ApplicationListener <ContextRefreshedEvent>导致java.lang.Exception:异常,仅用于在Spring Boot应用程序中提供堆栈跟踪

我的最终目标很简单。我正在尝试在应用程序启动时在表中插入数据,数据格式为在Enum类中声明的一些变量的格式:

public enum UserRole {
    ADMIN,
    USER
}

and StartupScript class which implements ApplicationListener<ContextRefreshedEvent> is as simple as:

@Component
public class StartupScript implements ApplicationListener<ContextRefreshedEvent> {

    private final RoleService roleService;

    @Autowired
    public StartupScript(RoleService roleService) {
        this.roleService = roleService;
    }

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        // Check if there is no any entry of roles earlier
        if(roleService.findAll().isEmpty()){
            // Get all ENUMs from UserRole Class
            EnumSet.allOf(UserRole.class)
                    // Iterate over using forEach loop
                    .forEach(userRole -> {
                        // Create new Role Object
                        Role role = new Role();
                        // Set roleName by .name() method of ENUM
                        role.setRoleName(userRole.name());
                        // Finally Save
                        roleService.save(role);
                    });
        }
    }
}

它给了我这个堆栈跟踪:

java.lang.Exception: exception just for purpose of providing stack trace
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.markRollbackOnly(JdbcResourceLocalTransactionCoordinatorImpl.java:266) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.engine.transaction.internal.TransactionImpl.setRollbackOnly(TransactionImpl.java:143) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.Transaction.markRollbackOnly(Transaction.java:68) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.internal.AbstractSharedSessionContract.markForRollbackOnly(AbstractSharedSessionContract.java:364) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:167) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:789) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:767) [hibernate-core-5.2.14.Final.jar:5.2.14.Final]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:304) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at com.sun.proxy.$Proxy123.persist(Unknown Source) [na:na]
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:490) [spring-data-jpa-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
    at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:377) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:629) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:593) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:578) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) [spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294) ~[spring-tx-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:135) ~[spring-data-jpa-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) ~[spring-data-commons-2.0.5.RELEASE.jar:2.0.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) [spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at com.sun.proxy.$Proxy126.save(Unknown Source) ~[na:na]
    at pk.inlab.web.app.resumehub.service.RoleService.save(RoleService.java:28) ~[classes/:na]
    at pk.inlab.web.app.resumehub.comp.StartupScript.lambda$onApplicationEvent$0(StartupScript.java:36) ~[classes/:na]
    at java.util.Arrays$ArrayList.forEach(Arrays.java:3880) ~[na:1.8.0_131]
    at pk.inlab.web.app.resumehub.comp.StartupScript.onApplicationEvent(StartupScript.java:30) ~[classes/:na]
    at pk.inlab.web.app.resumehub.comp.StartupScript.onApplicationEvent(StartupScript.java:14) ~[classes/:na]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:399) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:353) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:887) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at pk.inlab.web.app.resumehub.ResumeHubApplication.main(ResumeHubApplication.java:16) ~[classes/:na]

and the data is not inserted in DB table. My Question is how to make StartupScript work correctly and insert data in table without throwing exception mentioned above.