Check out some similar questions!

javalola · Jul 17, 2012, 10:34 AM

Hi, I am a beginner in java. I am trying to create a rmi client- database server application in java, but I am struggling. The client and the database server are to work well even if placed in different computers, that is in separate packages.
My server seems to be working fine, but when I run my client I keep on getting the error: java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:1099" "connect,resolve").

I read on security policies recently and I don't really know how to work with it in netbeans. I read that I am to create a security policy file and place it in the server package and client package too. I did so, I created a txt file with my policy and placed a copy of it in my netbeans projects, inside the server and client src file and in the package respectively. My policy looks as follows:

Code:

grant {
  permission java.security.AllPermission;
};

My server looks as follows:

Code:

package wildanimalsserver;
import java.rmi.RMISecurityManager;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
/**
 *
 * @author CTI
 */
public class WildAnimalsServer {
 
    public WildAnimalsServer() {
    }
    public static void main(String [] args) {
        try {
            RMISecurityManager security = new RMISecurityManager();
            System.setSecurityManager(new RMISecurityManager());
            //Creating and getting the reference to the RMI registry
            Registry registry = LocateRegistry.createRegistry(1099);
             
            //Instantiating the object
            AnimalObject ao = new AnimalObject();
            //Registering the object
            registry.rebind("Animal", ao);
            System.out.println("Server ready...");
        } catch (Exception e) {
            System.out.println(e);
        }
    }
     
}

.. and my client:

Code:

package wildanimalsclient;
import java.rmi.RMISecurityManager;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
/**
 *
 * @author CTI
 */
public class WildAnimalsClient {
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
    try {
            RMISecurityManager security = new RMISecurityManager();
            System.setSecurityManager(new RMISecurityManager());
            // Get reference to rmi registry server
            Registry registry = LocateRegistry.getRegistry(1099);
            // Looking up for the server object
            IRemoteAnimal ra = (IRemoteAnimal)registry.lookup("Animal");
            System.out.println("Client ready and responding...");
 
        } catch (Exception e) {
            System.out.println(e);
        }       
    }
}

My Server consists of:
Animal.java(entity class mapping to database)
IRemoteanimal.java(RMI application interface)
AnimalObject.java(Animal object to be distributed)
WildAnimalsServer.java(server application)
WildAnimalsDBmanager.java(manage connection to database)
AnimalRepository.java(provides crud operations)

And my client:
Animal.java(same as server)
IRemoteanimal.java(same as server)
WildAnimalsClient.java(client application calling RMI server)

Marconian · Aug 27, 2012, 03:42 PM

Could you find the answer to your problem? I'm beginning to work with RMI and I'm facing the same problem: java.net.SocketPermission

Let me know if you find any solution.

Thanks,

Marcos Alves
[email protected]