Examples of org.odmg.Transaction.lock()

org.odmg.Transaction.lock()
Upgrade the lock on the given object to the given lock mode. The call has no effect if the object's current lock is already at or above that level of lock mode. @param obj The object to acquire a lock on. @param lockMode The lock mode to acquire. The lock modes are READ,UPGRADE, and WRITE. @exception LockNotGrantedException Is thrown if the given lock mode could not be acquired.

        {
            tx.begin();


            RollbackObjectOne ro = new RollbackObjectOne();
            ro.setName(name);
            tx.lock(ro, Transaction.WRITE);
            // this should fail
            tx.lock(new Exception(), Transaction.WRITE);


            tx.commit();
            fail("A exception was expected");

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            RollbackObjectOne ro = new RollbackObjectOne();
            ro.setName(name);
            tx.lock(ro, Transaction.WRITE);
            // this should fail
            tx.lock(new Exception(), Transaction.WRITE);


            tx.commit();
            fail("A exception was expected");
        }
        catch(Exception e)

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            OQLQuery query = odmg.newOQLQuery();
            query.create(strQuery);
            result = (List) query.execute();
            before = result.size();


            tx.lock(child, Transaction.WRITE);
            tx.commit();


            tx.begin();
            query = odmg.newOQLQuery();
            query.create(strQuery);

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         */
        Transaction tx = odmg.newTransaction();
        tx.begin();
        ProductGroup group = new ProductGroup();
        group.setGroupName(name);
        tx.lock(group, Transaction.WRITE);
        for (int i = 0; i < COUNT; i++)
        {
            Article article = createArticle(name);
            group.add(article);
        }

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            //bI should now be a dynamic proxy
            assertTrue(ProxyHelper.isProxy(bI));


            TestClassAWithBProxy a = new TestClassAWithBProxy();
            a.setBProxy(bI);
            tx.lock(a, Transaction.WRITE);
            tx.commit();


            //on commit the foreign key in "a" should have been set to
            //bOid
            String aBOid = a.getBoid();

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        {
            for (int i = 0; i < arr.length; i++)
            {
                Transaction tx = odmg.newTransaction();
                tx.begin();
                tx.lock(arr[i], Transaction.WRITE);
                m_tx.markDirty(arr[i]);
                tx.commit();
            }
        }

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        long start = System.currentTimeMillis();
        tx.begin();
        // update all objects
        for(int i = 0; i < articleCount; i++)
        {
            tx.lock(arr[i], Transaction.WRITE);
            arr[i].setPrice(arr[i].getPrice() * 1.95583);
        }
        tx.commit();
        long stop = System.currentTimeMillis();
        logger.info("updating " + articleCount + " Objects: " + (stop - start) + " msec");

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                    fail("Unexpected exception: " + e.getMessage());
                }
                // use new tx to check released locks for objects
                tx = odmg1.newTransaction();
                tx.begin();
                tx.lock(toBeEdited, Transaction.UPGRADE);
                tx.commit();
            }
            else
            {
                tx.abort();

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        }
        else
        {
            try
            {
                tx.lock(bean, Transaction.WRITE);
                tx.commit();
            }
            catch(Exception e)
            {
                e.printStackTrace();

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        Database db = odmg.newDatabase();
        db.open(TestHelper.DEF_DATABASE_NAME, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(obj_1, Transaction.WRITE);
        tx.lock(obj_2, Transaction.WRITE);
        tx.lock(obj_3, Transaction.WRITE);
        tx.commit();


        Criteria crit = new Criteria();

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