我需要将Spring Data Neo4J存储库@Autowire转换为Spring MVC转换器（在Spring Boot中），但MVC配置在Data服务启动之前就已启动。这导致@Autowired未找到问题。 如何在MVC之前启动数据服务，以便找到符合条件的bean？
我有一个项目，我正在从XML Spring配置转换为Spring Boot。除MVC转换器外，一切正常。他们无法@Autowire Neo4J Repository类。
如果删除了存储库的@Autowire和值中的硬编码，那么hack会按预期工作。服务中的其他操作正在使用存储库。似乎MVC配置在Neo4J管道开始之前就开始了，然后无法找到合适的组件。我看了，但我无法弄清楚如何在MVC配置之前启动数据配置。
这是我的基本配置：
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Toyfiles {
public static void main(String[] args) throws Exception {
SpringApplication.run(Toyfiles.class, args);
}
}
我的MVC配置：
@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);
}
}
违规的转换器：
@Component
public class StringToBrand implements Converter<String, Brand> {
@Autowired
BrandRepository brandRepository;
@Override
public Brand convert(String s) {
return brandRepository.findBrandByName(s);
}
}
数据配置：
@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");
}
}
和存储库：
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);
}
例外的“有趣”部分：
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
答案 0 :(得分：3)
我在存储库中使用@Lazy注释来延迟对存储库的引用，因为存储库在启动后期正确启动。这允许将存储库引用延迟到需要和可用时为止。
@Autowired
@Lazy
BrandRepository brandRepository;