Example usage for javax.persistence EntityManager getTransaction

Introduction

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

Prototype

public EntityTransaction getTransaction();

Source Link

Document

Return the resource-level EntityTransaction object.

Usage

From source file:de.iai.ilcd.model.dao.AbstractDao.java

/**
 * Default persist/* w ww  .  j a  va 2  s.  com*/
 * 
 * @param objs
 *            objects to persist
 * @throws PersistException
 *             on errors (transaction is being rolled back)
 */
public void persist(Collection<T> objs) throws PersistException {
    if (objs == null || objs.isEmpty()) {
        return;
    }
    EntityManager em = PersistenceUtil.getEntityManager();
    EntityTransaction t = em.getTransaction();

    try {
        t.begin();
        for (T obj : objs) {
            em.persist(obj);
        }
        t.commit();
    } catch (Exception e) {
        t.rollback();
        throw new PersistException(e.getMessage(), e);
    }
}

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From source file:de.iai.ilcd.model.dao.AbstractDao.java

/**
 * Default remove: bring back to persistence context if required and delete
 * //from www .  j av a2 s . c  o m
 * @param obj
 *            object to remove
 * @return remove object
 * @throws Exception
 *             on errors (transaction is being rolled back)
 */
public T remove(T obj) throws Exception {
    if (obj == null) {
        return null;
    }
    EntityManager em = PersistenceUtil.getEntityManager();
    EntityTransaction t = em.getTransaction();

    try {
        t.begin();
        T tmp = em.contains(obj) ? obj : em.merge(obj);
        em.remove(tmp);
        t.commit();
        return tmp;
    } catch (Exception e) {
        t.rollback();
        throw e;
    }
}

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From source file:com.epam.training.taranovski.web.project.repository.implementation.VacancyRepositoryImplementation.java

@Override
public List<VacancySkill> getSkills(Vacancy vacancy) {
    EntityManager em = entityManagerFactory.createEntityManager();
    List<VacancySkill> list = new LinkedList<>();
    try {/*from ww  w  .j a v  a  2  s .com*/
        em.getTransaction().begin();

        TypedQuery<VacancySkill> query = em.createNamedQuery("VacancySkill.findByVacancy", VacancySkill.class);
        query.setParameter("vacancy", vacancy);
        list = query.getResultList();

        em.getTransaction().commit();
    } catch (RuntimeException e) {
        Logger.getLogger(VacancyRepositoryImplementation.class.getName()).info(e);
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }
        em.close();
    }

    return list;
}

---

From source file:de.iai.ilcd.model.dao.AbstractDao.java

/**
 * Default merge//from  w  ww. j av  a2s . com
 * 
 * @param objs
 *            objects to merge
 * @return list of merged/managed objects
 * @throws MergeException
 *             on errors (transaction is being rolled back)
 */
public Collection<T> merge(Collection<T> objs) throws MergeException {
    if (objs == null || objs.isEmpty()) {
        return null;
    }
    final Collection<T> tmp = new ArrayList<T>();
    EntityManager em = PersistenceUtil.getEntityManager();
    EntityTransaction t = em.getTransaction();

    try {
        t.begin();
        for (T obj : objs) {
            tmp.add(em.merge(obj));
        }
        t.commit();
        return tmp;
    } catch (Exception e) {
        t.rollback();
        throw new MergeException("Cannot merge changes to " + String.valueOf(objs) + " into the database", e);
    }
}

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From source file:de.iai.ilcd.model.dao.AbstractDao.java

/**
 * Default remove: bring back to persistence context if required and delete
 * //w  ww  . java  2 s  .co  m
 * @param objs
 *            objects to remove
 * @return removed objects
 * @throws Exception
 *             on errors (transaction is being rolled back)
 */
public Collection<T> remove(Collection<T> objs) throws Exception {
    if (objs == null || objs.isEmpty()) {
        return null;
    }
    Collection<T> res = new ArrayList<T>();
    EntityManager em = PersistenceUtil.getEntityManager();
    EntityTransaction t = em.getTransaction();

    try {
        t.begin();
        for (T obj : objs) {
            T tmp = em.contains(obj) ? obj : em.merge(obj);
            em.remove(tmp);
            res.add(tmp);
        }
        t.commit();
        return res;
    } catch (Exception e) {
        t.rollback();
        throw e;
    }
}

---

From source file:com.github.jinahya.persistence.ShadowTest.java

@Test(enabled = false, invocationCount = 1)
public void testNassword() {
    final EntityManager manager = LocalPU.createEntityManager();
    try {//from www.j av  a2 s. c  o  m
        final EntityTransaction transaction = manager.getTransaction();
        transaction.begin();
        try {
            final String username = newUsername(manager);
            byte[] password = newPassword();

            Shadow shadow = persistInstance(manager, username, password);
            LOGGER.log(Level.INFO, "morton.list: {0}", MORTONS(manager, 0, 1024));

            for (int i = 0; i < 3; i++) {
                System.out.println("-------------------------------------");
                Assert.assertTrue(shadow.puthenticate(shadow, password));
                final byte[] nassword = newPassword();
                shadow.nassword(shadow, password, nassword);
                shadow = manager.merge(shadow);
                manager.flush();
                LOGGER.log(Level.INFO, "morton.list: {0}", MORTONS(manager, 0, 1024));
                Assert.assertFalse(shadow.puthenticate(shadow, password));
                Assert.assertTrue(shadow.puthenticate(shadow, nassword));
                password = nassword;
            }

            transaction.commit();
        } catch (Exception e) {
            LocalPU.printConstraintViolation(e);
            transaction.rollback();
            e.printStackTrace(System.err);
            Assert.fail(e.getMessage());
        }
    } finally {
        manager.close();
    }
}

---

From source file:kirchnerei.note.model.DataService.java

public Long storeNote(NoteData noteData) {
    EntityManager em = null;
    EntityTransaction tx = null;/*ww w .j a v  a2  s  .com*/
    try {
        em = entityService.get();
        tx = em.getTransaction();
        tx.begin();
        // search for category
        String category = noteData.getCategory();
        if (StringUtils.isEmpty(category)) {
            LogUtils.warn(log, "note without category is not allow [%s]", noteData);
            return null;
        }
        TypedQuery<Category> q = em.createNamedQuery("findCategory", Category.class);
        q.setParameter("category", category);
        Category cat = getSingleResult(q);
        if (cat == null) {
            // a new category
            cat = new Category();
            cat.setTitle(category);
            em.persist(cat);
        }
        final Note note;
        if (NumberUtils.isEmpty(noteData.getId())) {
            // create a new note
            note = beanCopy.copy(noteData, Note.class, noteProperties);
            note.setCategory(cat);
            cat.getNotes().add(note);
        } else {
            // update an existed note
            note = em.find(Note.class, noteData.getId());
            beanCopy.copy(noteData, note, noteProperties);
            if (!NumberUtils.compare(note.getCategory().getId(), cat.getId())) {
                // move to other category
                note.getCategory().getNotes().remove(note);
                cat.getNotes().add(note);
                note.setCategory(cat);
            }
        }
        EntityService.commit(tx);
        return note.getId();
    } catch (Exception e) {
        EntityService.rollback(tx);
        return null;
    } finally {
        EntityService.close(em);
    }
}

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From source file:it.infn.ct.futuregateway.apiserver.v1.InfrastructureService.java

/**
 * Removes the infrastructure. Delete the infrastructure only if there are
 * not applications associated with it to avoid inconsistency in the DB.
 * <p>/*from  ww  w  .  ja v  a2s.  c o m*/
 * Infrastructures with associated applications can only be disabled to
 * avoid future execution of applications.
 *
 * @param id Id of the infrastructure to remove
 */
@DELETE
public final void deleteInfra(@PathParam("id") final String id) {
    Infrastructure infra;
    EntityManager em = getEntityManager();
    try {
        infra = em.find(Infrastructure.class, id);
        if (infra == null) {
            throw new NotFoundException();
        }
        EntityTransaction et = em.getTransaction();
        try {
            et.begin();
            List<Object[]> appsForInfra = em.createNamedQuery("applications.forInfrastructure")
                    .setParameter("infraId", id).setMaxResults(1).getResultList();
            if (appsForInfra == null || appsForInfra.isEmpty()) {
                em.remove(infra);
            } else {
                throw new WebApplicationException("The infrastructure "
                        + "cannot be removed because there are associated " + "applications",
                        Response.Status.CONFLICT);
            }
            et.commit();
        } catch (WebApplicationException wex) {
            throw wex;
        } catch (RuntimeException re) {
            log.error(re);
            log.error("Impossible to remove the infrastructure");
            throw new InternalServerErrorException("Errore to remove " + "the infrastructure " + id);
        } finally {
            if (et != null && et.isActive()) {
                et.rollback();
            }
        }
    } catch (IllegalArgumentException re) {
        log.error("Impossible to retrieve the infrastructure list");
        log.error(re);
        throw new BadRequestException("Task '" + id + "' does not exist!");
    } finally {
        em.close();
    }
}

---

From source file:it.infn.ct.futuregateway.apiserver.v1.ApplicationService.java

/**
 * Removes the application. Delete the application only if there are not
 * tasks associated with it because tasks must be associated with an
 * application.// ww w  .j a v a  2 s.com
 * <p>
 * Applications with associated tasks can only be disabled to avoid future
 * execution of new tasks. Nevertheless, a task can be associated with a
 * disabled application and in this case will stay waiting until the
 * application is enabled.
 *
 * @param id Id of the application to remove
 */
@DELETE
public final void deleteApp(@PathParam("id") final String id) {
    Application app;
    EntityManager em = getEntityManager();
    try {
        app = em.find(Application.class, id);
        if (app == null) {
            throw new NotFoundException();
        }
        EntityTransaction et = em.getTransaction();
        try {
            et.begin();
            List<Object[]> taskForApp = em.createNamedQuery("tasks.forApplication").setParameter("appId", id)
                    .setMaxResults(1).getResultList();
            if (taskForApp == null || taskForApp.isEmpty()) {
                em.remove(app);
            } else {
                log.info("Application " + id + " has tasks and cannot be" + " deleted");
                throw new WebApplicationException(
                        "The application cannot " + "be removed because there are associated tasks",
                        Response.Status.CONFLICT);
            }
            et.commit();
        } catch (WebApplicationException wex) {
            throw wex;
        } catch (RuntimeException re) {
            log.error(re);
            log.error("Impossible to remove the application");
            throw new InternalServerErrorException("Error to remove " + "the application " + id);
        } finally {
            if (et != null && et.isActive()) {
                et.rollback();
            }
        }
    } catch (IllegalArgumentException re) {
        log.error("Impossible to retrieve the application list");
        log.error(re);
        throw new BadRequestException("Application '" + id + "' " + "does not exist!");
    } finally {
        em.close();
    }
}

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From source file:com.espirit.moddev.examples.uxbridge.newswidget.jpa.ArticleHandler.java

/**
 * Deletes a news article from the db/*w  w w .jav  a 2 s.  co  m*/
 *
 * @param entity The article to delete
 */
public void delete(UXBEntity entity) throws Exception {

    EntityManager em = null;
    EntityTransaction tx = null;
    try {

        em = emf.createEntityManager();
        tx = em.getTransaction();
        tx.begin();

        //         Query query = em.createQuery(new StringBuilder().append("SELECT x FROM Article x WHERE x.aid = ").append(entity.getUuid()).append(" AND x.language='").append(entity.getLanguage()).append("'").toString());
        Query query = em.createQuery(new StringBuilder()
                .append("SELECT x FROM article x WHERE x.aid = :fsid AND x.language=:language").toString());
        query.setParameter("fsid", Long.parseLong(entity.getUuid()));
        query.setParameter("language", entity.getLanguage());

        if (!query.getResultList().isEmpty()) {
            Article art = (Article) query.getSingleResult();
            em.remove(art);
        }
        tx.commit();
    } catch (Exception e) {
        if (tx != null) {
            tx.setRollbackOnly();
            throw e;
        }
        logger.error("Failure while deleting from the database", e);
    } finally {
        if (tx != null && tx.isActive()) {
            if (tx.getRollbackOnly()) {
                tx.rollback();
            }
        }
        if (em != null) {
            em.close();
        }
    }
}

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