[opencms-dev] can not get RMI stub registered in tomcat from standalone application

[jim]

hi all,
    I am trying to register a rmi service inside tomcat,so that it will be in the same application context as opencms and can use the object CmsObject to fulfill my request,This following is what I do for test purpose:
    1,create IOpencms.java like this
      IOPencms.java
        /*
     
/*
 * Created on 2005-9-29
 *
 */
import java.rmi.*;

/**
 * @author jimw
 *
 * mailto:jimingwei780225 at hotmail.com
 */
public interface IOpencms extends java.rmi.Remote {
    public void sayHello()throws RemoteException;

}
    2,create implementation class
    
import java.net.*;

import java.rmi.*;

import java.rmi.registry.*;

import java.rmi.server.*;

public class Opencms extends UnicastRemoteObject implements IOpencms{
 public Opencms()throws RemoteException{}
 public void sayHello()throws RemoteException{
  System.out.println("hello,world");
 }
}
    3,create stub and skeleton
    Opencms_Skel.class Opencms_Stub.class
    4,create a Servlet that will be started once the opencms app is deployed .
    the following code is in its init() method.
    try {
            // TODO Auto-generated constructor stub
          
            Registry registry=LocateRegistry.createRegistry(6666);
            
            System.out.println("I am fine");
            registry.bind("opencms0",new Opencms_Stub());
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    5,modify web.xml and restart tomcat,everything works file in tomcat.Up to now,everything is ok.
    Pay attention to the following:
    6,then I created a standalone client to test.
    

public static void main(String[] args)throws Exception {
        try {
           
            
            Registry registry=LocateRegistry.getRegistry(6666);
            
            System.out.println(registry.list()[0]);
            
            
            
            IOpencms opencms=(IOpencms)registry.lookup("opencms0");
            
            opencms.sayHello();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        
    }
   7,the exception is :

    opencms0
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
 java.io.EOFException
 at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
 at RMIClient.main(RMIClient.java:38)
Caused by: java.io.EOFException
 at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:310)
 at java.io.ObjectInputStream$BlockDataInputStream.readUnsignedShort(ObjectInputStream.java:2712)
 at java.io.ObjectInputStream$BlockDataInputStream.readUTF(ObjectInputStream.java:2768)
 at java.io.ObjectInputStream.readUTF(ObjectInputStream.java:1021)
 at java.rmi.server.RemoteObject.readObject(RemoteObject.java:407)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919)
 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
 ... 2 more


  8,conclusion:
  as you can see,client can find the stub named "opencms0",but when it try to get the stub,exception is thrown,it seems that I can not get the stub from rmi registry who is running inside tomcat.

 9.I need your help,if this problem is solved,then I can use CmsObject inside the implementation class .