at org.jboss.messaging.util.ObjectInputStreamWithClassLoader.resolveClass(ObjectInputStreamWithClassLoader.java:78)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.jboss.messaging.util.StreamUtils.readObject(StreamUtils.java:154)
at org.jboss.messaging.core.impl.message.MessageSupport.readPayload(MessageSupport.java:405)
at org.jboss.jms.message.JBossObjectMessage.getObject(JBossObjectMessage.java:126)
at org.jboss.jms.message.ObjectMessageProxy.getObject(ObjectMessageProxy.java:68)
at org.jboss.soa.esb.listeners.gateway.PackageJmsMessageContents.setESBMessageBody(PackageJmsMessageContents.java:165)
at org.jboss.soa.esb.listeners.gateway.PackageJmsMessageContents.process(PackageJmsMessageContents.java:89)
... 7 more

这里我试图将对象消息发送到esb服务器代码。有关控制台窗口的建议吗？

Answer 1

例外是在“另一边”：

at java.io.ObjectInputStream.resolveClass(Unknown Source)
at org.jboss.messaging.util.ObjectInputStreamWithClassLoader.resolveClass(ObjectInputStreamWithClassLoader.java:78)

所以您确实发送了邮件，但是您无法在另一端反序列化它。为什么？因为“另一方”在其类路径中没有MessageData的类定义。如果它是一个不同的应用程序，您需要将MessageData提取到一个公共jar并将它包含在两个应用程序中。

序列化并不神奇;序列化和反序列化的一方必须能够访问相同的类定义（.class文件），并且它们的版本必须相同，或者至少是兼容的。

Answer 2

您的MessageData类需要实现java.io.Serializable。这可能是问题吗？应该有一个额外的“原因”异常堆栈跟踪。

JMS - 发送对象消息

2 个答案: