A register each time in transactions of 1000 elements

JpaSimpleInsertInBlocks.java

EntityTransaction tx = entityManager.getTransaction();
Iterator<TripEntity> iterator = trips.iterator();
tx.begin();
int cont = 0;
while (iterator.hasNext()) {
    entityManager.persist(iterator.next());
    cont++;
    if (cont % batchSize == 0) {
        tx.commit();
        tx.begin();
    }
}
tx.commit();