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


        // 4. acquire write lock on new object
        tx.lock(newProduct, Transaction.WRITE);


        // 5. commit transaction
        tx.commit();
    }
}

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        Implementation impl = OJB.getInstance();
        Transaction    tx   = impl.newTransaction();


        tx.begin();
        tx.lock(product, Transaction.WRITE);
        tx.commit();
    }


    /**
     * Finds the product with the given name.
     *

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        query.bind(name);


        DList   results = (DList)query.execute();
        Product product = (Product)results.iterator().next();


        tx.commit();
        return product;
    }


    /**
     * Sells the given amount of products.

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        tx.begin();


        tx.lock(product, Transaction.WRITE);
        product.setStock(product.getStock() -  number);


        tx.commit();
    }


    /**
     * Deletes the given product from the database.
     *

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        Database db = impl.getDatabase(product);


        db.deletePersistent(product);


        tx.commit();
    }


    /**
     * Stores any changes to the product in the database.
     *

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            query.create("select allproducts from " + Product.class.getName());


            // 4. perform the query and store the result in a persistent Collection
            DList allProducts = (DList) query.execute();


            tx.commit();


            // 5. now iterate over the result to print each product
            for (Iterator iter = allProducts.iterator(); iter.hasNext();)
            {
                System.out.println(iter.next());

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        try
        {
            db.bind(example, bindingName);
            Article value = (Article) db.lookup(bindingName);
            assertTrue("Could not lookup object for binding name: "+bindingName, value != null);
            tx.commit();
        }
        catch (ObjectNameNotFoundException ex)
        {
            // tx.abort();
            fail("name " + bindingName + " should not be unknown. "+ex.getMessage());

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        try
        {
            tx.begin();
            db.bind(example, bindingName);
            tx.commit();
            fail("We expected a ObjectNameNotUniqueException, but was not thrown");
        }
        catch (ObjectNameNotUniqueException ex)
        {
            // we wait for this exception

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        try
        {
            tx.begin();
            db.unbind(bindingName);
            tx.commit();
        }
        catch (ObjectNameNotFoundException ex)
        {
            fail("Can't unbind " + bindingName + ": "+ex.getMessage());
        }

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        catch (ObjectNameNotFoundException ex)
        {
            fail("Could not found bound DList, binding name was: "+bindingName);
        }
        foundList = null;
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        try
        {

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