@Stateless
public class MyBEAN implements MyBeanInterface {
    @PersistenceContext(unitName = "myUnit")
    private EntityManager entityManager;
...

@WebServlet(name = "S", urlPatterns = "/s")
public class S extends HttpServlet {
    @Inject
    private MyBeanInterface mbi;
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("Amount datas>>>>>"+mbi.findLast24H().size());
    }

public class StChart {
    @Inject
    private MyBeanInterface mbi;

    public void sendChartWithStart() {
        System.out.println("MyBeanInterface StChart>> " + mbi);
    }

InitialContext ctx = new InitialContext();
MyBEAN mbi = (MyBEAN) ctx.lookup("myBean");

@EJB(beanName = "MyBEAN")

InitialContext ctx = new InitialContext();
        MyBeanInterface mbi = (MyBeanInterface) ctx.lookup("java:module/myBean");