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.

            List result = (List) query.execute();
            assertEquals(1, result.size());
            site = (Site) result.get(0);
            assertNotNull(site);
            assertNull(site.getYear());
            tx.lock(site, Transaction.UPGRADE);
            site.setYear(new Integer(2003));


            tx.commit();


            /* Flush the cache, and retrieve the object again */

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

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        while (it.hasNext())
        {
            Article article = createArticle(i++);
            article.setArticleName("OneToManyUpdateTest");
            temp = (InterfaceProductGroup) it.next();
            tx.lock(temp, Transaction.WRITE);
            temp.add(article);
            article.setProductGroup(temp);
        }
        tx.commit(); // thma: during this commit no article is persisted! works as designed!

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            //get a dynamic proxy object
            TestClassBProxy b = new TestClassBProxy();
            new Identity(b,((HasBroker)tx).getBroker());




            tx.lock(b, Transaction.WRITE);
            tx.commit();
            String bOid = b.getOid();


            //reload the object created in the previous step
            tx = odmg.newTransaction();

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            //bI should now be a dynamic proxy
            assertTrue(bI instanceof Proxy);


            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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        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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        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();
        crit.addEqualTo("name", name);

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        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();
        crit.addEqualTo("name", name);
        QueryByCriteria query = QueryFactory.newQuery(MainObject.class, crit);

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        /**
         * do the reassignment
         */
        tx.begin();
        tx.lock(version, Transaction.WRITE);
        tx.lock(version2, Transaction.WRITE);
        version.setContract(contract2);
        version2.setContract(contract);
        tx.commit();

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        /**
         * do the reassignment
         */
        tx.begin();
        tx.lock(version, Transaction.WRITE);
        tx.lock(version2, Transaction.WRITE);
        version.setContract(contract2);
        version2.setContract(contract);
        tx.commit();


        /**

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