Question

我有一个RMI的远程接口：

public interface JMXManager extends Remote {

    public MFSMBeanServerConnection getMBeanServerConnection(String className)
            throws RemoteException;
    }
}

我为了序列化MBeanServerConnection而创建的

MFSMBeanServerConnection和MFSMBeanServerConnectionImpl：

public interface MFSMBeanServerConnection extends Serializable {
     public MBeanServerConnection getMBeanServerConnection();
}

public class MFSMBeanServerConnectionImpl implements MFSMBeanServerConnection {

    private static final long serialVersionUID = 1006978249744538366L;
    /**
     * @serial
     */
    private MBeanServerConnection mBeanServerConnection;

    public MFSMBeanServerConnectionImpl() {}

    public MFSMBeanServerConnectionImpl(MBeanServerConnection mBeanServerConnection) {
        this.mBeanServerConnection = mBeanServerConnection;
    }

    public MBeanServerConnection getMBeanServerConnection() {
        return mBeanServerConnection;
    }

    private void readObject(ObjectInputStream aInputStream) throws ClassNotFoundException,
            IOException {
        aInputStream.defaultReadObject();
        mBeanServerConnection = (MBeanServerConnection) aInputStream.readObject();
    }

    private void writeObject(ObjectOutputStream aOutputStream) throws IOException {
        aOutputStream.defaultWriteObject();
        aOutputStream.writeObject(mBeanServerConnection);
    }

    private void readObjectNoData() throws ObjectStreamException {

    }
}

在客户端我有

JMXManager jmxm= (JMXManager) registry.lookup("JMXManager");  
MFSMBeanServerConnection mfsMbsc = jmxm.getMBeanServerConnection(className);

在第二行我得到一个例外：

java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:173)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
at $Proxy0.getMBeanServerConnection(Unknown Source)

我的目标是创建一个RMI服务器：

由存储其MBeanServerConnection的一个或多个JMX服务器使用
客户端接受一个MBeanServerConnection并使用（操作）其MBean

我做错了什么？如何序列化javax.management.MBeanServerConnection以便我可以将它与远程接口一起使用？

Answer 1

我认为序列化MBeanServerConnection是一个坏主意，因为它应该存储大量的运行时信息/一些在反序列化时无法使用或无效的信息。

它认为这是其所有已知的SubInterfaces（MBeanServer，MBeanServerForwarder）也不实现Serializable的原因。

序列化MBeanServerConnection以便由RMI的远程方法返回

1 个答案: