Examples of org.odmg.Transaction

org.odmg.Transaction
This interfaces provides the operations necessary to perform database transactions. All access, creation, and modification of persistent objects and their fields must be done within a transaction. Before performing any database operations, a thread must explicitly create a transaction object or associate itself with an existing transaction object (by calling join), and that transaction must be open (through a call to begin). All subsequent operations by the thread, including reads, writes, and lock acquisitions, are done under the thread�s current transaction.
A thread may only operate on its current transaction. For example, a TransactionNotInProgressException is thrown if a thread attempts to begin, commit, checkpoint, or abort a transaction prior to joining itself to that transaction.
A transaction is either open or closed. A transaction is open if a call has been made to begin, but no call has been made to commit or abort. Once commit or abort is called, the transaction is closed. The method isOpen can be called to determine the state of the transaction.
Read locks are implicitly obtained on objects as they are accessed. Write locks are implicitly obtained as objects are modified. Transaction objects are transient, they cannot be stored in the database. @author David Jordan (as Java Editor of the Object Data Management Group) @version ODMG 3.0 @see TransactionNotInProgressException


    public void testDoubleAbortTxCall() throws Exception
    {
        try
        {
            Transaction tx = odmg.newTransaction();
            tx.begin();
            tx.abort();
            tx.abort();
        }
        catch(Exception e)
        {
            e.printStackTrace();
            throw e;

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        }
    }


    public void testInternalCausedRollback() throws Exception
    {
        Transaction tx = odmg.newTransaction();
        String name = "testCheckCacheAfterRollback_"+System.currentTimeMillis();
        try
        {
            tx.begin();


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

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    protected void tearDown() throws Exception
    {
        super.tearDown();
        try
        {
            Transaction currentTx = odmg.currentTransaction();
            if(currentTx != null && currentTx.isOpen())
            {
                currentTx.abort();
            }
        }
        catch(Exception e)
        {
        }

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  }


    private void deleteData(Class target)
      throws Exception
  {
    Transaction tx = odmg.newTransaction();
    tx.begin();
    OQLQuery query = odmg.newOQLQuery();
    query.create("select allStuff from " + target.getName());
    Collection allTargets = (Collection) query.execute();
    Iterator it = allTargets.iterator();
    while (it.hasNext())
    {
      database.deletePersistent(it.next());
    }
    tx.commit();
  }

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    joe.setFather(father);
    joe.setFirstname("joe");
    joe.setId(joeID);


    Transaction tx = odmg.newTransaction();
    tx.begin();
    database.makePersistent(father);
    database.makePersistent(mother);
    database.makePersistent(jimmy);
    database.makePersistent(joe);
    tx.commit();


        // read using id
    tx = odmg.newTransaction();
    tx.begin();
    query = odmg.newOQLQuery();
    query.create("select person from " + PersonImpl.class.getName() +
           " where (mother.id=$1 or father.id=$2)");
    query.bind(new Integer(motherID));
    query.bind(new Integer(fatherID));
    persons = (List) query.execute();
        assertEquals(2, persons.size());
    tx.commit();


        // read using firstname
        tx = odmg.newTransaction();
        tx.begin();
        query = odmg.newOQLQuery();
        query.create("select person from " + PersonImpl.class.getName() +
                     " where (mother.firstname=$1 or father.firstname=$2)");
        query.bind("mom");
        query.bind("dad");
        persons = (List) query.execute();
        assertEquals(2, persons.size());
        tx.commit();
  }

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    TestClassB b1 = new TestClassB();
    TestClassB b2 = new TestClassB();
    a1.setB(b1);
    a2.setB(b2);


    Transaction tx = odmg.newTransaction();
    tx.begin();
    database.makePersistent(a1);
    database.makePersistent(a2);
    database.makePersistent(b1);
    database.makePersistent(b2);
    tx.commit();
    tx = odmg.newTransaction();
    tx.begin();
    // get the right values
    OQLQuery query = odmg.newOQLQuery();
    query.create("select a from " + TestClassA.class.getName());
    List As = (List) query.execute();
    Iterator asIterator = As.iterator();
    TestClassA temp = null;


    temp = (TestClassA) asIterator.next();
    String bID1 = temp.getB().getOid();
    temp = (TestClassA) asIterator.next();
    String bID2 = temp.getB().getOid();


    query = odmg.newOQLQuery();
    query.create("select a from " + TestClassA.class.getName() +
           " where (b.oid=$1 or b.oid=$2)");
    query.bind(bID1);
    query.bind(bID2);
    As = (List) query.execute();
    assertTrue(As.size() == 2);
    tx.commit();
  }

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        CollectibleA coll_2 = new CollectibleA(name);


        coll_1.setGatherer(gat_1);
        coll_2.setGatherer(gat_2);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        db.makePersistent(coll_1);
        db.makePersistent(coll_2);
        tx.commit();


        tx.begin();
        ((TransactionExt)tx).getBroker().clearCache();
        OQLQuery query = odmg.newOQLQuery();
        query.create(queryStr);
        query.bind(name);
        Collection result = (Collection) query.execute();
        assertNotNull(result);
        assertEquals(2, result.size());


        for (Iterator iterator = result.iterator(); iterator.hasNext();)
        {
            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();
        ((TransactionExt)tx).getBroker().clearCache();
        query = odmg.newOQLQuery();
        query.create(queryStr);
        query.bind(name);
        result = (Collection) query.execute();
        assertNotNull(result);
        assertEquals(2, result.size());


        for (Iterator iterator = result.iterator(); iterator.hasNext();)
        {
            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();
        ((TransactionExt)tx).getBroker().clearCache();
        query = odmg.newOQLQuery();
        query.create(queryStr);
        query.bind(name);
        result = (Collection) query.execute();
        assertNotNull(result);
        assertEquals(2, result.size());


        for (Iterator iterator = result.iterator(); iterator.hasNext();)
        {
            CollectibleA collectible = (CollectibleA) iterator.next();
            Gatherer gat = collectible.getGatherer();
            assertNull(gat);
        }
        tx.commit();
    }

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            kevin.setFirstname("Kevin");
            kevin.setLastname("Gray");
            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();
            OQLQuery qry = odmg.newOQLQuery();
            qry.create("select a from " + PersonImpl.class.getName() + " where firstname=$1");
            qry.bind("Kevin");


            DList result = (DList) qry.execute();
            Person boy = (Person) result.get(0);
            assertEquals(boy.getFirstname(), kevin.getFirstname());
            assertEquals(boy.getFather().getFirstname(), dad.getFirstname());
            assertEquals(boy.getMother().getFirstname(), mum.getFirstname());


            tx.commit();
        }
        catch (Throwable t)
        {
            t.printStackTrace();
            fail(t.getMessage());

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    public void doTestStore() throws Exception
    {
        String postfix = "doTestStore_" + System.currentTimeMillis();
        Movie movie = buildMovieWithActors(postfix);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        database.makePersistent(movie);
        tx.commit();


        OQLQuery queryMovie = movieQuery(postfix);
        Collection resultMovie = (Collection) queryMovie.execute();
        assertEquals(1, resultMovie.size());
        Movie newMovie = (Movie) resultMovie.iterator().next();

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    public void doTestStore_2() throws Exception
    {
        String postfix = "doTestStore_2_" + System.currentTimeMillis();
        Movie movie = buildMovieWithActors(postfix);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        Iterator it = movie.getActors().iterator();
        while(it.hasNext())
        {
            database.makePersistent(it.next());
        }
        database.makePersistent(movie);
        tx.commit();


        OQLQuery queryMovie = movieQuery(postfix);
        Collection resultMovie = (Collection) queryMovie.execute();
        assertEquals(1, resultMovie.size());
        Movie newMovie = (Movie) resultMovie.iterator().next();

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