Транзакции в EJB

        try {
            Product product = EJBProperties.productHome.findByPrimaryKey(productId);
            Integer id = newId(EJBProperties.HOME_BUILD);
            build = EJBProperties.buildHome.create(id, buildNumber);
            build.setProduct(product);
            build.setBuildDate(buildDate);
            if (true) throw new Exception('some error here, blin');
        } catch (Exception e) {
            Utils.generalLogger.severe(e);
            Utils.generalLogger.severe('rolling back transaction...');
            sessionContext.setRollbackOnly();
            throw new CreateException('Exception while creating build (nr=' + buildNumber + '). ' + e);
        }

        Build build;
        UserTransaction ut = sessionContext.getUserTransaction();
 
        try {
            ut.begin();
            Product product = EJBProperties.productHome.findByPrimaryKey(productId);
            Integer id = newId(EJBProperties.HOME_BUILD);
            build = EJBProperties.buildHome.create(id, buildNumber);
            build.setProduct(product);
            build.setBuildDate(buildDate);
            if (true) throw new Exception('some error here, blin');
            ut.commit();
        } catch (Exception e) {
            Utils.generalLogger.severe(e);
            Utils.generalLogger.severe('BMT: rolling back transaction...');
//            sessionContext.setRollbackOnly();
            try {
                ut.rollback();
            } catch (SystemException ex) {
                Utils.generalLogger.severe('Rollback failed: ' + ex);
                ex.printStackTrace();
            }
            throw new CreateException('Exception while creating build (nr=' + buildNumber + '). ' + e);
        }
 
        return build;

    public void deleteBuild(java.lang.Integer buildId) throws RemoveException {
        try {
            Build build = EJBProperties.buildHome.findByPrimaryKey(buildId);
            build.remove();
            sessionContext.setRollbackOnly();
            throw new RemoveException('I don't want to delete it. =:-)');
        } catch (FinderException e){
            throw new RemoveException('can't delete Build: build not found with id=' + buildId);
        }
    }