Examples with UserTransaction javax.transaction.UserTransaction used on opensource projects

Example 81 with UserTransaction

use of javax.transaction.UserTransaction in project microservices by pwillhan.

the class VersioningTimestamp method firstCommitWins.

@Test(expectedExceptions = OptimisticLockException.class)
public void firstCommitWins() throws Throwable {
    UserTransaction tx = TM.getUserTransaction();
    try {
        tx.begin();
        EntityManager em = JPA.createEntityManager();
        Item someItem = new Item();
        someItem.setName("Some Item");
        em.persist(someItem);
        tx.commit();
        em.close();
        final Long ITEM_ID = someItem.getId();
        // Load an item and change its name
        tx.begin();
        em = JPA.createEntityManager();
        Item item = em.find(Item.class, ITEM_ID);
        item.setName("New Name");
        // The concurrent second unit of work doing the same
        Executors.newSingleThreadExecutor().submit(new Callable<Object>() {

            @Override
            public Object call() throws Exception {
                UserTransaction tx = TM.getUserTransaction();
                try {
                    tx.begin();
                    EntityManager em = JPA.createEntityManager();
                    Item item = em.find(Item.class, ITEM_ID);
                    item.setName("Other Name");
                    tx.commit();
                    em.close();
                } catch (Exception ex) {
                    // This shouldn't happen, this commit should win!
                    TM.rollback();
                    throw new RuntimeException("Concurrent operation failure: " + ex, ex);
                }
                return null;
            }
        }).get();
        try {
            tx.commit();
        // Version check: How many rows have been updated?
        } catch (Exception ex) {
            throw unwrapCauseOfType(ex, OptimisticLockException.class);
        }
        em.close();
    } finally {
        TM.rollback();
    }
}

Example 82 with UserTransaction

use of javax.transaction.UserTransaction in project microservices by pwillhan.

the class ExtendedPC method storeItemImagesTestData.

/* ################################################################################### */
public TestData storeItemImagesTestData() throws Exception {
    UserTransaction tx = TM.getUserTransaction();
    tx.begin();
    EntityManager em = JPA.createEntityManager();
    Long[] ids = new Long[1];
    Item item = new Item();
    item.setName("Some Item");
    em.persist(item);
    ids[0] = item.getId();
    for (int i = 1; i <= 3; i++) {
        item.getImages().add(new Image("Image " + i, "image" + i + ".jpg", 640, 480));
    }
    tx.commit();
    em.close();
    return new TestData(ids);
}

Example 83 with UserTransaction

use of javax.transaction.UserTransaction in project microservices by pwillhan.

the class GeneratedProperties method storeLoadLastModified.

@Test(groups = { "H2" })
public void storeLoadLastModified() throws Exception {
    long ITEM_ID = storeItemAndBids();
    UserTransaction tx = TM.getUserTransaction();
    try {
        tx.begin();
        EntityManager em = JPA.createEntityManager();
        Item item = em.find(Item.class, ITEM_ID);
        assertNotNull(item.getCreatedOn());
        Date lastModified = item.getLastModified();
        assertNotNull(lastModified);
        assertTrue(item.getCreatedOn().getTime() < lastModified.getTime());
        item.setDescription("Some modification.");
        em.flush();
        Date newLastModified = item.getLastModified();
        assertNotEquals(lastModified, newLastModified, "Modification time should have been updated");
        tx.commit();
        em.close();
    } finally {
        TM.rollback();
    }
}

Example 84 with UserTransaction

use of javax.transaction.UserTransaction in project microservices by pwillhan.

the class LazyProperties method storeLoadLocator.

@Test
public void storeLoadLocator() throws Exception {
    // TODO: This test fails on H2 standalone
    // http://groups.google.com/group/h2-database/browse_thread/thread/9c6f4893a62c9b1a
    UserTransaction tx = TM.getUserTransaction();
    try {
        tx.begin();
        EntityManager em = JPA.createEntityManager();
        byte[] bytes = new byte[131072];
        new Random().nextBytes(bytes);
        InputStream imageInputStream = new ByteArrayInputStream(bytes);
        int byteLength = bytes.length;
        Item someItem = new Item();
        someItem.setName("Some item");
        someItem.setDescription("This is some description.");
        // Need the native Hibernate API
        Session session = em.unwrap(Session.class);
        // You need to know the number of bytes you want to read from the stream!
        Blob blob = session.getLobHelper().createBlob(imageInputStream, byteLength);
        someItem.setImageBlob(blob);
        em.persist(someItem);
        tx.commit();
        em.close();
        Long ITEM_ID = someItem.getId();
        tx.begin();
        em = JPA.createEntityManager();
        Item item = em.find(Item.class, ITEM_ID);
        // You can stream the bytes directly...
        InputStream imageDataStream = item.getImageBlob().getBinaryStream();
        // ... or materialize them into memory:
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        StreamUtils.copy(imageDataStream, outStream);
        byte[] imageBytes = outStream.toByteArray();
        assertEquals(imageBytes.length, 131072);
        tx.commit();
        em.close();
    } finally {
        TM.rollback();
    }
}

Example 85 with UserTransaction

use of javax.transaction.UserTransaction in project microservices by pwillhan.

the class LazyProperties method storeLoadProperties.

@Test
public void storeLoadProperties() throws Exception {
    UserTransaction tx = TM.getUserTransaction();
    try {
        tx.begin();
        EntityManager em = JPA.createEntityManager();
        Item someItem = new Item();
        someItem.setName("Some item");
        someItem.setDescription("This is some description.");
        byte[] bytes = new byte[131072];
        new Random().nextBytes(bytes);
        someItem.setImage(bytes);
        em.persist(someItem);
        tx.commit();
        em.close();
        Long ITEM_ID = someItem.getId();
        tx.begin();
        em = JPA.createEntityManager();
        Item item = em.find(Item.class, ITEM_ID);
        // Accessing one initializes ALL lazy properties in a single SELECT
        assertEquals(item.getDescription(), "This is some description.");
        // 128 kilobytes
        assertEquals(item.getImage().length, 131072);
        tx.commit();
        em.close();
    } finally {
        TM.rollback();
    }
}