Exception... java.io.NotSerializableException (RMI)

Question

hi,
I use a remote object <remoteObjOne> (already registered on the server) to create and register, there, (on the server) a second remote object <remoteObjTwo> .
To do this I call a method of <remoteObjOne> (already registered on the server):
public void buildRemoteDbConnectionOnTheServer(String objName){
     MyClass myClass = new MyClass();
     // MyClass is coded on the server
        try {
            Naming.rebind(objName, myClass); // put in the registry the object.
        } catch (Exception e) {
            System.out.println("buildRemoteDbConnectionOnTheServer erro registering remote obj " + e.getMessage());
}When the statement :
Naming.rebind(objName, myClass);is executed I get this error:
error marshalling arguments; nested exception is:
        java.io.NotSerializableException: MyClass.I would understand what appen and to know how I can manage this error.
Any help shall be appreciated
thank you
regards
tonyMrsangelo

Answer 1

There are several errors here.
1. MyClass is not exported. Does it extend UnicastRemoteObject?
2. You can't bind to a remote registry, only to a registry in the local host. Callbacks have to be registered at the server via a specific remote method that takes the callback interface as a parameter. The server has to store that somewhere and use that to callback the client. In any case the design of using the Registry assumes that there is only one client, which is a broken design in the first place.
3. Callbacks don't work over the Internet without a lot of additional mucking around, usually involving 3rd-party products such as mine. Are you aware of that?