Example usage for javax.persistence EntityManager clear

Introduction

In this page you can find the example usage for javax.persistence EntityManager clear.

Prototype

public void clear();

Source Link

Document

Clear the persistence context, causing all managed entities to become detached.

Usage

From source file:ejb.bean.UsuarioDAOJPAImplBean.java

/**Mtodo para a remoo de usurio.
 * @author Richel Sensineli// w  w  w.  jav  a2 s . co m
 * @param id int - ID do usurio
 * @throws UsuarioNaoEncontradoException - usurio no encontrado
 */
@Override
public void removeUsuario(final int id) throws UsuarioNaoEncontradoException {
    EntityManagerFactory emf = Persistence.createEntityManagerFactory("UsuarioPU");
    EntityManager em = emf.createEntityManager();

    Usuario u = em.find(UsuarioImpl.class, id);

    em.getTransaction().begin();
    if (u == null) {
        throw new UsuarioNaoEncontradoException("usuario no encontrado");
    } else {
        em.remove(u);
        em.getTransaction().commit();
    }
    em.clear();
    em.close();
    emf.close();

}

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From source file:ejb.bean.UsuarioDAOJPAImplBean.java

/**Mtodo para a criao de usurio
 * @author Richel Sensineli\/*from ww  w.  j  a v  a  2 s. com*/
 * @param nome String - Nome do usurio
 * @param sobrenome String - Nome do usurio
 * @return Usuario usuario - Objeto Usurio
 */
@Override
public Usuario criaUsuario(final String nome, final String sobrenome) {
    EntityManagerFactory emf = Persistence.createEntityManagerFactory("UsuarioPU");
    EntityManager em = emf.createEntityManager();

    UsuarioImpl user = new UsuarioImpl();
    user.setNome(nome);
    user.setSobrenome(sobrenome);

    em.getTransaction().begin();
    try {
        em.persist(user);
        em.getTransaction().commit();
    } catch (Exception e) {
        e.printStackTrace();
        em.getTransaction().rollback();
    }

    em.clear();
    em.close();
    emf.close();

    return user;
}

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From source file:ejb.bean.UsuarioDAOJPAImplBean.java

/**Mtodo para a atualizao do usurio
 * @author Richel Sensineli/* w w w. j a  va 2 s  .  c o m*/
 * @param id int - ID do usurio
 * @param nome String - Nome do usurio
 * @param sobrenome String - Nome do usurio
 */
@Override
public void updateUsuario(final int id, final String nome, final String sobrenome)
        throws UsuarioNaoEncontradoException {
    EntityManagerFactory emf = Persistence.createEntityManagerFactory("UsuarioPU");
    EntityManager em = emf.createEntityManager();

    UsuarioImpl user = em.find(UsuarioImpl.class, id);
    user.setNome(nome);
    user.setSobrenome(sobrenome);

    em.getTransaction().begin();
    try {
        em.merge(user);
        em.getTransaction().commit();
    } catch (Exception e) {
        e.printStackTrace();
        em.getTransaction().rollback();
    }

    em.clear();
    em.close();
    emf.close();
}

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From source file:in.bookmylab.jpa.JpaDAO.java

public List<StaticData> getStaticData() {
    EntityManager em = emf.createEntityManager();
    List<StaticData> data = null;
    try {//from   w  ww .ja v a2 s.  c o m
        data = em.createNamedQuery("StaticData.findAll", StaticData.class).getResultList();
    } finally {
        em.clear();
        em.close();
    }
    return data;
}

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From source file:in.bookmylab.jpa.JpaDAO.java

public List<ResourceBooking> getSlotsByDate(Date dt) {
    List<ResourceBooking> list = null;
    EntityManager em = emf.createEntityManager();
    try {//from   w w  w .j a  v  a  2s.  c  o  m
        Query q = em.createNamedQuery("ResourceBooking.findSlotsByDate");
        list = q.setParameter("bookingDate", dt).getResultList();
    } finally {
        em.clear();
        em.close();
    }
    return list;
}

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From source file:org.drools.semantics.lang.dl.DL_9_CompilationTest.java

private void persist(Object o, EntityManager em) {
    em.getTransaction().begin();
    em.persist(o);
    em.getTransaction().commit();
    em.clear();
}

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From source file:in.bookmylab.jpa.JpaDAO.java

public User getUserByLogin(String email) {
    User u = null;/*www . java 2s  .c om*/
    EntityManager em = emf.createEntityManager();
    try {
        Query q = em.createNamedQuery("User.findByEmail");
        List<User> l = q.setParameter("email", email).getResultList();
        if (l.size() == 1) {
            u = l.get(0);
        }
    } finally {
        em.clear();
        em.close();
    }
    return u;
}

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From source file:org.SRV.testServlet.java

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    double value1 = Double.parseDouble(request.getParameter("val1"));
    double value2 = Double.parseDouble(request.getParameter("val2"));

    UserDetails user = (UserDetails) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    String username = user.getUsername();
    //com.seostella_springsecuritybasics_war_1.0.0-BUILD-SNAPSHOTPU
    entityManagerFactory = Persistence.createEntityManagerFactory("org.SRV_war_1.0.0-BUILD-SNAPSHOTPU");

    double result = 0;
    switch (request.getParameter("operation").charAt(0)) {
    case '+':
        result = value1 + value2;/*from  ww  w  . j a va 2  s . c o m*/
        break;
    case '-':
        result = value1 - value2;
        break;
    case '*':
        result = value1 * value2;
        break;
    case '/':
        result = value1 / value2;
        break;
    default:
        break;
    }

    EntityManager entityManager = entityManagerFactory.createEntityManager();
    entityManager.getTransaction().begin();
    Date date = new Date();
    Essence essence = new Essence();
    essence.setLogin(username);
    essence.setDate(date);
    essence.setValue1(Double.toString(value1));
    essence.setValue2(Double.toString(value2));
    essence.setOperation(request.getParameter("operation"));
    essence.setResult(Double.toString(result));
    entityManager.persist(essence);
    entityManager.getTransaction().commit();
    entityManager.clear();
    entityManager.close();
    entityManagerFactory.close();
    JSONObject obj;
    obj = new JSONObject();
    obj.put("result", result);
    //response.getOutputStream().print(obj.toString());
    response.getWriter().write(obj.toString());
}

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From source file:org.eclipse.jubula.client.core.persistence.ProjectPM.java

/**
 * Load an instance of ProjectPO into the readonly session. The read
 * instance is db identical to the key supplied.
 * used for open project/*from   w  w  w .  j av  a  2s  .c  om*/
 * 
 * @param project
 *            Look for this instance in the db.
 * @throws PMReadException
 *             if loading from db failed
 * 
 */
public static void loadProjectInROSession(IProjectPO project) throws PMReadException {

    GeneralStorage.getInstance().reset();
    EntityManager s = GeneralStorage.getInstance().getMasterSession();
    s.clear(); // get rid of all session (cached) data
    try {
        preloadData(s, project);

        IProjectPO p = s.find(NodeMaker.getProjectPOClass(), project.getId());
        GeneralStorage.getInstance().setProject(p);
        ParamNameBP.getInstance().initMap();
        ComponentNamesBP.getInstance().init();
    } catch (PersistenceException e) {
        GeneralStorage.getInstance().setProject(null);
        OperationCanceledException cancel = checkForCancel(e);
        if (cancel != null) {
            throw cancel;
        }
        String msg = Messages.CantReadProjectFromDatabase + StringConstants.DOT;
        log.error(Messages.UnexpectedPersistenceErrorIgnored + StringConstants.DOT, e);
        throw new PMReadException(msg + e.getMessage(), MessageIDs.E_CANT_READ_PROJECT);
    } catch (PMException e) {
        String msg = Messages.CouldNotReadParamNamesFromDB + StringConstants.DOT;
        log.error(msg, e);
        throw new PMReadException(msg + e.getMessage(), MessageIDs.E_CANT_READ_PROJECT);
    } catch (JBException e) {
        GeneralStorage.getInstance().setProject(null);
        String msg = Messages.CantReadProjectFromDatabase + StringConstants.DOT;
        log.error(Messages.UnexpectedPersistenceErrorIgnored, e);
        throw new PMReadException(msg + e.getMessage(), MessageIDs.E_CANT_READ_PROJECT);
    }
}

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From source file:org.emau.icmvc.ganimed.epix.core.internal.PersonPreprocessedCache.java

/**
 * Initialize cache//from  ww w  . j  a v  a  2s  .com
 *
 * @param em
 * @param matchingConfiguration
 */
public void init(EntityManager em, MatchingConfiguration matchingConfiguration) {
    synchronized (emSynchronizerDummy) {
        personPreprocessedPreprocessor = new CommonPreprocessor<T>();
        personPreprocessedPreprocessor.setMatchingConfiguration(matchingConfiguration);

        List<PersonPreprocessed> personPreprocessedList = getAllPersonPreprocessed(em);
        for (PersonPreprocessed personPreprocessed : personPreprocessedList) {
            ppCache.put(personPreprocessed.getPersonId(), personPreprocessed);
        }
        logger.info("ppCache initialized with: " + ppCache.size() + " entries");
        em.clear();
        initialised = true;
    }
}

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