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public List<Product> findAllProducts(){
        Query query = null;
        List<Product> products = null;
        try {
            Context ctx = (Context) new javax.naming.InitialContext().lookup("java:comp/env");
            utx.begin();
            EntityManager em = (EntityManager) ctx.lookup("persistence/LogicalName");

            query = em.createQuery("SELECT * FROM CUSTOMERS");
            products = query.getResultList();

            utx.commit();
        } catch(Exception e) {
            Logger.getLogger(getClass().getName()).log(Level.SEVERE,"exception caught", e);
            throw new RuntimeException(e);
        }
        return products;
    }