Autodetection fail

Hi everybody,
it's the first I'm trying to use bean autodetection and I'm having some problem.
I'm trying to autodetect a class from an external JAR and then inject it into a controller with the @Autowired annotation.
Here is some code.

This is the class that should be autodetected

Code:

---

@Component
public abstract class LanguageDao extends JpaCrudRepository<Language, Long>
                implements JpaRepository<Language, Long> {

}

---

The controller

Code:

---

@RequestMapping("/test/**")
@Controller
public class TestController {

        @Autowired(required = true)
        private LanguageDao languageDao;

        public LanguageDao getLanguageDao() {
                return languageDao;
        }

        public void setLanguageDao(LanguageDao languageDao) {
                this.languageDao = languageDao;
        }

        @RequestMapping(method = RequestMethod.POST, value = "{id}")
        public void post(@PathVariable Long id, ModelMap modelMap,
                        HttpServletRequest request, HttpServletResponse response) {
        }

        @RequestMapping
        public String index() {
                return "test/index";
        }
}

---

And the configuration to enable component scanning

HTML Code:

---

    <context:component-scan base-package="test.project">
        <context:exclude-filter expression=".*_Roo_.*" type="regex"/>
        <context:exclude-filter expression="org.springframework.stereotype.Controller" type="annotation"/>
    </context:component-scan>
    <context:component-scan base-package="test.external"></context:component-scan>

---

As result I'm receiving the message

Code:

---

GRAVE: Servlet /cmcloud threw load() exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [test.external.LanguageDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

---

What am I doing wrong?
Thanks,
Stefano

Quote:

---

This is the class that should be autodetected

---

No itsn't... It is abstract an abstract class cannot be instantiated so basically your @Component is useless.

Judging by the classes/interfaces you are using Spring DATA I suggest a read of the reference guide of the Spring Data Jpa project.

Thanks Marten.
Tha 'abstract' was only here, not in the code... Sorry.
However, once I renamed the classes according to Spring data conventions it worked.

Thanks again,
Stefano