Examples of javax.persistence.EntityManager.clear()

javax.persistence.EntityManager.clear()
Clear the persistence context, causing all managed entities to become detached. Changes made to entities that have not been flushed to the database will not be persisted. @throws IllegalStateException if this EntityManager has been closed

    video.setDirector( "Wes Craven" );
    video.setName( "Scream" );
    em.persist( video );
    getTransactionManager().commit();


    em.clear();


    getTransactionManager().begin();
    music = em.find( Music.class, music.getId() );
    assertThat( music ).isNotNull();
    assertThat( music.getName() ).isEqualTo( "Variations Sur Marilou" );

View Full Code Here

        List<Department> ds =
            em.createQuery(
                "SELECT DISTINCT d FROM Department d LEFT JOIN FETCH d.employees " + "LEFT JOIN FETCH d.employee2s "
                    + "WHERE d.deptno = 10").getResultList();
        System.out.println("-- testJPQLTwoFetch -----");
        em.clear();
        Assert.assertEquals(1, ds.size());
        for (Department x : ds) {
            Assert.assertNotNull(x.getEmployees());
            Assert.assertEquals(2, x.getEmployees().size());
            Assert.assertNotNull(x.getEmployee2s());

View Full Code Here

        Root<Department> d = q.from(Department.class);
        q.where(cb.equal(d.get(Department_.deptno), 20)).select(d);


        List<Department> ds = em.createQuery(q).getResultList();
        System.out.println("-- testCriteriaAPINoFetch -----");
        em.clear();
        Assert.assertEquals(1, ds.size());
        for (Department x : ds) {
            Assert.assertNull(x.getEmployees());
            Assert.assertNull(x.getEmployee2s());
            System.out.println(x);

View Full Code Here

        d.fetch(Department_.employees, JoinType.LEFT);
        q.where(cb.equal(d.get(Department_.deptno), 20)).select(d).distinct(true);


        List<Department> ds = em.createQuery(q).getResultList();
        System.out.println("-- testCriteriaAPIOneFetch -----");
        em.clear();
        Assert.assertEquals(1, ds.size());
        for (Department x : ds) {
            Assert.assertNotNull(x.getEmployees());
            Assert.assertEquals(2, x.getEmployees().size());
            Assert.assertNull(x.getEmployee2s());

View Full Code Here

        d.fetch(Department_.employee2s, JoinType.LEFT);
        q.where(cb.equal(d.get(Department_.deptno), 20)).select(d).distinct(true);


        List<Department> ds = em.createQuery(q).getResultList();
        System.out.println("-- testCriteriaAPITwoFetch -----");
        em.clear();
        Assert.assertEquals(1, ds.size());
        for (Department x : ds) {
            Assert.assertNotNull(x.getEmployees());
            Assert.assertEquals(2, x.getEmployees().size());
            Assert.assertNotNull(x.getEmployee2s());

View Full Code Here

            t.setSomeInt(t.getSomeInt() + 1);
            t = em.merge(t);


            tx.commit();
            // If this clear is removed the test works fine.
            em.clear();


            // Lets say at this point the 'in-memory' timestamp is: 2014-01-22 07:22:11.548778567.  What we 
            // actually sent to the DB (via the previous merge) is by default rounded (see DBDictionary.setTimestamp) 
            // to the nearest millisecond on Oracle (see DBDictionary.datePrecision) and nearest microsecond on 
            // DB2 (see DB2Dictionary.datePrecision) when sending the value to the db.

View Full Code Here


    Employee employee = new Employee( "Alex", "EMPLOYER" );
    em.persist( employee );
    tm.commit();


    em.clear();


    tm.begin();
    CommunityMember lh = em.find( CommunityMember.class, member.name );
    assertThat( lh ).isNotNull();
    assertThat( lh ).isInstanceOf( CommunityMember.class );

View Full Code Here

    EntityManager em = getPersistenceContext(false);
    try {
      return em.contains(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public Query createNamedQuery(String arg0)
  {

View Full Code Here

    EntityManager em = getPersistenceContext(false);
    try {
      return em.createNamedQuery(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public Query createNativeQuery(String arg0)
  {

View Full Code Here

    EntityManager em = getPersistenceContext(false);
    try {
      return em.createNativeQuery(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  @SuppressWarnings("unchecked")
  public Query createNativeQuery(String arg0, Class arg1)

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.