how to get the class annotation with @SpringBootApplication

Question

The spring searches components base for the class annotated with @SpringBootApplication , reference from Locating the Main Application Class . When I write my own component, I want to be able to use this path as well, but I don't know how to get it.

for example:

@SpringBootApplication
public class Application {

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

public static class SomeComponent {
    //I use this to scan my custom annotation
    private String basePackage;

    public SomeComponent(String basePackage) {
        this.basePackage = basePackage;
    }
}

@Configuration
public static class SomeComponentConfiguration {

    @Value("${spring.some-component.base-package:}")
    private String basePackage;

    @Bean
    public SomeComponent someComponent() {
        if (basePackage == null) {
            //TODO how to get the Application.class as default path commonly
            basePackage = Application.class.getPackage().getName();
        }
        return new SomeComponent(basePackage);
    }
}
}

Answer 1

I think this class does what you want:

@Service
public class ApplicationFinder {

  @Autowired private ApplicationContext context;

  public String findBootClass() {
    Map<String, Object> candidates = context.getBeansWithAnnotation(SpringBootApplication.class);
    return candidates.isEmpty() ? null : candidates.values().toArray()[0].getClass().getName();
  }
}