import java.rmi.*;
public interface Serverinterface extends Remote {
	// the server puts the remote methods into the interface for the clients to invoke
	
     public void update(String m) throws java.rmi.RemoteException;
	  public void addCallback(Callbackinterface CallbackObject)
	    throws java.rmi.RemoteException;
	  //the method is used to record the clients.
	

	}