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javaspringannotationsjavabeans

How are beans named by default when created with annotation?

I am working with Spring java code written by someone else. I want to reference a bean that's created by annotation (of field classABC):

@Component
public class ClassService
{
    @Autowired
    ClassABC classABC;

public interface ClassABC

@Repository
public class ClassABCImpl extends BaseABC implements ClassABC

The following code tries to get a reference to the ClassABC bean by name, but does not work:

ClassABC classABC = ApplicationContext.getBean("classABC");

However, the following code that references this bean by type does work:

ClassABC classABC = ApplicationContext.getBean(ClassABC.class);

Because the first reference does not work, I am guessing that the bean is not named "classABC". What is the name of this bean?

Note: there is no configuration xml that references this bean, so I don't think the bean name is defined in xml.

Solution

  • https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/context/annotation/AnnotationBeanNameGenerator.html

    Is the default bean name generator for annotations, there's a DefaultBeanNameGenerator for beans defined by @Bean

    In this case I believe the name of the bean would be classABCImpl, as its built of the short name of the class.

    From the example of a concrete service implementation, com.xyz.FooServiceImpl -> fooServiceImpl

    Personally I'm not a fan of using the default naming if you are ever going to want to refer to that bean via the name. Better to be explicit in these cases.