Consider defining a bean of type ‘package’ in your configuration [Spring-Boot]

I am getting the following error:

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method setApplicant in webService.controller.RequestController required a bean of type 'com.service.applicant.Applicant' that could not be found.


Action:

Consider defining a bean of type 'com.service.applicant.Applicant' in your configuration.

I have never seen this error before but it’s odd that the @Autowire is not working. Here is the project structure:

Applicant Interface

public interface Applicant {

    TApplicant findBySSN(String ssn) throws ServletException;

    void deleteByssn(String ssn) throws ServletException;

    void createApplicant(TApplicant tApplicant) throws ServletException;

    void updateApplicant(TApplicant tApplicant) throws ServletException;

    List<TApplicant> getAllApplicants() throws ServletException;
}

ApplicantImpl

@Service
@Transactional
public class ApplicantImpl implements Applicant {

private static Log log = LogFactory.getLog(ApplicantImpl.class);

    private TApplicantRepository applicantRepo;

@Override
    public List<TApplicant> getAllApplicants() throws ServletException {

        List<TApplicant> applicantList = applicantRepo.findAll();

        return applicantList;
    }
}

Now I should be able to just Autowire Applicant and be able to access, however in this case it is not working when I call it in my @RestController:

@RestController
public class RequestController extends LoggingAware {

    private Applicant applicant;

    @Autowired
    public void setApplicant(Applicant applicant){
        this.applicant = applicant;
    }

    @RequestMapping(value="/", method = RequestMethod.GET)
    public String helloWorld() {

        try {
            List<TApplicant> applicantList = applicant.getAllApplicants();

            for (TApplicant tApplicant : applicantList){
                System.out.println("Name: "+tApplicant.getIndivName()+" SSN "+tApplicant.getIndSsn());
            }

            return "home";
        }
        catch (ServletException e) {
            e.printStackTrace();
        }

        return "error";
    }

}

————————UPDATE 1———————–

I added

@SpringBootApplication
@ComponentScan("module-service")
public class WebServiceApplication extends SpringBootServletInitializer {

    @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(WebServiceApplication.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(WebServiceApplication.class, args);
    }

}

and the error went away but nothing happened. However when I commented out everything dealing with Applicant in the RestController prior to adding @ComponentScan() I was able to return a string the UI, thus meaning my RestController was working, now it is being skipped. I ugly Whitelabel Error Page now.

———————UPDATE 2——————————

I added the base package of the bean it was complaining about. Error reads:

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method setApplicantRepo in com.service.applicant.ApplicantImpl required a bean of type 'com.delivery.service.request.repository.TApplicantRepository' that could not be found.


Action:

Consider defining a bean of type 'com.delivery.request.request.repository.TApplicantRepository' in your configuration.

I added @ComponentScan

@SpringBootApplication
@ComponentScan({"com.delivery.service","com.delivery.request"})
public class WebServiceApplication extends SpringBootServletInitializer {

    @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(WebServiceApplication.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(WebServiceApplication.class, args);
    }

}

—————————-Update 3———————-

adding:

@SpringBootApplication
@ComponentScan("com")
public class WebServiceApplication extends SpringBootServletInitializer {

still is complaining about my ApplicantImpl class which @Autowires my repo TApplicantRepository into it.

Answer

It might be because the project has been broken down into different modules.

@SpringBootApplication
@ComponentScan({"com.delivery.request"})
@EntityScan("com.delivery.domain")
@EnableJpaRepositories("com.delivery.repository")
public class WebServiceApplication extends SpringBootServletInitializer {