我正在开发一个RMI项目,该项目有两个独立的Client和Server项目。我用了启动rmiregistry。当我尝试运行我的服务器应用程序时,我得到一个例外。
public class Runner extends UnicastRemoteObject {
public Runner() throws RemoteException {
try {
ServerOperations so = new ServerSide();
Naming.rebind("rmi://localhost:2000/MiveCoffeeService", so);
System.out.println("Server is online.");
} catch (RemoteException | MalformedURLException | FileNotFoundException ex) {
Logger.getLogger(Runner.class.getName()).log(Level.SEVERE, null, ex);
}
}
public static void main(String[] args) throws RemoteException {
new Runner();
}
}
例外情况是:
Sep 11, 2015 9:05:51 PM ir.nscogroup.coffeemive.Runner <init>
SEVERE: null
java.rmi.MarshalException: error marshalling arguments; nested exception is:
java.io.NotSerializableException: dataaccess.ServerSide
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:177)
at ir.nscogroup.coffeemive.Runner.<init>(Runner.java:29)
at ir.nscogroup.coffeemive.Runner.main(Runner.java:38)
Caused by: java.io.NotSerializableException: dataaccess.ServerSide
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
... 4 more
有什么问题?
答案 0 :(得分:5)
异常堆栈跟踪告诉你完全出了什么问题:
Force stop
您正在尝试序列化一个不可序列化的类dataaccess.ServerSide。解决方案:使您的类和所有必要的组成类实现Serializable接口。
答案 1 :(得分:3)
这里的问题是ServerSide
既不是导出的远程对象也不是Serializable.
几乎可以肯定你是前者,所以你必须要么:
UnicastRemoteObject
或UnicastRemoteObject.exportObject()
。注意不要两者兼得。
答案 2 :(得分:-1)
>> pylon_mex_camera_interface('delete', h)