Examples of org.odmg.Transaction.lock()

org.odmg.Transaction.lock()
Upgrade the lock on the given object to the given lock mode. The call has no effect if the object's current lock is already at or above that level of lock mode. @param obj The object to acquire a lock on. @param lockMode The lock mode to acquire. The lock modes are READ,UPGRADE, and WRITE. @exception LockNotGrantedException Is thrown if the given lock mode could not be acquired.

        database.makePersistent(a);
        database.makePersistent(b);
        tx.commit();


        tx.begin();
        tx.lock(a, Transaction.WRITE);
        tx.lock(b, Transaction.WRITE);
        a.setRelatedB(b);
        b.setRelatedA(a);
        tx.commit();

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        /* One possibility of storing objects is to use the current transaction
         associated with the container */
        Transaction tx = odmg.currentTransaction();
        for (Iterator iterator = objects.iterator(); iterator.hasNext();)
        {
            tx.lock(iterator.next(), Transaction.WRITE);
        }
        return objects;
    }


    /**

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        database.makePersistent(b);
        tx.commit();


        tx.begin();
        tx.lock(a, Transaction.WRITE);
        tx.lock(b, Transaction.WRITE);
        a.setRelatedB(b);
        b.setRelatedA(a);
        tx.commit();


         /**

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        {
            b = (ObjectB)it.next();
            a = b.getRelatedA();
            if (a != null)
            {
                tx.lock(a, Transaction.WRITE);
                a.setRelatedB(null);    // break relationship to avoid ri violation
            }
            database.deletePersistent(b);
        }

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         order necessary?
         if this doesn't make sense remove the test
         */
        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();


        tx = odmg.newTransaction();

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         if this doesn't make sense remove the test
         */
        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();


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

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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();


        tx = odmg.newTransaction();
        tx.begin();
        // make sure all objects are retrieved freshly in subsequent transactions

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            /* One possibility of storing objects is to use the current transaction
             associated with the container */
            Transaction tx = odmg.currentTransaction();
            for (Iterator iterator = objects.iterator(); iterator.hasNext();)
            {
                tx.lock(iterator.next(), Transaction.WRITE);
            }
        }
        catch (LockNotGrantedException e)
        {
            log.error("Failure while storing objects " + objects, e);

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        Transaction tx = odmg.newTransaction();
        tx.begin();
        // add objects to list
        for (int i = 0; i < 5; i++)
        {
            tx.lock(createObject(name), Transaction.WRITE);
        }
        tx.commit();


        tx.begin();
        // query test objects

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        // check result list size
        assertEquals(5, ret.size());
        // do read lock
        for (Iterator it = ret.iterator(); it.hasNext(); )
        {
            tx.lock(it.next(), Transaction.READ);
        }
        // create new list for results
        ArrayList result = new ArrayList();
        result.addAll(ret);
        tx.commit();

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