Spring Boot MVC Converter не может Autowire Neo4J Data Repositories

Question

Мне нужно @Autowire репозиторий Spring Data Neo4J в Spring MVC-конвертер (в Spring Boot), но конфигурация MVC запускается до того, как начнутся службы данных. Это приводит к проблеме @Autowired, которая не найдена. Как получить службы данных для начала работы перед MVC, чтобы найти подходящий компонент?

У меня есть проект, который я конвертирую из конфигурации Spring Spring Spring в Spring Boot. Все работает отлично, за исключением MVC Converters. Они не могут использовать классы @Autowire Neo4J Repository.

Если вы удалите @Autowire репозитория и жесткий код в значении, все будет работать как ожидается при взломе. Другие операции в службах очень хорошо используют репозитории. Кажется, что конфигурация MVC начинает работу до того, как сантехника Neo4J может начать работу, а затем не сможет найти нужные компоненты для соединения. Я посмотрел, но я не могу понять, как заставить конфигурацию данных запускаться до конфигурации MVC.

Вот моя базовая конфигурация:

@Configuration 
@ComponentScan 
@EnableAutoConfiguration 
public class Toyfiles { 
    public static void main(String[] args) throws Exception { 
     SpringApplication.run(Toyfiles.class, args); 
    } 
} 

My MVC Config:

@Configuration 
public class MVCBeans extends WebMvcConfigurerAdapter { 
@Autowired 
private StringToBrand stringToBrand; 

@Autowired 
private BrandToString brandToString; 

@Override 
public void addFormatters(FormatterRegistry registry) { 
    registry.addConverter(stringToBrand); 
    registry.addConverter(brandToString); 
    super.addFormatters(registry); 
} 

}

Нарушитель Преобразователь:

@Component 
public class StringToBrand implements Converter<String, Brand> { 
    @Autowired 
    BrandRepository brandRepository; 

    @Override 
    public Brand convert(String s) { 
     return brandRepository.findBrandByName(s); 
    } 
} 

Конфигурационный данных:

@Configuration 
@Profile("localEmbeddedDBServer") 
@EnableTransactionManagement 
@EnableNeo4jRepositories(basePackages = "com.toyfiles.dataservices.") 
public class LocalDBConfig extends Neo4jConfiguration { 

    public LocalDBConfig() { 
     setBasePackage("com.toyfiles"); 
    } 

    @Bean 
    public GraphDatabaseService graphDatabaseService() { 
     return new GraphDatabaseFactory().newEmbeddedDatabase("target/graph.db"); 
    } 
} 

И Repository:

public interface BrandRepository extends GraphRepository<Brand> { 

    @Query(value = "MATCH (brand:Brand {name:{0}})-[:PART_OF]->line RETURN line") 
    public List<Line> getLinesForBrand(String name); 

    @Query(value = "MATCH (brand:Brand {name:{0}}) DELETE brand") 
    public void deleteBrandByName(String name); 

    public Brand findBrandByName(String name); 
} 

"интересная" часть Exception:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brandRepository': Cannot resolve reference to bean 'neo4jTemplate' while setting bean property 'neo4jTemplate'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jTemplate' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.data.neo4j.support.Neo4jTemplate org.springframework.data.neo4j.config.Neo4jConfiguration.neo4jTemplate() throws java.lang.Exception] threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jMappingContext' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d49af10: startup date [Mon Sep 29 09:48:25 PDT 2014]; root of context hierarchy 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:336) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1457) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1198) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1021) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:964) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:862) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:481) 
    ... 116 more 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jTemplate' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.data.neo4j.support.Neo4jTemplate org.springframework.data.neo4j.config.Neo4jConfiguration.neo4jTemplate() throws java.lang.Exception] threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jMappingContext' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d49af10: startup date [Mon Sep 29 09:48:25 PDT 2014]; root of context hierarchy 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:597) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328) 
    ... 129 more 
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.data.neo4j.support.Neo4jTemplate org.springframework.data.neo4j.config.Neo4jConfiguration.neo4jTemplate() throws java.lang.Exception] threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jMappingContext' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d49af10: startup date [Mon Sep 29 09:48:25 PDT 2014]; root of context hierarchy 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188) 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:586) 
    ... 138 more 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jMappingContext' defined in class path resource [com/toyfiles/configuration/LocalDBConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d49af10: startup date [Mon Sep 29 09:48:25 PDT 2014]; root of context hierarchy 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1554) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:288) 
    at com.toyfiles.configuration.LocalDBConfig$$EnhancerBySpringCGLIB$$321222c6.mappingInfrastructure(<generated>) 
    at org.springframework.data.neo4j.config.Neo4jConfiguration.neo4jTemplate(Neo4jConfiguration.java:135) 
    at com.toyfiles.configuration.LocalDBConfig$$EnhancerBySpringCGLIB$$321222c6.CGLIB$neo4jTemplate$23(<generated>) 
    at com.toyfiles.configuration.LocalDBConfig$$EnhancerBySpringCGLIB$$321222c6$$FastClassBySpringCGLIB$$12e74a61.invoke(<generated>) 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:312) 
    at com.toyfiles.configuration.LocalDBConfig$$EnhancerBySpringCGLIB$$321222c6.neo4jTemplate(<generated>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166) 
    ... 139 more 
Caused by: java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d49af10: startup date [Mon Sep 29 09:48:25 PDT 2014]; root of context hierarchy 
    at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:346) 
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:333) 
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:307) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:69) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:49) 
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:181) 
    at org.springframework.data.neo4j.mapping.RelationshipInfo.<init>(RelationshipInfo.java:65) 
    at org.springframework.data.neo4j.mapping.RelationshipInfo.fromField(RelationshipInfo.java:79) 
    at org.springframework.data.neo4j.support.mapping.Neo4jPersistentPropertyImpl.extractRelationshipInfo(Neo4JPersistentPropertyImpl.java:128) 
    at org.springframework.data.neo4j.support.mapping.Neo4jPersistentPropertyImpl.<init>(Neo4JPersistentPropertyImpl.java:80) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.createPersistentProperty(Neo4jMappingContext.java:161) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.createPersistentProperty(Neo4jMappingContext.java:49) 
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:449) 
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:427) 
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:606) 
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:295) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:69) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:49) 
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:181) 
    at org.springframework.data.neo4j.mapping.RelationshipInfo.<init>(RelationshipInfo.java:65) 
    at org.springframework.data.neo4j.mapping.RelationshipInfo.fromField(RelationshipInfo.java:79) 
    at org.springframework.data.neo4j.support.mapping.Neo4jPersistentPropertyImpl.extractRelationshipInfo(Neo4JPersistentPropertyImpl.java:128) 
    at org.springframework.data.neo4j.support.mapping.Neo4jPersistentPropertyImpl.<init>(Neo4JPersistentPropertyImpl.java:80) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.createPersistentProperty(Neo4jMappingContext.java:161) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.createPersistentProperty(Neo4jMappingContext.java:49) 
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:449) 
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:427) 
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:606) 
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:295) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:69) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.addPersistentEntity(Neo4jMappingContext.java:49) 
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:257) 
    at org.springframework.data.mapping.context.AbstractMappingContext.initialize(AbstractMappingContext.java:373) 
    at org.springframework.data.neo4j.support.mapping.Neo4jMappingContext.initialize(Neo4jMappingContext.java:111) 
    at org.springframework.data.mapping.context.AbstractMappingContext.afterPropertiesSet(AbstractMappingContext.java:363) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1613) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1550) 
    ... 160 more 

Answer 1

Я использовал аннотацию @Lazy для хранилища, чтобы задержать ссылку на хранилище с момента репозиторий начал правильно запускаться позже при запуске. Это позволило отложить ссылку на репозиторий до тех пор, пока это не понадобится и не будет доступно.

@Autowired 
@Lazy 
BrandRepository brandRepository;