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

        database.begin();
        database.remove(database.load(Laptop.class, new Integer(10)));
        database.remove(database.load(ProductDetail.class, new Integer(10)));
        database.commit();
        
        database.begin();
        try {
            laptop = (Laptop) database.load(Laptop.class, new Integer(10));
            fail("Laptop with id 10 still exists.");
        } catch (ObjectNotFoundException e) {
           assertEquals("The object of type ctf.jdo.tc9x.Laptop with identity <10(10)> "

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    public void testReadWriteCached() throws Exception {
        long start = System.currentTimeMillis();
        
        Database db =  _jdo.getDatabase();
        db.begin();
        
        long begin = System.currentTimeMillis();
        
        OQLQuery query = db.getOQLQuery(
                "SELECT o FROM " + Service.class.getName() + " o order by o.id");

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    }


    public void testLoadLaptopMulti() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        LaptopMulti laptop = (LaptopMulti) database.load(LaptopMulti.class,
                new Identity(new Integer (1), new Integer(1)));
        database.commit();
        
        assertNotNull(laptop);

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    public void testReadOnlyEmpty() throws Exception {
        long start = System.currentTimeMillis();
        
        Database db =  _jdo.getDatabase();
        db.getCacheManager().expireCache();
        db.begin();
        
        long begin = System.currentTimeMillis();
        
        OQLQuery query = db.getOQLQuery(
                "SELECT o FROM " + Service.class.getName() + " o order by o.id");

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    }


    public void testLoadServer() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Server server = (Server) database.load(Server.class, new Integer(3));
        database.commit();
        
        assertNotNull(server);
        assertEquals("ctf.jdo.tc9x.Server", server.getClass().getName());

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    }


    public void testLoadServerMulti() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        ServerMulti server = (ServerMulti) database.load(ServerMulti.class,
                new Identity(new Integer(3), new Integer(3)));
        database.commit();
        
        assertNotNull(server);

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    public void testReadOnlyCached() throws Exception {
        long start = System.currentTimeMillis();
        
        Database db =  _jdo.getDatabase();
        db.begin();
        
        long begin = System.currentTimeMillis();
        
        OQLQuery query = db.getOQLQuery(
                "SELECT o FROM " + Service.class.getName() + " o order by o.id");

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    }
    
    public void testLoadComputer() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Computer computer = (Computer) database.load(Computer.class, new Integer(2));
        database.commit();
        
        assertNotNull(computer);
        assertEquals("ctf.jdo.tc9x.Laptop", computer.getClass().getName());

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


        database.begin();
        Order order = new Order();
        order.setId(12);
        order.setName("order 12");
        database.create(order);
        database.commit();

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    public void testReadWriteOidEmpty() throws Exception {
        long start = System.currentTimeMillis();
        
        Database db =  _jdo.getDatabase();
        db.getCacheManager().expireCache();
        db.begin();
        
        long begin = System.currentTimeMillis();
        
        OQLQuery query = db.getOQLQuery(
                "CALL SQL select PTF_SERVICE.ID as ID "

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