ipapaste

public interface RPCServiceAsync {
	public void getCars(String city, AsyncCallback<List<Car>> callback);
}

ipapaste

public interface RPCService extends RemoteService {
	public List<Car> getCars(String city);
}

ipapaste

public class RPCServiceImpl extends RemoteServiceServlet implements RPCService {
	public List<Car> getCars(String city) {
		// Implementation here
	}
}