Examples of org.odmg.Transaction.commit()

org.odmg.Transaction.commit()
Commit and close the transaction. Calling commit commits to the database all persistent object modifications within the transaction and releases any locks held by the transaction. A persistent object modification is an update of any field of an existing persistent object, or an update or creation of a new named object in the database. If a persistent object modification results in a reference from an existing persistent object to a transient object, the transient object is moved to the database, and all references to it updated accordingly. Note that the act of moving a transient object to the database may create still more persistent references to transient objects, so its referents must be examined and moved as well. This process continues until the database contains no references to transient objects, a condition that is guaranteed as part of transaction commit. Committing a transaction does not remove from memory transient objects created during the transaction

        Transaction tx = odmg.newTransaction();
        tx.begin();
        testProductGroup = new ProductGroup();
        testProductGroup.setGroupName("NamedRootsTest_" + System.currentTimeMillis());
        database.makePersistent(testProductGroup);
        tx.commit();
    }


    private Article createArticle()
    {
        Article example = new Article();

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        database.bind(article, bindingName);
        foundArticle = (Article) database.lookup(bindingName);


        foundArticle = null;
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        foundArticle = (Article) database.lookup(bindingName);
        assertNotNull(foundArticle);

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        tx = odmg.newTransaction();
        tx.begin();
        foundArticle = (Article) database.lookup(bindingName);
        assertNotNull(foundArticle);
        database.unbind(bindingName);
        tx.commit();
    }




    public void testLookup() throws Exception
    {

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        Transaction tx = odmg.newTransaction();
        //bind object to name
        tx.begin();
        Article example = createArticle();
        database.makePersistent(example);
        tx.commit();


        // 1. perform binding
        tx.begin();
        try
        {

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        // 1. perform binding
        tx.begin();
        try
        {
            database.bind(example, name);
            tx.commit();
        }
        catch (ObjectNameNotUniqueException ex)
        {
            tx.abort();
            fail(ex.getMessage());

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        tx = odmg.newTransaction();
        tx.begin();
        try
        {
            database.unbind(name);
            tx.commit();
        }
        catch (ObjectNameNotFoundException ex)
        {
            tx.abort();
            fail("name " + name + "should be known");

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        Transaction tx = odmg.newTransaction();
        tx.begin();
        productGroup = new ProductGroup();
        productGroup.setName("DMapTest_" + System.currentTimeMillis() + "_");
        database.makePersistent(productGroup);
        tx.commit();
    }


    protected Article createArticle(String name) throws Exception
    {

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        // add objects to list
        for (int i = 0; i < 5; i++)
        {
            tx.lock(createObject(name), Transaction.WRITE);
        }
        tx.commit();


        tx.begin();
        // query test objects
        OQLQuery q = odmg.newOQLQuery();
        q.create("select all from "+DObject.class.getName()+" where name=$1");

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            tx.lock(it.next(), Transaction.READ);
        }
        // create new list for results
        ArrayList result = new ArrayList();
        result.addAll(ret);
        tx.commit();
    }


    public void testIterateWithoutTx() throws Exception
    {
        // create a unique name:

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            DObject a = createObject(name);
            list.add(a);
        }
        // bind the new list
        database.bind(list, name);
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        Object obj = database.lookup(name);
        tx.commit();

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