I have a Service class , in below code, after the bean is instantiated by Spring, the ‘getRepositoryInstance’ method is automatically invoked.

Inside this method, it retrieves an instance of a repository service from a factory object and assigns it to the identityRepoService variable.
In RepoService class, which has createRecord method which is calling createMapper() from Mapper class.

In Mapper class, I have to use repoService again to the get the records.

In Mapper class should I use the same postConstruct code that is in Service class?

But, when I use the same postConstruct code in Mapper class, getting null pointer for repoService.

class Service {

    @Autowired
    private RepoFactory factory;

    private RepoService repoService;

    @PostConstruct
    public void getRepositoryInstance() {
        repoService = factory.getRepositoryService();
    }

    public void create() {
        repoService.createRecord();
    }

}

@Service
@Qualifier("repoService")
class RepoService {

@Autowired
private mapper;

 createRecord(){
  mapper.createMapper();
}

@Component
class Mapper {

  createMapper(){
    repoService.getRecord();
  }
} ```