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.


            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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        {
            CollectibleA collectible = (CollectibleA) iterator.next();
            Gatherer gat = collectible.getGatherer();
            assertNotNull(gat);
            assertEquals("Gatherer_"+name, gat.getName());
            tx.lock(collectible, Transaction.WRITE);
            collectible.getGatherer().setName("New_"+name);
        }
        tx.commit();


        tx.begin();

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        {
            CollectibleA collectible = (CollectibleA) iterator.next();
            Gatherer gat = collectible.getGatherer();
            assertNotNull(gat);
            assertEquals("New_"+name, gat.getName());
            tx.lock(collectible, Transaction.WRITE);
            collectible.setGatherer(null);
        }
        tx.commit();


        tx.begin();

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            kevin.setMother(mum);
            kevin.setFather(dad);


            Transaction tx = odmg.newTransaction();
            tx.begin();
            tx.lock(kevin, Transaction.WRITE);
            tx.commit();


            tx = odmg.newTransaction();
            tx.begin();
            ((HasBroker) tx).getBroker().clearCache();

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        ODMGGourmet gourmet = (ODMGGourmet)result.get(0);


        /*
        now we lock main object and add a new reference object
        */
        tx.lock(gourmet, Transaction.WRITE);
        gourmet.addFavoriteFood(goldfish);
        tx.commit();


        query = odmg.newOQLQuery();
        query.create("select fishs from " + Fish.class.getName() +

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        assertEquals(3, gourmet_doris.getFavoriteFood().size());


        /*
        now we lock main object and add remove a reference object
        */
        tx.lock(gourmet_doris, Transaction.WRITE);
        List foodList = gourmet_doris.getFavoriteFood();
        foodList.remove(0);
        //gourmet_doris.setFavoriteFood(foodList);
        tx.commit();

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    private void storeObject(Object obj) throws Exception
    {
        Transaction tx = odmg.newTransaction();


        tx.begin();
        tx.lock(obj, Transaction.WRITE);
        tx.commit();
    }


    public static synchronized int newThreadKey()
    {

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        site = new Site();
        site.setName(name);
        site.setYear(new Integer(year));
        site.setSemester(new Integer(semester));


        tx.lock(site, Transaction.WRITE);
        tx.commit();
    }


    public void testSimpleQueryDelete() throws Exception
    {

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        db.open(databaseName, Database.OPEN_READ_WRITE);
        Site site = new Site();
        site.setName(name);
        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(site, Transaction.WRITE);
        tx.commit();


        OQLQuery query = odmg.newOQLQuery();
        query.create("select sites from " + Site.class.getName() + " where name=$1");
        query.bind(name);

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            Site site = new Site();
            site.setName(name);


            Transaction tx = odmg.newTransaction();
            tx.begin();
            tx.lock(site, Transaction.WRITE);
            tx.commit();


            /* Retrieve from the object created, and set the year*/
            OQLQuery query = odmg.newOQLQuery();
            query.create(queryString);

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