如何使用spring-data-neo4j-cross-store在neo4j和postgres之间的部分节点上支持跨存储持久性？

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（跨存储持久化）

给出以下配置和实体。似乎我能够将传统的RDBMS JPA实体持久化到postgres数据库，并将节点实体持久化到neo4j数据库，但是，当尝试通过跨存储持久化将部分实体持久化到两者时，我会得到下面的堆栈跟踪。它抱怨java.lang.ClassCastException说我的PartialEntity不能转换为NodeBacked。我相信这一定与跨商店配置有关，但我无法找到根本问题

我已经在github上创建了一个示例项目来演示我所面临的问题。请随意在这里查看

部分节点性

@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
}

@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

}

丰满

@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
}

@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（JPA实体）

AbstractEntity（提供id和审计内容）

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();
  // }
}

应用程序配置

@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

}

@Autowired
部分存储部分存储；
@自动连线
fullnodentityrepository fullnodentityrepository；
@自动连线
用户服务用户服务；
@请求映射（“/test”）
公开无效测试（）{
用户所有者=新用户（）；
所有者：setFirstName（“Tiny”）；
所有者：setLastName（“Tim”）；
setEmail（“微小的。tim@test.com");
owner.setRole（Role.USER）；
UserDetails UserDetails=新的UserDetails（）；
userDetails.setPassword（“测试”）；
可选的ownerOpt=userService.create（owner，userDetails）；/这将持续到postgres
FullNodeEntity FullNodeEntity=新的FullNodeEntity（）；
fullNodeEntity.setName（“测试名称”）；
fullNodeEntity.setDescription（“测试说明”）；
fullNodeEntityRepository.save（fullNodeEntity）；//这将持续到neo4j
PartialEntity PartialEntity=新的PartialEntity（）；
partialEntity.setName（“测试名称”）；
partialEntity.setDescription（“测试说明”）；
partialEntityRepository.save（partialEntity）；//这会引发异常
}
根据Michael Hunger和Oliver Gierke的说法，跨店持久性是一个没有成功的实验（参见）。对于polyglot持久性，看起来您必须自己滚动；）
 根据迈克尔·霍恩和奥利弗·吉尔克（Oliver Gierke）的说法，跨店持久性是一个没有成功的实验（参见）。对于polyglot持久性，看起来您必须自己滚动；）
 相关的！相关的相关的有没有关于如何推出我们自己的产品的教程或示例？我们在哪里可以学会这样做？我这么问是因为我想在我的应用程序中同时使用JPA和Neo4J。不幸的是，没有一个例子可以让你自己使用，但有一些公认的方法可以实现最终的一致性。第一种是全局事务管理器，如Atomikos或Bitronix（更多信息），使用消息传递系统，如SQS、RabbitMQ等，以建立最终的一致性。或者使用链式事务管理器（更多信息）使用尽力而为的方法也请参见以下内容。因此@SimonLaw也很有用，是否有关于如何使用我们自己的工具的教程或示例？我们在哪里可以学会这样做？我这么问是因为我想在我的应用程序中同时使用JPA和Neo4J。不幸的是，没有一个例子可以让你自己使用，但有一些公认的方法可以实现最终的一致性。第一种是全局事务管理器，如Atomikos或Bitronix（更多信息），使用消息传递系统，如SQS、RabbitMQ等，以建立最终的一致性。或者使用链式事务管理器（更多信息）使用尽力而为的方法也请参见以下内容。因此@SimonLaw也很有用，是否有关于如何使用我们自己的工具的教程或示例？我们在哪里可以学会这样做？我这么问是因为我想在我的应用程序中同时使用JPA和Neo4J。不幸的是，没有一个例子可以让你自己使用，但有一些公认的方法可以实现最终的一致性。第一种是全局事务管理器，如Atomikos或Bitronix（更多信息），使用消息传递系统，如SQS、RabbitMQ等，以建立最终的一致性。或者使用链式事务管理器（更多信息）使用尽力而为的方法也请参见以下内容，
@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

}