<@U319ZJ3B4> , this is a quick replacement for spr...

# exposed

[janvladimirmostert]

@sss , this is a quick replacement for spring's `@Transactional`:

transaction { em ->
            em.persist(Order(description = "Testing"))
        }

And the code for that transaction block:

inline fun transaction(f: (em: EntityManager) -> Unit) {
    val em = EMF.createEntityManager()
    try {
        em.transaction.begin()
        f(em)
        em.transaction.commit()
    } catch (e: Exception){
        log.error(e.message, e)
        em.transaction.rollback()
    } finally {
        em.close()
    }
}