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

        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        Object obj = database.lookup(name);
        tx.commit();
        assertNotNull("binded DList not found", obj);


        // iterate list
        Iterator iter = list.iterator();
        while (iter.hasNext())

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        tx = odmg.newTransaction();
        tx.begin();
        ((TransactionExt) odmg.currentTransaction()).getBroker().clearCache();
        DList lookedUp = (DList) database.lookup(name);
        tx.commit();
        assertNotNull("binded DList not found", lookedUp);


        //System.out.println("sequence of items in lookedup list:");
        iter = lookedUp.iterator();
        Iterator iter1 = list.iterator();

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        {
            DObject a = createObject(name);
            list.add(a);
        }
        assertEquals(5, list.size());
        tx.commit();


        // delete two items
        tx = odmg.newTransaction();
        tx.begin();
        ((HasBroker) odmg.currentTransaction()).getBroker().clearCache();

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        DList lookedUp = (DList) database.lookup(name);
        assertNotNull("database lookup does not find the named DList", lookedUp);
        assertEquals("Wrong number of list entries", 5, lookedUp.size());
        lookedUp.remove(2);
        lookedUp.remove(1);
        tx.commit();


        // check if deletion was successful
        tx = odmg.newTransaction();
        tx.begin();
        ((HasBroker) odmg.currentTransaction()).getBroker().clearCache();

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        // check if deletion was successful
        tx = odmg.newTransaction();
        tx.begin();
        ((HasBroker) odmg.currentTransaction()).getBroker().clearCache();
        lookedUp = (DList) database.lookup(name);
        tx.commit();


        assertEquals(3, lookedUp.size());
    }

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        Transaction tx = odmg.newTransaction();
        tx.begin();
        DList list = odmg.newDList();
        database.bind(list, name);
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        for (int i = 0; i < 5; i++)
        {

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        }


        list.add(2, createObject(name+"_pos2"));
        list.add(0, createObject(name+"_pos0"));
        list.add(7, createObject(name+"_pos7"));
        tx.commit();


        tx.begin();
        ((TransactionImpl) tx).getBroker().clearCache();
        // System.out.println("list: " + list);
        // System.out.println("lookup list: " + db.lookup(name));

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        tx.begin();
        ((TransactionImpl) tx).getBroker().clearCache();
        // System.out.println("list: " + list);
        // System.out.println("lookup list: " + db.lookup(name));
        tx.commit();


        //System.out.println("sequence of items in list:");
        Iterator iter = list.iterator();
        DObject a;
        while (iter.hasNext())

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        iter = lookedUp.iterator();
        while (iter.hasNext())
        {
            a = (DObject) iter.next();
        }
        tx.commit();
    }


    public void testDBag() throws Exception
    {
        String name = "testDBag_" + System.currentTimeMillis();

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        assertEquals("should contain only 1 element", 1, bag3.size());


        bag3 = bag1.intersection(bag2);
        assertEquals("should contain two elements", 2, bag3.size());


        tx.commit();
    }


    public static class DObject
    {
        Integer id;

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