Spring Boot JPA with REST Service

Question

I know that such questions were asked (Did not find handler method ), but after trying multiple solutions I'm still stucked. So my problem is: I can't use both REST and JPA in my project. com.db.ruf: WRepository.class:

@NoRepositoryBean
@Component
public interface WRepository <T, ID extends Serializable>
        extends JpaRepository<T, ID> {
}

com.db.ruf: WRepositoryImpl.class:

public class WRepositoryImpl<T, ID extends Serializable>
        extends SimpleJpaRepository<T, ID> implements WRepository<T, ID> {

    private EntityManager entityManager;

    // There are two constructors to choose from, either can be used.
    public WRepositoryImpl(Class<T> domainClass, EntityManager entityManager) {
        super(domainClass, entityManager);

        // This is the recommended method for accessing inherited class dependencies.
        this.entityManager = entityManager;
    }
}

com.db: MyRepositoryFactoryBean.class

public class MyRepositoryFactoryBean <R extends JpaRepository<T, I>, T, I extends Serializable>
        extends JpaRepositoryFactoryBean<R, T, I> {
    /**
     * Creates a new {@link JpaRepositoryFactoryBean} for the given repository interface.
     *
     * @param repositoryInterface must not be {@literal null}.
     */
    public MyRepositoryFactoryBean(Class<? extends R> repositoryInterface) {
        super(repositoryInterface);
    }

    protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {

        return new MyRepositoryFactory(entityManager);
    }

    private static class MyRepositoryFactory<T, I extends Serializable> extends JpaRepositoryFactory {

        private EntityManager entityManager;

        public MyRepositoryFactory(EntityManager entityManager) {
            super(entityManager);

            this.entityManager = entityManager;
        }

        protected Object getTargetRepository(RepositoryMetadata metadata) {

            return new WRepositoryImpl<T, I>((Class<T>) metadata.getDomainType(), entityManager);
        }

        protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {

            // The RepositoryMetadata can be safely ignored, it is used by the JpaRepositoryFactory
            //to check for QueryDslJpaRepository's which is out of scope.
            return WRepository.class;
        }
    }
}

com.rest.: WebadminRESTController.class

@RestController
@Component

public class WebadminRESTController {

    @Autowired
   WRepository<ExternalLink, Long> wRepositoryImpl;

    @RequestMapping(value = "/allExternalLinks", method = RequestMethod.GET)
    public ResponseEntity<?> allExternalLinks() {
...
     }
}

com:

@SpringBootApplication
@EnableAutoConfiguration
@EnableJpaRepositories(basePackages = "com.db.ruf", repositoryFactoryBeanClass = MyRepositoryFactoryBean.class)
@ComponentScan(basePackages = "com", resourcePattern = "com.*")

@EntityScan({"com.db"})


public class WebadminApplication {

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

In this case I get:

Did not find handler method for [/allExternalLinks]

If I change @ComponentScan(basePackages = "com", resourcePattern = "com.*") to @ComponentScan(basePackages = "com") or @ComponentScan I get:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.db.ruf.WRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

I really don't know what's wrong. Could anyone be so kind to explain it? Thank you in advance

Vera, please explain, what exactly do you want to do? It is enough only 3 classes to work with data-jpa and data-jpa-rest... Did you read this [manual](https://spring.io/guides/gs/accessing-data-rest/)? — Cepr0, Jul 11 '17 at 17:18
The deal is that I have problem with a cache of entityManager. Whan I called "save" using simple "interface RepoName extends CrudRepository", I got incorrect data because the saving entity is additionally changed by db trigger. I need to call refresh or something like that.So according https://docs.spring.io/spring-data/jpa/docs/1.4.0.M1/reference/html/repositories.html I tried to implement methods above. — Vera Geraskina, Jul 12 '17 at 06:27
Я создал [чат](https://chat.stackoverflow.com/rooms/148969), можем пообщаться там... — Cepr0, Jul 12 '17 at 07:42
Мне очень жаль, но не выйдет: You must have 20 reputation on Stack Overflow to talk here. — Vera Geraskina, Jul 12 '17 at 09:36
How about here: https://gitter.im/stack-over-flow/SpringDataJPA-REST ? — Cepr0, Jul 12 '17 at 09:54

cuongnguyen · Answer 1 · 2017-07-12T09:05:47.360

0

Use @Repository on WRepositoryImpl.java. And edit WebadminRESTController.java:

@Autowired WRepositoryImpl<ExternalLink, Long> wRepositoryImpl;

edited Jul 12 '17 at 09:05

answered Jul 12 '17 at 03:44

cuongnguyen

96
5

When I do that I get: > org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.lang.Class>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {} – Vera Geraskina Jul 12 '17 at 06:17
Try `@Service` on your WRepositoryImpl class, and delete `@Component` from your interface. In your WebadminRESTController class, edit the specified line to `@Autowired WRepositoryImpl wRepositoryImpl;` – cuongnguyen Jul 12 '17 at 08:55
Sorry, try `@Repository` – cuongnguyen Jul 12 '17 at 09:02
> org.springframework.beans.factory.NoSuchBeanDefinitionExcept‌ion: No qualifying bean of type 'java.lang.Class>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {} .....( – Vera Geraskina Jul 12 '17 at 09:33

score 0 · Answer 2 · answered Jul 12 '17 at 12:28

Accidentally I found solution (don't think that it is the best one, but at least it works):

public interface  ExternalLinksRepo extends  CrudRepository<ExternalLink, Long> {
...
}

and:

public class WebadminRESTController {

   @Autowired
   ExternalLinksRepo wRepositoryImpl;
...}

Then wRepositoryImpl is automatically created as instance of WRepositoryImpl

Thanks to all, especially to Cepr0

Spring Boot JPA with REST Service

2 Answers2