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.begin();
            query = odmg.newOQLQuery();
            query.create(strQuery);
            result = (List) query.execute();
            tx.commit();
        }
        finally
        {
            if (tx != null && tx.isOpen())
            {

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            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);
            result = (List) query.execute();

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            tx.begin();
            query = odmg.newOQLQuery();
            query.create(strQuery);
            result = (List) query.execute();
            tx.commit();
        }
        finally
        {
            if (tx != null && tx.isOpen())
            {

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         * lock only the father, let OJB do the rest
         */
        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(father, Transaction.WRITE);
        tx.commit();


        // without running tx, should not take effect
        father.setChildren(null);
        father.setFirstname(null);

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        assertEquals(
                "children's names are equal",
                Arrays.asList(getFirstNames(returnedChildren)),
                Arrays.asList(getFirstNames(children)));
        // System.out.println(Arrays.asList(getFirstNames(returnedChildren)));
        tx.commit();


        /*
         delete father then children
         fk-constraints?
         */

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        tx.begin();
        database.deletePersistent(returnedFather);
        database.deletePersistent(returnedFather.getChildren()[0]);
        database.deletePersistent(returnedFather.getChildren()[1]);


        tx.commit();


        qry = odmg.newOQLQuery();
        qry.create("select a from " + PersonImpl.class.getName() + " where firstname=$1");
        qry.bind(firstnameFather);
        result = (Collection) qry.execute();

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        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(father, Transaction.WRITE);
        tx.lock(child_2, Transaction.WRITE);
        tx.lock(child_1, Transaction.WRITE);
        tx.commit();


        // without running tx, should not take effect
        father.setChildren(null);
        father.setFirstname(null);

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        assertEquals(
                "children's names are equal",
                Arrays.asList(getFirstNames(returnedChildren)),
                Arrays.asList(getFirstNames(children)));
        // System.out.println(Arrays.asList(getFirstNames(returnedChildren)));
        tx.commit();


        /*
         delete children then father
         fk-constraints?
         */

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         */
        tx.begin();
        database.deletePersistent(returnedFather.getChildren()[0]);
        database.deletePersistent(returnedFather.getChildren()[1]);
        database.deletePersistent(returnedFather);
        tx.commit();


        qry = odmg.newOQLQuery();
        qry.create("select a from " + PersonImpl.class.getName() + " where firstname=$1");
        qry.bind(firstnameFather);
        result = (Collection) qry.execute();

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        Transaction tx = odmg.newTransaction();
        tx.begin();
        tx.lock(child_1, Transaction.WRITE);
        tx.lock(child_2, Transaction.WRITE);
        tx.lock(father, Transaction.WRITE);
        tx.commit();


        // without running tx, should not take effect
        father.setChildren(null);
        father.setFirstname(null);

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