오류 해결 - 순환참조 The dependencies of some of the beans in the application context form a cycle

순환 참조 오류

The dependencies of some of the beans in the application context form a cycle:

2023-01-11 17:23:41.435 ERROR 10128 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌─────┐
|  securityConfig (field private com.jig.security1.oauth.PrincipalOauth2UserService com.jig.security1.config.SecurityConfig.principalOauth2UserService)
↑     ↓
|  principalOauth2UserService (field private org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder com.jig.security1.oauth.PrincipalOauth2UserService.bCryptPasswordEncoder)
└─────┘


Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

 

[사유]

SecurityConfig에서 BCryptPasswordEncoder 빈 생성, PrincipalOauth2UserService를 참조함.

 

PrincipalOauth2UserService에서 BCryptPasswordEncoder 빈 @Autowired로 주입 받을 때 BCryptPasswordEncoder 가 생성된 SecurityConfig를 참조함.

 

결과적으로 SecurityConfig가 PrincipalOauth2UserService를 참조하고 PrincipalOauth2UserService에서도 SecurityConfig를 참조

 

[해결법 ]

BCryptPasswordEncoder 빈 생성을 다른 곳에서 하면 됨.

저는 BCryptPasswordEncoder 빈 생성을 목적으로 하는 config 클래스 추가로 만듬.

 

 

문제 코드

@Configuration
@EnableWebSecurity  // 스프링 시큐리티 필터가 스프링 필터체인에 등록됩니다.
@EnableGlobalMethodSecurity(securedEnabled = true, prePostEnabled = true) // securedEnabled = true -> @Secured 어노테이션 활성화 // prePostEnabled = true -> @PreAuthorize, @PostAuthorize 어노테이션 활성화
public class SecurityConfig  extends WebSecurityConfigurerAdapter {
    @Bean
    public BCryptPasswordEncoder encoder() {
        return new BCryptPasswordEncoder();
    }
}

@Service
public class PrincipalOauth2UserService extends DefaultOAuth2UserService {

    @Autowired
    private BCryptPasswordEncoder bCryptPasswordEncoder;

 

 

해결 코드

@Configuration
@EnableWebSecurity  // 스프링 시큐리티 필터가 스프링 필터체인에 등록됩니다.
@EnableGlobalMethodSecurity(securedEnabled = true, prePostEnabled = true) // securedEnabled = true -> @Secured 어노테이션 활성화 // prePostEnabled = true -> @PreAuthorize, @PostAuthorize 어노테이션 활성화
public class SecurityConfig  extends WebSecurityConfigurerAdapter {
/*    
    @Bean
    public BCryptPasswordEncoder encoder() {
        return new BCryptPasswordEncoder();
    }*/

}

@Configuration
public class PwdConfig {
    @Bean
    public BCryptPasswordEncoder encoder() {
        return new BCryptPasswordEncoder();
    }
}