com.apuntesdejava.rest.seguridad.CalculadoraService

package com.apuntesdejava.rest.seguridad;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.security.DeclareRoles;
import javax.annotation.security.RolesAllowed;
import javax.ejb.Stateless;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.QueryParam;

@Stateless
@Path("/calculadora")
@DeclareRoles({"USER","ADMIN"})
public class CalculadoraService {

    static final Logger LOGGER = Logger.getLogger(CalculadoraService.class.getName());

    @GET
    @RolesAllowed("USER")
    @Path("/factorial")
    public String factorial(@QueryParam("base") long base) {
        LOGGER.log(Level.INFO, "Realizando factorial({0})", base);
        return String.valueOf(_factorial(base));
    }

    private long _factorial(long base) {
        LOGGER.log(Level.FINE, "factorial({0})", base);
        if (base > 1) {
            return base * _factorial(base - 1);
        }
        return 1;
    }
}