public Long findAndModifyPersonalNumber(String name) {
    PersonalNumber personalNumber = mongoOperations
            .findAndModify(Query.query(where("name").is(name)), new Update().inc("personalNumber", 1L), options().returnNew(true), PersonalNumber.class);
        if (personalNumber == null) {
            //save the name with default personalNumber
            //return personalNumber
        }
        return personalNumber.getPersonalNumber();
}