gsaw

return Objects.compare(o1, o2,
                Comparator.<Worker, String>comparing(key -> key.fio().surname())
                        .thenComparing(key -> key.fio().name())
                        .thenComparing(Worker::salary)
                        .thenComparing(Worker::hiredOn));

class WorkerComparator implements Comparator<Worker> {
    final static Comparator<String> safeString = Comparator.nullsFirst(Comparator.naturalOrder());
    final static Comparator<Integer> safeInteger = Comparator.nullsFirst(Comparator.naturalOrder());
    final static Comparator<LocalDateTime> safeLocalDateTime = Comparator.nullsFirst(Comparator.naturalOrder());

    @Override
    public int compare(Worker o1, Worker o2) {

        return Objects.compare(o1, o2,
                Comparator.<Worker, String>comparing(key -> key.fio().surname(), safeString)
                        .thenComparing(key -> key.fio().name(), safeString)
                        .thenComparing(Worker::salary, safeInteger)
                        .thenComparing(Worker::hiredOn, safeLocalDateTime));
    }
}

modelMapper.addMappings(new PropertyMap<Segment, SegmentEntity>() {
            @Override
            protected void configure() {
                skip(destination.getStartNode());
                skip(destination.getTargetNode());
            }
        });

@Bean(name = "dwhTransactionManager")
    @Primary
    public PlatformTransactionManager dwhTransactionManager(@Qualifier("dwhDatasource") DataSource ds) {
        return new DataSourceTransactionManager(ds);
    }

Assume that we will clear the EntityManager after the call.