Examples with Item org.jpwh.model.advanced.Item used on opensource projects

Example 1 with Item

use of org.jpwh.model.advanced.Item 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 2 with Item

use of org.jpwh.model.advanced.Item 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 3 with Item

use of org.jpwh.model.advanced.Item 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();
    }
}

Example 4 with Item

use of org.jpwh.model.advanced.Item in project microservices by pwillhan.

the class MappedSubselect method storeItemAndBids.

public Long storeItemAndBids() throws Exception {
    UserTransaction tx = TM.getUserTransaction();
    tx.begin();
    EntityManager em = JPA.createEntityManager();
    Item item = new Item();
    item.setName("Some item");
    item.setDescription("This is some description.");
    em.persist(item);
    for (int i = 1; i <= 3; i++) {
        Bid bid = new Bid();
        bid.setAmount(new BigDecimal(10 + i));
        bid.setItem(item);
        em.persist(bid);
    }
    tx.commit();
    em.close();
    return item.getId();
}

Example 5 with Item

use of org.jpwh.model.advanced.Item in project microservices by pwillhan.

the class MappedSubselect method loadSubselectEntity.

@Test
public void loadSubselectEntity() throws Exception {
    long ITEM_ID = storeItemAndBids();
    UserTransaction tx = TM.getUserTransaction();
    try {
        tx.begin();
        EntityManager em = JPA.createEntityManager();
        {
            ItemBidSummary itemBidSummary = em.find(ItemBidSummary.class, ITEM_ID);
            // select * from (
            // select i.ID as ITEMID, i.ITEM_NAME as NAME, ...
            // ) where ITEMID = ?
            assertEquals(itemBidSummary.getName(), "AUCTION: Some item");
        }
        em.clear();
        {
            // Hibernate will synchronize the right tables before querying
            Item item = em.find(Item.class, ITEM_ID);
            item.setName("New name");
            // No flush before retrieval by identifier!
            // ItemBidSummary itemBidSummary = em.find(ItemBidSummary.class, ITEM_ID);
            // Automatic flush before queries if synchronized tables are affected!
            Query query = em.createQuery("select ibs from ItemBidSummary ibs where ibs.itemId = :id");
            ItemBidSummary itemBidSummary = (ItemBidSummary) query.setParameter("id", ITEM_ID).getSingleResult();
            assertEquals(itemBidSummary.getName(), "AUCTION: New name");
        }
        tx.commit();
        em.close();
    } finally {
        TM.rollback();
    }
}