Spring Data Neo4j - Cross store persistence

Question

I am new to SDN, I am trying to do a cross store persistence with hibernate. The tutorial given in website has examples for the same, I have checked the github ones too. I have two questions

1. I am unable to do xml configuration as mentioned in the docs or examples. <neo4j:config/> doesn't support entityManagerFactory. My assumption is it creates the default Neo4jConfiguration which doesn't have a setter for entityManagerFactory. The workaround i have found is to define a CrossStoreNeo4jConfiguration bean.

   @Bean
   public CrossStoreNeo4jConfiguration crossStoreNeo4jConfiguration(){
   CrossStoreNeo4jConfiguration configuration = new CrossStoreNeo4jConfiguration();
   configuration.setEntityManagerFactory(entityManagerFactory);
   configuration.setGraphDatabaseService(graphDatabaseService);
   return configuration;
   }
   

   How to do this inside<neo4j:config/>

2. What happens when you refer a Neo4jTemplate to your repository using neo4j-template-ref when you define repositories using neo4j:repositories? what is the purpose?

UDPATE

The reason it was unable to create CrossStoreNeo4jConfiguration with <neo4j:config/> was , i was missing the dependency spring-data-neo4j-cross-store`. But now i get exception on application start up.

Caused by: java.lang.IllegalStateException: Singleton 'nodeEntityStateFactory' isn't currently in creation
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.afterSingletonCreation(DefaultSingletonBeanRegistry.java:312)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:239)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:292)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.nodeEntityStateFactory(<generated>)
at org.springframework.data.neo4j.config.Neo4jConfiguration.mappingContext(Neo4jConfiguration.java:199)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.CGLIB$mappingContext$11(<generated>)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955$$FastClassByCGLIB$$3134c8a8.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at org.springframework.data.neo4j.cross_store.config.CrossStoreNeo4jConfiguration$$EnhancerByCGLIB$$779c5955.mappingContext(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)

Thanks in advance.

Answer 1

This should work:

<neo4j:config entityManagerFactory="entityManagerFactory"/>

No need to create your custom implementation.

The template passed to the repository config is the one used by its infrastructure. In most cases there is no need to configure something different.