Examples of org.exolab.castor.jdo.Database.begin()

org.exolab.castor.jdo.Database.begin()
Begin a new transaction. A transaction must be open in order to query and persist objects. @throws PersistenceException A transaction is already open onthis database, or an error reported by the persistence engine

    }


    public void testLoadTruck() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Truck truck = (Truck) database.load(Truck.class, new Integer(5));
        database.commit();
        
        assertNotNull(truck);
        assertEquals(5, truck.getId());

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    }


    public void testLoadCar() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Object object = database.load(Car.class, new Integer(5));
        assertNotNull (object);
        assertEquals ("ctf.jdo.tc9x.Truck", object.getClass().getName());
        Truck truck = (Truck) object; 
        database.commit();

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    }


    public void testCreateAndLoadCar() throws Exception {
        Database database = _category.getDatabase();


        database.begin();
        Order order = new Order();
        order.setId(11);
        order.setName("order 11");
        database.create(order);
        database.commit();

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     * Test method.
     * @throws Exception For any exception thrown.
     */
    public void testQuerySortedCollection() throws Exception {
        Database db = _category.getDatabase();
        db.begin();
        
        OQLQuery query = db.getOQLQuery("SELECT c FROM "
                + SortedContainer.class.getName() + " c WHERE id = $1");
        query.bind(new Integer(1));
        QueryResults results = query.execute();

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        order.setId(11);
        order.setName("order 11");
        database.create(order);
        database.commit();
        
        database.begin();
        ProductDetail detail = new ProductDetail();
        detail.setId(11);
        detail.setCategory("category 11");
        detail.setLocation("location 11");
        database.create(detail);

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        detail.setCategory("category 11");
        detail.setLocation("location 11");
        database.create(detail);
        database.commit();
        
        database.begin();
        Truck truck = new Truck();
        truck.setId(11);
        truck.setName("truck 11");
        truck.setKw(112);
        truck.setMake("Fiat");

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        Collection orders = new LinkedList();
        orders.add(database.load(Order.class, new Integer(11)));
        truck.setOrders(orders);
        database.commit();
        
        database.begin();
        Object object = database.load(Car.class, new Integer(11));
        assertNotNull(object);
        assertEquals("ctf.jdo.tc9x.Truck", object.getClass().getName());
        Truck loadedTruck = (Truck) object; 
        database.commit();

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        database.commit();
        
        assertNotNull(loadedTruck);
        assertEquals(11, loadedTruck.getId());
        
        database.begin();
        database.remove(database.load (Car.class, new Integer(11)));
        database.remove(database.load (ProductDetail.class, new Integer(11)));
        database.remove(database.load(Order.class, new Integer(11)));
        database.commit();

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    }


    public void testLoadOwner() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Owner owner = (Owner) database.load(Owner.class, new Integer(1));
        database.commit();
        
        assertNotNull(owner);
        assertEquals(1, owner.getId().intValue());

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    }
   
    public void testLoadM() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        M m = (M) database.load(M.class, new Integer(1));
        database.commit();
        
        assertNotNull(m);
        assertEquals(1, m.getId());

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