Examples with Transaction javax.jdo.Transaction used on opensource projects

Example 6 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class GuideToJDO method DeleteProducts.

@SuppressWarnings("rawtypes")
public void DeleteProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Query query = pm.newQuery(Product.class, "name == \"Android Phone\"");
        Collection result = (Collection) query.execute();
        Product product = (Product) result.iterator().next();
        pm.deletePersistent(product);
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}

Example 7 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class GuideToJDO method CreateProducts.

public void CreateProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Product product = new Product("Tablet", 80.0);
        pm.makePersistent(product);
        Product product2 = new Product("Phone", 20.0);
        pm.makePersistent(product2);
        Product product3 = new Product("Laptop", 200.0);
        pm.makePersistent(product3);
        for (int i = 0; i < 100; i++) {
            String nam = "Product-" + i;
            double price = rnd.nextDouble();
            Product productx = new Product(nam, price);
            pm.makePersistent(productx);
        }
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}

Example 8 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class GuideToJDO method QueryJDOQL.

@SuppressWarnings({ "rawtypes", "unchecked" })
public void QueryJDOQL() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        // Declarative JDOQL :
        LOGGER.log(Level.INFO, "Declarative JDOQL --------------------------------------------------------------");
        Query qDJDOQL = pm.newQuery(Product.class);
        qDJDOQL.setFilter("name == 'Tablet' && price == price_value");
        qDJDOQL.declareParameters("double price_value");
        List<Product> resultsqDJDOQL = qDJDOQL.setParameters(80.0).executeList();
        Iterator<Product> iterDJDOQL = resultsqDJDOQL.iterator();
        while (iterDJDOQL.hasNext()) {
            Product p = iterDJDOQL.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}

Example 9 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class MyApp method persistObject.

public static void persistObject(Object obj) {
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        pm.makePersistent(obj);
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
    }
}

Example 10 with Transaction

use of javax.jdo.Transaction in project tests by datanucleus.

the class StorageTester method validateObjects.

protected void validateObjects(Class c) throws Exception {
    // Read them back and verify that they contain what they should
    TestHelper.LOG.info("Validating " + TEST_OBJECT_COUNT + " " + c.getName() + " objects:");
    TestHelper.LOG.info("  Normal read");
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        TestObject[] loaded = new TestObject[TEST_OBJECT_COUNT];
        for (int i = 0; i < TEST_OBJECT_COUNT; ++i) {
            tx.begin();
            TestObject obj = (TestObject) pm.getObjectById(ids[i], true);
            assertFieldsEqual(objs[i], obj);
            loaded[i] = obj;
            tx.commit();
        }
    } catch (Exception e) {
        TestHelper.LOG.error("StorageTester.validateObjects exception thrown", e);
        throw e;
    } finally {
        if (tx.isActive())
            tx.rollback();
        pm.close();
    }
    /*
         * Read some of them back and verify them using non-transactional reads.
         * Only some are done because non-transactional reads are much slower
         * unless connection pooling is used (eventually we should use pooling
         * when testing).
         */
    TestHelper.LOG.info("  Non-transactional read");
    pm = pmf.getPersistenceManager();
    tx = pm.currentTransaction();
    try {
        tx.setNontransactionalRead(true);
        for (int i = 0; i < TEST_OBJECT_COUNT; i += 10) {
            TestObject obj = (TestObject) pm.getObjectById(ids[i], false);
            assertFieldsEqual(objs[i], obj);
        }
    } catch (Exception e) {
        TestHelper.LOG.error("StorageTester.validateObjects exception thrown", e);
        throw e;
    } finally {
        pm.close();
    }
    // Read some of them back, verify them, then verify values get retained after commit when retainValues mode is on
    TestHelper.LOG.info("  Retain values mode");
    pm = pmf.getPersistenceManager();
    tx = pm.currentTransaction();
    try {
        tx.setRetainValues(true);
        tx.begin();
        TestObject[] loaded = new TestObject[TEST_OBJECT_COUNT];
        for (int i = 0; i < TEST_OBJECT_COUNT; i += 10) {
            TestObject obj = (TestObject) pm.getObjectById(ids[i], true);
            assertFieldsEqual(objs[i], obj);
            loaded[i] = obj;
        }
        tx.commit();
        for (int i = 0; i < TEST_OBJECT_COUNT; i += 10) assertFieldsEqual(objs[i], loaded[i]);
    } catch (Exception e) {
        TestHelper.LOG.error("StorageTester.validateObjects exception thrown", e);
        throw e;
    } finally {
        if (tx.isActive())
            tx.rollback();
        pm.close();
    }
}