CODEWITHSUNDEEP
javaspringautowired
Salman Kazmi
Salman Kazmi

Reputation: 3248

Unsatisfied dependency exception when wiring interface in spring

I have the following classes and interfaces in my spring webapp and I am trying to autowire them. Spring complains with the following exception:

Error creating bean with name 'employeeServiceImpl': Unsatisfied 
dependency expressed through field 'employeeRepository'; nested exception 
is org.springframework.beans.factory.NoSuchBeanDefinitionException: No 
qualifying bean of type 'com.xyz.repository.EmployeeRepository' 
available: expected at least 1 bean which qualifies as autowire candidate. 
Dependency annotations: 
{@org.springframework.beans.factory.annotation.Autowired(required=true)}

EmployeeController class

@RestController
@RequestMapping("/employee")
public class EmployeeController{
    @Autowired
    EmployeeService employeeService;
}

EmployeeService Interface

public interface EmployeeService {

}

EmployeeServiceImpl class

@Service
public class EmployeeServiceImpl implements EmployeeService{
    @Autowired
    EmployeeRepository employeeRepository;  
}

EmployeeRepository interface

@Repository
public interface EmployeeRepository extends EmployeeRepositoryCustom, JpaRepository<Employee, String>, JpaSpecificationExecutor<Employee>{

}

EmployeeRepositoryCustom interface

@Repository
public interface EmployeeRepositoryCustom {

}

EmployeeRepositoryImpl class

@Component
public class EmployeeRepositoryImpl implements EmployeeRepositoryCustom{
    @PersistenceContext
    EntityManager em;

}

The config classes look like below:

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "com.xyz" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {

}

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[] {SpringConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[] {WebMvcConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

    @Override
    protected void registerDispatcherServlet(ServletContext servletContext) {
        super.registerDispatcherServlet(servletContext);

        servletContext.addListener(new HttpSessionEventPublisher());
    }

}

SpringConfig class

    @Configuration
    @Import(value = {DataSourceConfig.class, WebMvcConfig.class, RepositoryConfig.class})
    @ComponentScan(basePackages = "com.xyz", 
        [email protected](value = Configuration.class, type= FilterType.ANNOTATION))
    @EnableSpringConfigured
    public class SpringConfig {
        @Autowired
        Environment env;

    }

I'm not able to figure out what's wrong in autowiring. Any help would be appreciated. Thanks.

Upvotes: 1

Views: 1274

Answers (1)

M. Deinum
M. Deinum

Reputation: 124526

@Repository
public interface EmployeeRepository extends EmployeeRepositoryCustom, JpaRepository<Employee, String>, JpaSpecificationExecutor<Employee>{

}

Judging from the above repository definition I suspect you are trying to use [Spring Data JPA]. However only extending a Spring Data interface isn't enough you also need to enable it with the @EnableJpaRepository annotation. Put that on your @Configuration class.

@Configuration
@EnableWebMvc
@EnableJpaRepositories("your-base-package-here")
@ComponentScan(basePackages = { "com.xyz" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {

}

Upvotes: 1

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