Example usage for javax.persistence EntityManager getTransaction

List of usage examples for javax.persistence EntityManager getTransaction

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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:com.edugility.substantia.substance.TestCasePerson.java

@Test
public void testingJPA() throws Exception {
    final EntityManagerFactory emf = Persistence.createEntityManagerFactory("test");
    assertNotNull(emf);//from   ww  w . j a  v a  2s  .c  o m

    final EntityManager em = emf.createEntityManager();
    assertNotNull(em);

    final EntityTransaction et = em.getTransaction();
    assertNotNull(et);
    et.begin();

    final Person p = new Person();
    em.persist(p);
    em.flush();
    assertFalse(p.isTransient());
    assertTrue(p.isVersioned());
    assertEquals(Long.valueOf(1L), p.getId());
    assertEquals(Integer.valueOf(1), p.getVersion());

    et.commit();
    et.begin();

    final Person p2 = em.find(Person.class, 1L, LockModeType.OPTIMISTIC_FORCE_INCREMENT);
    assertNotNull(p2);
    assertFalse(p2.isTransient());
    assertTrue(p2.isVersioned());
    assertEquals(Long.valueOf(1L), p2.getId());
    assertEquals(Integer.valueOf(1), p2.getVersion());

    et.commit();
    et.begin();

    final Person p3 = em.getReference(Person.class, 1L);
    assertNotNull(p3);
    assertFalse(p3.isTransient());
    assertTrue(p3.isVersioned());
    assertEquals(Long.valueOf(1L), p3.getId());
    assertEquals(Integer.valueOf(2), p3.getVersion());

    et.commit();
    et.begin();

    assertTrue(em.contains(p));
    em.remove(p);

    et.commit();

    em.close();

    emf.close();
}

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

@Override
public boolean delete(UserSkill userSkill) {
    EntityManager em = entityManagerFactory.createEntityManager();
    boolean success = true;
    UserSkill managedUserSkill = null;/*w w w .jav a2  s . c o  m*/
    try {
        em.getTransaction().begin();
        managedUserSkill = em.merge(userSkill);
        em.remove(managedUserSkill);
        em.getTransaction().commit();

        success = true;
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
            success = false;
        }
        em.close();
    }

    return success;
}

From source file:facades.PersonFacadeDB.java

@Override
public Person delete(Integer id) throws NotFoundException {
    EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceFileName);
    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();//w w  w.  j a  v a2s . c om

    Person p = em.find(Person.class, id);

    if (p == null) {
        transaction.rollback();
        throw new NotFoundException("No person for the given id");
    } else {
        em.remove(p);
        transaction.commit();
    }

    return p;
}

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

@Override
public boolean create(User user) {
    EntityManager em = entityManagerFactory.createEntityManager();
    boolean success = false;

    try {//  w w  w.  ja  v a  2 s  .co  m
        em.getTransaction().begin();
        em.persist(user);
        em.getTransaction().commit();
        success = true;
    } catch (RuntimeException e) {
        Logger.getLogger(OfferBidRepositoryImplementation.class.getName()).info(e);
        success = false;
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }
        em.close();
    }

    return success;
}

From source file:facades.PersonFacadeDB.java

@Override
public Person addPerson(String json) {
    //make person from Json
    Person p = gson.fromJson(json, Person.class);

    EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceFileName);
    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();//from ww  w.j  ava 2  s. c  o  m

    try {
        em.persist(p);
        transaction.commit();
    } catch (Exception e) {
        transaction.rollback();
    } finally {
        em.close();
    }
    return p;
}

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

@Override
public boolean create(CheckDocument something) {
    EntityManager em = entityManagerFactory.createEntityManager();
    boolean success = false;

    try {/*from   w ww  . j a v a 2 s .  c  om*/
        em.getTransaction().begin();
        em.persist(something);
        em.getTransaction().commit();
        success = true;
    } catch (RuntimeException e) {
        Logger.getLogger(BasicSkillRepositoryImplementation.class.getName()).info(e);
        success = false;
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }
        em.close();
    }

    return success;
}

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

@Override
public boolean nameExistsInDB(String name) {
    EntityManager em = entityManagerFactory.createEntityManager();
    boolean exists = false;

    try {/*from w  w w .j  av  a2  s . c  om*/
        em.getTransaction().begin();

        TypedQuery<User> query = em.createNamedQuery("User.findByLogin", User.class);
        query.setParameter("login", name);

        query.getSingleResult();

        em.getTransaction().commit();
        exists = true;
    } catch (NoResultException ex) {
        Logger.getLogger(OfferBidRepositoryImplementation.class.getName()).info(ex);
        exists = false;
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }
        em.close();
    }

    return exists;
}

From source file:facades.PersonFacadeDB.java

@Override
public String getPerson(Integer id) throws NotFoundException {
    String result = "";
    //get person with this id from DB
    EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceFileName);
    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();/* w  w  w  .  j  ava 2 s  .  c  o  m*/
    try {
        Person p = em.find(Person.class, id);

        result = om.writeValueAsString(p);
        //            Query query = em.createNamedQuery("Person.findById").setParameter("id", id);
        //            List<Person> people = query.getResultList();

        //result = gson.toJson(people.get(0));
        //result = om.writeValueAsString(people.get(0));
    } catch (Exception e) {
        throw new NotFoundException("No person exists for the given id");
    } finally {
        em.close();
    }
    return result;
}

From source file:facades.PersonFacadeDB.java

@Override
public String getPersons() {

    String result = "";
    EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceFileName);
    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();/*from  www.ja v a 2s .  com*/

    try {
        Query query = em.createNamedQuery("Person.findAll");
        List<Person> people = query.getResultList();

        try {
            result = om.writeValueAsString(people);
        } catch (JsonProcessingException ex) {
            Logger.getLogger(PersonFacadeDB.class.getName()).log(Level.SEVERE, null, ex);
        }

    } finally {
        em.close();
    }
    return result;
}

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

@Override
public boolean delete(VacancySkill vacancySkill) {
    EntityManager em = entityManagerFactory.createEntityManager();
    boolean success = true;
    VacancySkill managedVacancySkill = null;
    try {//w w  w . j  ava 2 s  . com
        em.getTransaction().begin();
        managedVacancySkill = em.merge(vacancySkill);
        em.remove(managedVacancySkill);
        em.getTransaction().commit();

        success = true;
    } finally {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
            success = false;
        }
        em.close();
    }

    return success;
}