public interface SharedLogin extends Remote {

    public Usuario HasSharedLogin(String username) throws RemoteException;

    public void AddSharedLogin(Usuario user) throws RemoteException;
}

public class SharedLoginImpl implements SharedLogin, Serializable {


    @Override
    public Usuario HasSharedLogin(String username) throws RemoteException {
        return null;
    }

    @Override
    public void AddSharedLogin(Usuario user) throws RemoteException {

    }
}

<bean id="sharedLogin" class="co.teamware.iapg.sipg.web.usuarios.SharedLoginImpl"/>
<bean id="sharedLoginService" class="org.springframework.remoting.rmi.RmiServiceExporter">
        <property name="service" ref="sharedLogin"/>
        <property name="serviceInterface" value="co.teamware.iapg.sipg.web.usuarios.SharedLogin"/>
        <property name="serviceName" value="SharedLoginService"/>
        <property name="replaceExistingBinding" value="true"/>
        <property name="registryPort" value="1099"/>
</bean>