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();
        tx.lock(ro, Transaction.WRITE);
        ro.setName("test_step_3");
        tx.lock(ro, Transaction.WRITE);
        tx.commit();
    }


    public void testCheckCacheAfterRollback() throws Exception
    {
        RollbackObjectOne ro = null;

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        tx.lock(ro, Transaction.WRITE);


        ro_2 = new RollbackObjectOne();
        ro_2.setName(name);
        tx.lock(ro_2, Transaction.WRITE);
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        OQLQuery query = odmg.newOQLQuery();
        query.create("select all from " + RollbackObjectOne.class.getName() + " where name like $1");

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        tx.begin();
        OQLQuery query = odmg.newOQLQuery();
        query.create("select all from " + RollbackObjectOne.class.getName() + " where name like $1");
        query.bind(name);
        List list = (List) query.execute();
        tx.commit();
        assertEquals(2,list.size());


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

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        tx.begin();
        query = odmg.newOQLQuery();
        query.create("select all from " + RollbackObjectOne.class.getName() + " where name like $1");
        query.bind(name);
        list = (List) query.execute();
        tx.commit();
        assertEquals(2,list.size());
        assertNull(((RollbackObjectOne)list.get(0)).getDescription());
        assertNull(((RollbackObjectOne)list.get(1)).getDescription());


        // after tx another tx should be able to lock these objects

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        tx = odmg.newTransaction();
        tx.begin();
        tx.checkpoint();
        tx.checkpoint();
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        tx.commit();

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        tx.checkpoint();
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        tx.commit();


        // with same tx instance
        tx = odmg.newTransaction();
        tx.begin();
        tx.abort();

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        tx.abort();


        tx.begin();
        tx.checkpoint();
        tx.checkpoint();
        tx.commit();


        tx.begin();
        tx.commit();
    }

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        tx.checkpoint();
        tx.checkpoint();
        tx.commit();


        tx.begin();
        tx.commit();
    }


    public void testDoubleAbortTxCall() throws Exception
    {
        try

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            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)
        {
            if(tx != null && tx.isOpen()) tx.abort();

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    Iterator it = allTargets.iterator();
    while (it.hasNext())
    {
      database.deletePersistent(it.next());
    }
    tx.commit();
  }


    /**
     * test joins on same table
     *

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