Activation: Compiling setup

Question

Hi,
I am trying to compile set up , I am getting following errors:
Djava.rmi.server.codebase=file:\\D:\javaprogs\misc\rmi\Activation\NoInit\ Reg
er
Exception in thread "main" java.rmi.StubNotFoundException: unable to load cla
whitney.rmi.examples.activation.HelloServer; nested exception is:
java.lang.ClassNotFoundException: whitney.rmi.examples.activation.Hel
erver
at sun.rmi.server.ActivatableRef.getStub(Unknown Source)
at java.rmi.activation.Activatable.register(Unknown Source)
at Register.main(Register.java:25)
Caused by: java.lang.ClassNotFoundException: whitney.rmi.examples.activation.
loServer
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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 sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
... 3 more
My setup code is:
import java.rmi.activation.*;
import java.util.Properties;
public class Register{
public static void main(String[] args) throws Exception  {
      System.setSecurityManager(new RMISecurityManager());
      Properties policyFileLocation = new Properties();
      policyFileLocation.put("java.security.policy","policy.txt");
      ActivationGroupDesc.CommandEnvironment ace = null;
      ActivationGroupDesc exampleGroup =
         new ActivationGroupDesc(policyFileLocation, ace);
     ActivationSystem localActivationSystem = ActivationGroup.getSystem();
      ActivationGroupID agi =
         localActivationSystem.registerGroup(exampleGroup);
      ActivationGroup.createGroup(agi, exampleGroup, 0);
      String classLocation = "file:\\D:\\javaprogs\\misc\\rmi\\Activation\\NoInit\\";
      String serverClass = "HelloServer";
      MarshalledObject data = null;
      ActivationDesc desc =
         new ActivationDesc(serverClass, classLocation, data);
      Hello mri = (Hello)Activatable.register(desc);
      System.out.println("Got the stub for the HelloServer");
      Naming.rebind("Hello", mri);
      System.out.println("Exported HelloServer");
      System.exit(0);
   }I am using the following command:
D:\javaprogs\misc\rmi\Activation\NoInit>java -Djava.security.policy=policy.txt -
Djava.rmi.server.codebase=file:\\D:\javaprogs\misc\rmi\Activation\NoInit\ Regist
er
I dont know how to specify codebase? Can somebody help me?
Zulfi.

Answer 1

I am NO expert with RMI, but I recognise a few things that are wrong:
1) You need a semi-colon at EOL:
String classLocation = "file:\\D:\\javaprogs\\misc\\rmi\\Activation\\NoInit\\"
2) You do not want two '\\' after file in your command, see '3', below.
3) You will probably need to add a security policy to the line; like:
Djava.rmi.server.codebase=file:\\D:\javaprogs\misc\rmi\Activation\NoInit\ -Djava.security.policy=java.policy Register URL
... Where URL is your URL