Subversion Repositories bacoAlunos

package pt.estgp.es.exemplos.hibernate.services;

import pt.estgp.es.exemplos.hibernate.HibernateUtils;

import pt.estgp.es.exemplos.hibernate.User;

import pt.estgp.es.exemplos.hibernate.UserSession;

import pt.estgp.es.exemplos.hibernate.UserSessionImpl;

import pt.estgp.es.exemplos.hibernate.security.SecurityContextProvider;

import pt.estgp.es.exemplos.hibernate.security.logic.NotAuthenticatedException;

import pt.estgp.es.exemplos.hibernate.security.logic.Transaction;

import javax.servlet.http.HttpServletRequest;

import java.util.List;

import static org.hibernate.criterion.Restrictions.eq;

public class ServicoSessoes {

    /**

     * Regista-se o contexto de segurança no monitor e cria-se uma sessão na base de dados

     * se não existir

     * @param requester

     * @return UserSession registada para o Requester

     */

    @Transaction

    public UserSession registerUserSession(1.5.0/docs/api/java/lang/String.html">String requester) {

        SecurityContextProvider.getInstance().registerSessionContext(requester);

        UserSession session;

        try {

            session = (UserSession) HibernateUtils.getCurrentSession().get(UserSession.class, requester);

            if(session == null)

            {

                session = new UserSessionImpl();

                session.setCookie(requester);

                HibernateUtils.getCurrentSession().save(session);

            }

        }

        catch(1.5.0/docs/api/java/lang/Exception.html">Exception e)

        {

            session = new UserSessionImpl();

            session.setCookie(requester);

            HibernateUtils.getCurrentSession().save(session);

        }

        session = (UserSession) HibernateUtils.narrow(session);

        return session;

    }

    @Transaction

    public UserSession login(1.5.0/docs/api/java/lang/String.html">String username, 1.5.0/docs/api/java/lang/String.html">String password) throws NotAuthenticatedException {

        List<User> users;

        UserSession persistente;

        1.5.0/docs/api/java/lang/String.html">String cookie = SecurityContextProvider.getInstance().getSecuritySessionContext().getRequester();

        persistente = (UserSession) HibernateUtils.getCurrentSession().load(UserSession.class,cookie);

        users = HibernateUtils.getCurrentSession()

                .createCriteria(User.class)

                .add(eq("username", username))

                .add(eq("password", password)).list();

        if (users==null || users.size()==0)

            throw new NotAuthenticatedException("falha de autenticação");

        User u= users.get(0);

        persistente.setUser(u);

        return persistente;

    }

    @Transaction

    public void logout()  {

        List<User> users;

        UserSession persistente;

        1.5.0/docs/api/java/lang/String.html">String cookie = SecurityContextProvider.getInstance().getSecuritySessionContext().getRequester();

        persistente = (UserSession) HibernateUtils.getCurrentSession().load(UserSession.class,cookie);

        persistente.setUser(null);

    }

}