如何使用 spring-data-neo4j-cross-store 在 neo4j 和 postgres 之间的部分 NodeEntity 上支持跨存储持久性？
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【中文标题】如何使用 spring-data-neo4j-cross-store 在 neo4j 和 postgres 之间的部分 NodeEntity 上支持跨存储持久性？【英文标题】：How can I support cross-store persistence on a partial NodeEntity between neo4j and postgres with spring-data-neo4j-cross-store? 【发布时间】：2015-09-04 09:27:10 【问题描述】：我想在我的应用程序中同时使用 Postgres 和 Neo4j。我能够配置它们，但是，我很难持久化部分节点实体（跨存储持久性）。
鉴于以下配置和实体。似乎我能够将传统的 RDBMS JPA 实体持久化到 postgres 数据库和将 NodeEntity 持久化到 neo4j 数据库，但是，当尝试通过跨存储持久性将部分实体持久化到两者时，我得到了下面的堆栈跟踪。它抱怨 java.lang.ClassCastException 说我的 PartialEntity 不能转换为 NodeBacked。我相信它一定与跨商店配置有关，但我无法找到根本问题。
我在 github 上创建了一个示例项目来演示我面临的问题。请随时在这里查看https://github.com/StevenGall/***-question-spring-data-neo4j-cross-store
部分节点实体
@Entity
@Table(name = "partial_entity")
@NodeEntity(partial = true)
public class PartialEntity extends AbstractEntity
@GraphId Long graphId;
/**
* A free form text description.
*/
@Column(name = "description")
@Graphproperty
private String description;
/**
* The name given by the User
*/
@Column(name = "name", nullable = false)
@GraphProperty
private String name;
//getters and setters omitted
全节点实体
@NodeEntity
public class FullNodeEntity
@GraphId Long graphId;
/**
* A free form text description */
private String description;
/**
* The name given by the User
*/
private String name;
//getters and setters omitted
用户（一个 JPA 实体）
@Entity
@Table(name = "user_profile")
public class User extends AbstractEntity
private static final long serialVersionUID = 53887647670812546L;
/**
* The first name of the user.
*/
@Column(name = "first_name", nullable = false)
@NotEmpty
protected String firstName;
/**
* The last name of the user.
*/
@Column(name = "last_name", nullable = false)
@NotEmpty
protected String lastName;
/**
* The email address of the user. This is used as a username.
*/
@Column(name = "email", nullable = false, unique = true)
@NotEmpty
protected String email;
/**
* The role of the user.
*/
@Column(name = "role", nullable = false)
@Enumerated(EnumType.STRING)
@NotNull
protected Role role;
//getters and setters omitted
AbstractEntity（提供 id 和审计资料）
@EntityListeners(AuditingEntityListener.class)
@MappedSuperclass
public abstract class AbstractEntity
/**
* The class logger.
*/
private static final Logger LOG = LogManager.getLogger(AbstractEntity.class);
/**
* The entity id.
*/
@Column(name = "id")
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@JsonIgnore
@NotNull
private long id;
/**
* The date the entity was created.
*/
@CreatedDate
@Column(name = "created_date", updatable = false)
private Calendar createdDate;
/**
* The last time the entity was modified.
*/
@LastModifiedDate
@Column(name = "modified_date")
private Calendar modifiedDate;
//getters and setters omitted
堆栈跟踪
java.lang.ClassCastException: com.example.entity.graph.PartialEntity cannot be cast to org.springframework.data.neo4j.aspects.core.NodeBacked
at org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityStateFactory.getEntityState(CrossStoreNodeEntityStateFactory.java:55)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesTo(SourceStateTransmitter.java:95)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.write(Neo4jEntityConverterImpl.java:170)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.write(Neo4jEntityPersister.java:179)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:247)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:235)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:365)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:354)
at org.springframework.data.neo4j.repository.AbstractGraphRepository.save(AbstractGraphRepository.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:414)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:399)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:371)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy113.save(Unknown Source)
at com.example.api.controller.UserController.test(UserController.java:51)
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:497)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:291)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter.doFilter(DefaultLoginPageGeneratingFilter.java:155)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.autoconfigure.MetricFilterAutoConfiguration$MetricsFilter.doFilterInternal(MetricFilterAutoConfiguration.java:90)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Neo4jConfig
@Configuration
@EnableTransactionManagement(mode=AdviceMode.ASPECTJ)
@EnableNeo4jRepositories(basePackages = "com.example.repository.graph")
public class Neo4jConfig extends CrossStoreNeo4jConfiguration
Neo4jConfig()
setBasePackage("com.example.entity.graph");
@Bean(destroyMethod = "shutdown")
public GraphDatabaseService graphDatabaseService()
return new SpringCypherRestGraphDatabase("http://localhost:7474/db/data","neo4j", "neo4j");
SpringDataConfig
@Configuration
@EnableJpaAuditing
@EnableTransactionManagement(mode=AdviceMode.ASPECTJ)
@EnableJpaRepositories(basePackages = "com.example.repository.rdbms", entityManagerFactoryRef="entityManagerFactory", transactionManagerRef="transactionManager")
public class SpringDataConfig
// @Bean
// public AuditorAware<AuditableUser> auditorProvider()
// return new AuditorAwareImpl();
//
SpringSecurityConfig
@EnableWebSecurity
@Configuration
public class SpringSecurityConfig extends WebSecurityConfigurerAdapter
/**
* Environment configuration properties.
*/
@Autowired
private Environment env;
/**
* User Service to encode passwords.
*/
@Autowired
private UserService userService;
/*
* (non-Javadoc)
*
* @see org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter#configure(org.
* springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder)
*/
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception
auth.userDetailsService(userService).passwordEncoder(new BCryptPasswordEncoder());
/*
* (non-Javadoc)
*
* @see org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter#configure(org.
* springframework.security.config.annotation.web.builders.HttpSecurity)
*/
@Override
protected void configure(HttpSecurity http) throws Exception
http.httpBasic().and().authorizeRequests().antMatchers("/resources/**", "/signup", "/users", "/users/test").permitAll()
.anyRequest().authenticated().and().formLogin().usernameParameter("email").permitAll().and().logout()
.logoutUrl("/logout").logoutSuccessUrl("/").permitAll().and().csrf().disable();
应用配置
@SpringBootApplication
public class ApiConfiguration
/**
* Main entry point for the REST API of the application.
*
* @param args Command line arguments.
*/
public static void main(String[] args)
SpringApplication.run(ApiConfiguration.class, args);
@Bean
@Profile("local")
public EmbeddedServletContainerFactory servletContainer()
TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();
try
File keystore = new ClassPathResource("config/local/local.keystore").getFile();
connector.setScheme("https");
connector.setSecure(true);
connector.setPort(8443);
protocol.setSSLEnabled(true);
protocol.setKeystoreFile(keystore.getAbsolutePath());
protocol.setKeystorePass("changeit");
protocol.setKeyAlias("tomcat");
catch (IOException ex)
throw new IllegalStateException("Unable to access keystore", ex);
tomcat.addAdditionalTomcatConnectors(connector);
return tomcat;
一些测试代码
@Autowired
PartialEntityRepository partialEntityRepository;
@Autowired
FullNodeEntityRepository fullNodeEntityRepository;
@Autowired
UserService userService;
@RequestMapping("/test")
public void test()
User owner = new User();
owner.setFirstName("Tiny");
owner.setLastName("Tim");
owner.setEmail("tiny.tim@test.com");
owner.setRole(Role.USER);
UserDetails userDetails = new UserDetails();
userDetails.setPassword("test");
Optional<User> ownerOpt = userService.create(owner, userDetails); /this persists to postgres
FullNodeEntity fullNodeEntity = new FullNodeEntity();
fullNodeEntity.setName("Test Name");
fullNodeEntity.setDescription("Test Description");
fullNodeEntityRepository.save(fullNodeEntity); //this persists to neo4j
PartialEntity partialEntity = new PartialEntity();
partialEntity.setName("Test Name");
partialEntity.setDescription("Test Description");
partialEntityRepository.save(partialEntity); //This throws the exception
【问题讨论】：
相关！ ***.com/questions/30920503/… 【参考方案1】：根据 Michael Hunger 和 Oliver Gierke 的说法，跨存储持久性是一个没有成功的实验（请参阅 https://twitter.com/mesirii/status/611659457291026432 ）。对于多语言持久性，您似乎必须自己动手;)
【讨论】：
是否有任何关于如何滚动我们自己的教程或示例？我们在哪里可以学习做到这一点？我问是因为我想在我的应用程序中同时使用 JPA 和 Neo4J ***.com/questions/32296676/… 不幸的是，没有滚动您自己的示例，但是有一些公认的方法可以实现最终的一致性。第一个是像 Atomikos 或 Bitronix（更多信息 javaworld.com/article/2077714/java-web-development/…）这样的全局事务管理器，使用 SQS、RabbitMQ 等消息传递系统建立最终一致性。或者使用链式事务管理器使用尽力而为的方法（更多信息***.com/questions/15817909/…） 另见以下 SO ***.com/questions/30920503/… @simonl 也很有用，javaworld.com/article/2077963/open-source-tools/…以上是关于如何使用 spring-data-neo4j-cross-store 在 neo4j 和 postgres 之间的部分 NodeEntity 上支持跨存储持久性？的主要内容，如果未能解决你的问题，请参考以下文章
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