===== Simple Java-RMI example =====

{{tanszek:oktatas:java_rmi.png|}}

1.) Should we define RObject interfaces, both implements Remore interface

  import java.rmi.*;
  
  public interface RObject extends Remote {
    // simple parameters
    void primitiveArg(int num) throws RemoteException;
    
    // parameters by value
    void argumentByValue(Integer num) throws RemoteException;
  }
  

2.) Lets implement the codes of the remote objects

  import java.rmi.RemoteException;
  import java.rmi.server.UnicastRemoteObject;
  
  public class RObjectImpl extends UnicastRemoteObject implements RObject {
        private static final long serialVersionUID = 6350331764929058681L;
        public RObjectImpl() throws RemoteException {
        } 
    
        @Override
        public void primitiveArg(int num) throws RemoteException {
           System.out.println(num);
        }
  
        @Override
        public void argumentByValue(Integer num) throws RemoteException {
           System.out.println(num);
        }
  }  

3.) Lets create an instance of the remote object and launch registry and bind to the registry.

  import java.rmi.Naming;
  
  import org.ait.RObject;
  import org.ait.RObjectImpl;
  
  
  public class RegisterService {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
                          java.rmi.registry.LocateRegistry.createRegistry(1099);
			  RObject robj = new RObjectImpl();
			  Naming.rebind("rmi://localhost:1099/RObjectServer", robj);
                          System.out.println("Registered...");
			} catch (Exception e) {
			  e.printStackTrace();
			}
	}
  }

4.) Use the remote object

  import java.rmi.Naming;
  
  public class Client {
      public static void main(String[] args) {
          try {
              // registry binding 
             RObject robj = (RObject) Naming
                      .lookup("rmi://localhost:1099/RObjectServer");
      
              robj.primitiveArg(2012);
  
              robj.argumentByValue(new Integer(2012));
  
          } catch (Exception e) {
              e.printStackTrace();
          }
      }
  }