UnsatisfiedDependency

expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
발생 시 해결 방법

 

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[Error 로그]

Parameter 2 of constructor in us.puter.park.api.MenuController required a bean of type 'us.puter.park.common.security.auth.UrlFilterInvocationSecurityMetadataSource' that could not be found.

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'menuController' defined in file [D:\workspace\park\build\classes\java\main\us\puter\park\api\MenuController.class]: 
Unsatisfied dependency expressed through constructor parameter 2; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: 
No qualifying bean of type 'us.puter.park.common.security.auth.UrlFilterInvocationSecurityMetadataSource' available: 
expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: 
No qualifying bean of type 'us.puter.park.common.security.auth.UrlFilterInvocationSecurityMetadataSource' available: 
expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

 

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[현황]

 

1. 아래 코드에서 `UrlFilterInvocationSecurityMetadataSource`을 주입함

@RestController
@RequestMapping("/api/common/menu")
@RequiredArgsConstructor
public class MenuController {
    private final MenuService menuService;
    private final AuthService authService;
    private final UrlFilterInvocationSecurityMetadataSource urlFilterInvocationSecurityMetadataSource;
	...
}

 

2. `UrlFilterInvocationSecurityMetadataSource`은 `FilterInvocationSecurityMetadataSource` 상속 받으며, 어노테이션을 통한 주입을 하지 않음

public class UrlFilterInvocationSecurityMetadataSource implements FilterInvocationSecurityMetadataSource {
    private final LinkedHashMap<RequestMatcher, List<ConfigAttribute>> requestMap;
    private final AuthService authService;

    public UrlFilterInvocationSecurityMetadataSource(LinkedHashMap<RequestMatcher, List<ConfigAttribute>> requestMap,
                                                     AuthService authService) {
        this.requestMap = requestMap;
        this.authService = authService;
    }
    ...
}

 

3. `SecurityConfig`에서 `@Bean`을 통하여 주입함
> 문제는 `FilterInvocationSecurityMetadataSource` 자료형으로 주입함

@Bean
public FilterInvocationSecurityMetadataSource urlFilterInvocationSecurityMetadataSource() throws Exception {
    return new UrlFilterInvocationSecurityMetadataSource(urlResourcesMapFactoryBean().getObject(), authService);
}

private UrlResourcesMapFactoryBean urlResourcesMapFactoryBean() {
    UrlResourcesMapFactoryBean urlResourcesMapFactoryBean = new UrlResourcesMapFactoryBean();
    urlResourcesMapFactoryBean.setAuthService(authService);
    return urlResourcesMapFactoryBean;
}

 

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[해결]

`@Bean` 설정의 자료형을 `UrlFilterInvocationSecurityMetadataSource`로 변경

@Bean
public FilterInvocationSecurityMetadataSource urlFilterInvocationSecurityMetadataSource() throws Exception {
    return new UrlFilterInvocationSecurityMetadataSource(urlResourcesMapFactoryBean().getObject(), authService);
}

▼▼▼▼▼▼▼▼▼▼

@Bean
public UrlFilterInvocationSecurityMetadataSource urlFilterInvocationSecurityMetadataSource() throws Exception {
    return new UrlFilterInvocationSecurityMetadataSource(urlResourcesMapFactoryBean().getObject(), authService);
}

 

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• 해당 오류는 `@Autowired`로 선언된 객체인 `UrlFilterInvocationSecurityMetadataSource` 타입의 빈으로 생성된 객체가 하나도 존재하지 않아 발생함
• `@Bean`, `@Component`, `@Service`과 같은 어노테이션을 선언해서 해당 객체가 빈으로 생성되도록 하거나 스프링에서 지원하는 빈생성 클래스인 `FactoryBean`을 사용해서 빈으로 생성하는 로직을 구현해야 함
• 즉, `@Autowired`된 빈을 찾고 있는데 해당 객체가 빈으로 생성되도록 선언된 구문이 없기 때문에 발생하는 오류