@PostMapping("/members/new") public String create(@Valid @ModelAttribute MemberForm form, BindingResult result) { if (result.hasErrors()) { return "members/createMemberForm"; } Address address = new Address(form.getCity(), form.getStreet(), form.getZipcode()); Member member = new Member(); member.setName(form.getName()); member.setAddress(address); memberService.join(member); return "redirect:/"; } @GetMapping("/members/new") public String createForm(Model model) { return "members/createMemberForm"; } 이런식으로 @ModelAttribute를 사용하여 코드를 짜보려고 하니 에러가 나왔고, 아마 html에서 memberForm 객체가 없어서 이용하지 못했고, 결국 매핑에 문제가 생겨 출력(?)을 하지 못해서 그런 것 같은데 예전 스프링 MVC강의에서는 @ModelAttriute를 이용해 코드를 잘 작성했던 거 같은데 왜 이번 강의에서는 사용하지 않았는지 궁금합니다. @PostMapping("/members/new") public String create(@Valid MemberForm form, BindingResult result) { MemberForm이 어떻게 파라미터로 받을 수 있는지 궁금합니다. (이미 Model에 객체가 있으면 파라미터로 받듯이 받을 수 있는 건지?) 위의 코드를 이용해서 웹페이지를 만드려면 createMemberForm.html 에서 <form role="form" action="/members/new" th:object="${memberForm}" method="post"> 이부분 대신 html 파라미터를 넘겨주는 식으로 고쳐야하는 것 일까요? html을 잘 몰라 질문드립니다.
ItemService에서는 ItemRepository의 기능을 위임받아 저장 및 검색 기능을 구현했는데 OrderService에서는 검색기능을 구현하지 않았더라구요. ItemService에서 위임 받는 것 처럼 하면 간단할 것 같은데 굳이 만들지 않고 OrderRepository의 findOne기능을 사용하는 이유가 따로 있는 것일까요?
eureka.clinet.fetch-registry : true 의미가 클라이언트가 유레카 서버를 통해 다른 서비스 정보를 얻기을 수 있다고 알고있습니다. 여기서 궁금한 점이 있는데 인스턴스가 다른 인스턴스의 정보가 필요한 이유가 자신이 받은 요청이 다른 인스턴스의 서비스가 필요할 떄가 있어서 그런 건가요??
main/resources/application.yml 을 따라가게 되는 건가요 ? 자바에서는 디비를 사용하고 싶고, test에서만 메모리 DB를 사용하고 싶다면 아무런 내용이 없는 application.yml를 test/resources 아래 생성만 하면 되는 건가요 ?
안녕하세요. 저같은사람이 없기를 바라며 오류 해결법을 올립니다... 환경은 23년 기준 스프링부트. 스프링클라우드 모두 최신버전입니다. (대신 강의처럼 maven이 아닌 gradle입니다) 23년 4월중순부터 강의를 잘 따라하다가 빌드후 실행하면 user-service에서 에러가 나는겁니다. openfeign 관련 에러였습니다. org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'rabbitConnectionFactory': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.context.event.AbstractApplicationEventMulticaster.retrieveApplicationListeners(AbstractApplicationEventMulticaster.java:264) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.event.AbstractApplicationEventMulticaster.getApplicationListeners(AbstractApplicationEventMulticaster.java:221) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:413) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:419) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:370) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1036) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1003) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.cloud.context.named.NamedContextFactory.destroy(NamedContextFactory.java:113) ~[spring-cloud-context-4.0.1.jar:4.0.1] at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:200) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:587) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:559) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1177) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:520) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1170) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1084) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:597) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[spring-boot-3.0.4.jar:3.0.4] at com.example.userservice.UserServiceApplication.main(UserServiceApplication.java:20) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-3.0.4.jar:3.0.4] 2023-04-24T23:38:38.274+09:00 INFO 14780 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' 2023-04-24T23:38:38.274+09:00 INFO 14780 --- [ restartedMain] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down' 2023-04-24T23:38:38.480+09:00 WARN 14780 --- [ restartedMain] o.s.b.f.support.DisposableBeanAdapter : Invocation of destroy method failed on bean with name 'inMemoryDatabaseShutdownExecutor': org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database is already closed (to disable automatic closing at VM shutdown, add ";DB_CLOSE_ON_EXIT=FALSE" to the db URL) [90121-214] 2023-04-24T23:38:38.481+09:00 INFO 14780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... 2023-04-24T23:38:38.484+09:00 INFO 14780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. 2023-04-24T23:38:38.486+09:00 INFO 14780 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2023-04-24T23:38:38.509+09:00 INFO 14780 --- [ restartedMain] .s.b.a.l.ConditionEvaluationReportLogger : Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled. 2023-04-24T23:38:38.534+09:00 ERROR 14780 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController' defined in file [E:\study\1.Web\2.BackEnd\MSA\user-service\out\production\classes\com\example\userservice\controller\UserController.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'orderServiceClient': Error creating bean with name 'com.example.userservice.client.OrderServiceClient': FactoryBean threw exception on object creation at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:245) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1344) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1188) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:961) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584) ~[spring-context-6.0.6.jar:6.0.6] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[spring-boot-3.0.4.jar:3.0.4] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[spring-boot-3.0.4.jar:3.0.4] at com.example.userservice.UserServiceApplication.main(UserServiceApplication.java:20) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-3.0.4.jar:3.0.4] Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'orderServiceClient': Error creating bean with name 'com.example.userservice.client.OrderServiceClient': FactoryBean threw exception on object creation at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:712) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:692) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:133) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:481) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1408) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:598) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1405) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-6.0.6.jar:6.0.6] ... 24 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.example.userservice.client.OrderServiceClient': FactoryBean threw exception on object creation at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:154) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:90) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1823) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1265) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:259) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1628) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1585) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1368) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325) ~[spring-beans-6.0.6.jar:6.0.6] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:709) ~[spring-beans-6.0.6.jar:6.0.6] ... 39 common frames omitted Caused by: java.lang.IllegalStateException: PathVariable annotation was empty on param 0. at feign.Util.checkState(Util.java:136) ~[feign-core-12.1.jar:na] at org.springframework.cloud.openfeign.annotation.PathVariableParameterProcessor.processArgument(PathVariableParameterProcessor.java:52) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at org.springframework.cloud.openfeign.support.SpringMvcContract.processAnnotationsOnParameter(SpringMvcContract.java:280) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:126) ~[feign-core-12.1.jar:na] at org.springframework.cloud.openfeign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:193) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:65) ~[feign-core-12.1.jar:na] at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:142) ~[feign-core-12.1.jar:na] at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:58) ~[feign-core-12.1.jar:na] at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:50) ~[feign-core-12.1.jar:na] at feign.Feign$Builder.target(Feign.java:197) ~[feign-core-12.1.jar:na] at org.springframework.cloud.openfeign.DefaultTargeter.target(DefaultTargeter.java:30) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at org.springframework.cloud.openfeign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:398) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at org.springframework.cloud.openfeign.FeignClientFactoryBean.getTarget(FeignClientFactoryBean.java:446) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at org.springframework.cloud.openfeign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:421) ~[spring-cloud-openfeign-core-4.0.1.jar:4.0.1] at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:148) ~[spring-beans-6.0.6.jar:6.0.6] ... 50 common frames omitted Process finished with exit code 0 에러는 다음과 같구요... Error creating bean with name 'rabbitConnectionFactory'를 아무리 검색해도 답이 안나오길래 중간에 PathVariable annotation was empty on param 0.를 검색해서 OrderSerivceClient 인터페이스에서 getOrders 함수의 @PathVariable에 value를 써주니까 에러가 사라졌습니다!! 뭔가 lib파일이 업데이트 됐다봅니다... before @GetMapping("/order-service/{userId}/orders") List<ResponseOrder> getOrders(@PathVariable String userId); after @GetMapping("/order-service/{userId}/orders") List<ResponseOrder> getOrders(@PathVariable(value = "userId") String userId); 세시간동안 gradle로 초기화해보고 별짓 다해보다 포기하려던 찰나에 해결했습니다. 저같은분은 없기를 바라겠습니다... 블로그 참조 https://lemontia.tistory.com/1046 혹시 다른방식으로 해결하신분 답변 부탁드립니다!
Users Microservice - JPA 수강중입니다. 실습 따라서 작성하고 있는데 오류가 나는데 잘 모르겠습니다. UserServiceImpl 에서 ModelMapper mapper = new ModelMapper(); mapper.getConfiguration().setMatchingStrategy(MatchingStrategies. STRICT ); UserEntity userEntity = mapper.map (userDto, UserEntity.class); userEntity.setEncryptedPwd("encrypted_password"); 여기까지 값이 잘 찍히다가 userRepository.save (userEntity); <-- 여기서 오류가 납니다. 2023-04-24T21:55:59.923+09:00 ERROR 3608 --- [o-auto-1-exec-6] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.NullPointerException: Cannot invoke " com.example.userservice.jpa.UserRepository.save (Object)" because "this.userRepository" is null] with root cause java.lang.NullPointerException: Cannot invoke " com.example.userservice.jpa.UserRepository.save (Object)" because "this.userRepository" is null at com.example.userservice.service.UserServiceImpl.createUser( UserServiceImpl.java:32 ) ~[classes/:na] at com.example.userservice.controller.UserController.createUser( UserController.java:45 ) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:77 ) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) ~[na:na] at java.base/java.lang.reflect.Method.invoke( Method.java:568 ) ~[na:na] at org.springframework.web.method.support .InvocableHandlerMethod.doInvoke( InvocableHandlerMethod.java:207 ) ~[spring-web-6.0.7.jar:6.0.7] at org.springframework.web.method.support .InvocableHandlerMethod.invokeForRequest( InvocableHandlerMethod.java:152 ) ~[spring-web-6.0.7.jar:6.0.7] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle( ServletInvocableHandlerMethod.java:118 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod( RequestMappingHandlerAdapter.java:884 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal( RequestMappingHandlerAdapter.java:797 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle( AbstractHandlerMethodAdapter.java:87 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.DispatcherServlet.doDispatch( DispatcherServlet.java:1081 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.DispatcherServlet.doService( DispatcherServlet.java:974 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.FrameworkServlet.processRequest( FrameworkServlet.java:1011 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at org.springframework.web.servlet.FrameworkServlet.doPost( FrameworkServlet.java:914 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at jakarta.servlet.http.HttpServlet.service( HttpServlet.java:563 ) ~[tomcat-embed-core-10.1.7.jar:6.0] at org.springframework.web.servlet.FrameworkServlet.service( FrameworkServlet.java:885 ) ~[spring-webmvc-6.0.7.jar:6.0.7] at jakarta.servlet.http.HttpServlet.service( HttpServlet.java:631 ) ~[tomcat-embed-core-10.1.7.jar:6.0] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:205 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.websocket.server.WsFilter.doFilter( WsFilter.java:53 ) ~[tomcat-embed-websocket-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.springframework.web.filter.RequestContextFilter.doFilterInternal( RequestContextFilter.java:100 ) ~[spring-web-6.0.7.jar:6.0.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.7.jar:6.0.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.springframework.web.filter.FormContentFilter.doFilterInternal( FormContentFilter.java:93 ) ~[spring-web-6.0.7.jar:6.0.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.7.jar:6.0.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal( CharacterEncodingFilter.java:201 ) ~[spring-web-6.0.7.jar:6.0.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.7.jar:6.0.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.StandardWrapperValve.invoke( StandardWrapperValve.java:166 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.StandardContextValve.invoke( StandardContextValve.java:90 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.authenticator.AuthenticatorBase.invoke( AuthenticatorBase.java:493 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:115 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.valves.ErrorReportValve.invoke( ErrorReportValve.java:93 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.core.StandardEngineValve.invoke( StandardEngineValve.java:74 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.catalina.connector.CoyoteAdapter.service( CoyoteAdapter.java:341 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.coyote.http11.Http11Processor.service( Http11Processor.java:390 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.coyote.AbstractProcessorLight.process( AbstractProcessorLight.java:63 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process( AbstractProtocol.java:894 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.util.net .NioEndpoint$SocketProcessor.doRun( NioEndpoint.java:1741 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.util.net.SocketProcessorBase.run ( SocketProcessorBase.java:52 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker( ThreadPoolExecutor.java:1191 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run( ThreadPoolExecutor.java:659 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run( TaskThread.java:61 ) ~[tomcat-embed-core-10.1.7.jar:10.1.7] at java.base/java.lang.Thread.run( Thread.java:833 ) ~[na:na]
//==연관관계 메서드==// 가 주석으로 달린 메서드들이 연관관계에 있는 객체에 값을 넣어줄 때 반대편에도 자동으로 값을 넣어주는 역할을 하는 메서드가 맞나요? 이렇게 따로 메서드를 구현해주는 이유가 있나요? CASCADE 옵션을 사용하면 어차피 알아서 다 해주지 않나요 ?? 기본편에서 설명해주셨다고 했는데 어떤 강의를 다시 수강해보면 될까요 ? 지연로딩에서 ***ToMany의 디폴트는 Lazy고, ***ToOne의 디폴트는 Eager인 이유가 ***ToMany같은 경우 하나만 불러와도 기본적으로 수많은 값이 따라오기 때문에 스프링 측에서 Lazy로 해놓았고, (Member의 Order을 조회하면 수많은 Order이 자동으로 따라오기 때문에 디폴트가 Lazy) ***ToOne의 경우 객체 하나만 조회하면 쿼리문을 하나밖에 더 날리지 않기 때문에 Eager로 해놓았지만, 실무에서는 테이블 전체를 조회할 때가 있기 때문에 디폴트값인 Eager를 쓰지 않고 Lazy를 사용한다 이게 맞을까요? (Order하나만 조회하면 Member 1개만 따라오기때문에 디폴트가 Eager지만, select o from Order o 와 같은 쿼리문으로 Order를 전체 조회했을 때는 Order에 따른 멤버가 전부 따라오므로 그냥 Lazy 옵션을 준다) 이렇게 이해했는데 맞을까요?
기본편에서 관계에 따른 연관관계 설정하는 방법은 공부했는데, 위와 같은 기능 목록을 보고 기능목록을 보고 위와 같이 어떤 도메인을 써야 할지, 도메인끼리 1:N인지, N:N인지, 1:1인지 단방향인지, 양방향인지(실무에서는 N:N과 양방향은 지양하라고 하셨지만) 등 도메인 모델과 테이블 설계가 어렵다면 무엇을 참고하는 것이 좋을까요 ? ( 영한님이 분석해 놓은 회원 엔티티와 회원 테이블을 보고 코드를 작성할 순 있는데 스스로 회원 엔티티와 테이블을 분석하기가 너무 어렵습니다.) Category 클래스 안에서 스스로 일대다 관계를 맺고 있는데 이것은 무엇을 위해 만든건가요 ?
터미널에서 9003 포트 실행할 때, 9001 포트가 중복된다고 발생하는 경우는 명령어가 잘못되서 그렇습니다. 강의랑 조금 다르네요 ' ' 해당 부분을 확인해주세요. mvn spring-boot:run '- Dspring-boot.run .jvmArguments=-Dserver.port=9003'
3:58초 경에 findMember.setAge(20)으로 결과가 바뀌면 영속성 컨텍스트에 관리가 되는 거고, 안바뀌면 관리가 되지 않는다라는데 이유가 뭔가요 ? JPA가 DB의 데이터에 접근하고 수정하고 작성,삭제 할 수 있다 = 영속성 컨텍스트가 관리한다 같은 말일까요 ?
@OneToMany @JoinColumn(name = "MEMBER_ID") private Order order; @OneToMany @JoinColumn(name = "MEMBER_ID") private List<Order> orders; 두개가 무슨 차이가 있는지 궁금합니다. 일대다 관계라면 컬렉션을 안써도 되지 않나요?
public static void main(String[] args) { Integer a = Integer.valueOf(10); Integer b = a; a = 20; System.out.println("a = " + a); System.out.println("b = " + b); } =======출력값 ======== a = 20 b = 10 이렇게 하면 값이 변경되는데 PPT에서 변경X라는 말이 무슨 말일까요 ?
Member와 Team을 예로 생각했을 때 즉시로딩 -> Member만 필요해도 Team과 쿼리문이 같이 나감 지연로딩 -> Member만 불러오고, Team은 프록시 객체로 불러와서, Team이 필요할 때 영속성 컨텍스트에 연결을 요청하고 요청 쿼리문이 나가는 것이 맞나요 ? Member.getTeam().getName()을 1번 수행한다고 했을 때 즉시로딩 (Member + Team 쿼리문 같이)의 성능이 지연로딩 ( Member 쿼리문 따로, Team 쿼리문 따로)보다는 좋지만 강의에서 나온 여러가지 문제로 웬만해서는 지연로딩을 사용하는 것이 더 좋다. 이것이 맞나요?
<BookForm> @Getter @Setter public class BookForm { private Long id; private String name; private int price; private int stockQuantity; private String author; private String isbn; } <Controller> @PostMapping("/items/new") public String create(BookForm form){ Book book = new Book(); book.setName(form.getName()); book.setPrice(form.getPrice()); book.setStockQuantity(form.getStockQuantity()); book.setAuthor(form.getAuthor()); book.setIsbn(form.getIsbn()); itemService.saveItem(book); return "redirect:/"; } <Service> @Service @RequiredArgsConstructor @Transactional(readOnly = true) public class ItemService { private final ItemRepository itemRepository; public void saveItem(Item item){ itemRepository.save(item); } public Item findOne(Long itemId){ return itemRepository.findOne(itemId); } public List<Item> findAll(){ return itemRepository.findAll(); } } <Repository> @Repository @RequiredArgsConstructor @Slf4j public class ItemRepository { private final EntityManager em; public void save(Item item){ if(item.getId() == null){ log.info("item={}", item); em.persist(item); //신규등록 }else{ em.merge(item); } } public Item findOne(Long id){ return em.find(Item.class, id); } public List<Item> findAll(){ return em.createQuery("select i from Item i", Item.class) .getResultList(); } } <Log> 2023-04-21 15:08:16.380 INFO 7536 --- [nio-8080-exec-2] j.jpashop2.repository.ItemRepository : item=Book(author=qwe, isbn=1234) <Test> 로그에 찍히는거 보면 값이 다 전달이 되고 테스트 코드에서도 성공으로 떠서 저장이 되야 될거 같은데 h2 db에 가면 값이 저장이 안되어 있네요 아예 디비랑 연동이 안되나 싶었는데 멤버는 정상적으로 회원가입이 되는데 아이템만 저장이 안되네요 뭐가 문제일까요... ddl-auto 는 create로 되어있구요 h2 db 버전은 1.4.2 입니다
ORDERS와 ORDER_ITEM의 관계는 하나의 주문 안에, 주문된 여러가지 아이템(book,album,movie등)이 있을 수 있기 때문에 1:N인 것 이 맞나요 ? OrderItem과 Item의 관계가 잘 이해 가지 않아서 찾아보다가 https://www.inflearn.com/course/lecture?courseSlug=ORM-JPA-Basic&unitId=21699&category=questionDetail&tab=community&q=805804 이 답변을 보고 헷갈리는 부분이 있는데요. Book을 n번 주문할 수 있기 때문에 1:N이라고 하셨는데 이 말은 즉, Book이라는 아이템 안에서도 주문된 여러가지 책(일본 책, 독일 책, 한국책) 이 있을 수 있기 때문에 1:N이라는 말일까요? 어떤 Member가 어떤 주문을 했는지 Order를 참고하는 것과 어떤 Order가 무엇을 구매했는지 Order_Item을 참고하는 것이 같은 맥락이라고 생각하는데 전자는 잘못된 설계고 후자는 괜찮은 설계인 이유는 무엇일까요?
public class Team2 { @Id @GeneratedValue @Column(name = "TEAM_ID") private int id; private String name; @OneToMany @JoinColumn(name = "MEMBER_ID") private List<Member> members = new ArrayList<>(); } public class Member2 { @Id @GeneratedValue() private Long id; @Column(name = "name") private String username; @ManyToOne(mappedBy = "members") private Team team; } 강의를 듣다가 외래키를 Team에 두면 안되는 것인가? 하고 혼자 코드를 작성해보았는데요. @ManyToOne은 mappedBy옵션을 지원하지 않는 걸로 봐서 1:N에서 N쪽이 외래키가 있어야하고, 연관관계의 주인이 되어야하는 것 같은데 연관관계의 주인이 되는 외래키는 어떤 방식으로 설정해주나요 ?
안녕하세요 선생님 다름이 아니라 제가 작성한 코드가 정답처리가 되었는데 이 코드는 정답이 되면 안되는 코드가 아닌가 해서 여쭤보고 싶어서 질문글 남깁니다. 예를들면 첫번째 문제에서는 CBA 순서로 무조건 짜야하지만 제 코드에서 str1 은 꼭 순서를 지켜야 하는 값이고 str2는 C의 순서를 알 수 없는데 정답처리가 되어서 제가 작성한 코드가 제대로 정답이 맞는건지 궁금해서 질문글을 남깁니다!
