如何使用Spring Data JPA + Neo4j正确设置跨存储持久性？ [英] How do I properly set up cross-store persistence using Spring Data JPA + Neo4j?

问题描述

我正在尝试运行一个非常小的JPA + SDN（Spring Data Neo4j）交叉商店项目，并且我试图证明使用JPA存储库调用保存部分实体将在Neo4j中创建相应的节点。

I am trying to get a very minimal JPA + SDN (Spring Data Neo4j) cross store project running and am trying to demonstrate that saving a partial entity using a JPA repository call will create a corresponding node in Neo4j.

我已按照我在SO，Google和Spring的网站上找到的说明/建议，但目前仍然无法正常工作。我目前有一个最小的测试项目创建于：

I have followed the instructions / advice that I have been able to find on SO, Google and Spring's site but am currently still having trouble standing things up. I currently have a minimal test project created at:

https://github.com/simon-lam/sdn-cross-store-poc

该项目使用Spring Boot和有一个简单的域包含一个图形实体， GraphNodeEntity.java ，以及一个部分实体 PartialEntity.java 。我写了一个非常基本的测试， PartialEntityRepositoryTest.java ，对部分实体进行保存并看到：

The project uses Spring Boot and has a simple domain containing a graph entity, GraphNodeEntity.java, and a partial entity, PartialEntity.java. I have written a very basic test, PartialEntityRepositoryTest.java, to do a save on the partial entity and am seeing:

• 似乎使用了错误的事务管理器，因为 CrossStoreNeo4jConfiguration 类没有正确地自动装配 entityManagerFactory ，它为null


• 由于上述^，没有为我的实体分配ID


• 我没有看到任何SDN活动在日志中


• 我做错了什么？

• The wrong transaction manager seems to be used because the CrossStoreNeo4jConfiguration class does not properly autowire entityManagerFactory, it is null
• As a result of the above ^, no ID is assigned to my entity
• I do not see any SDN activity in the logs at all
• Am I doing something glaringly wrong?

更一般地说，我我希望确认一些假设并更好地理解跨店支持持久性支持：

More generally, I was hoping to confirm some assumptions and better understand cross store persistence support in general:

• 要启用它，我是否需要启用高级映射？


• 作为启用高级映射的一部分，我需要设置AspectJ;这包括启用加载时间编织？如果这样做是通过使用 @EnableLoadTimeWeaving config完成的？


• 假设我的所有配置最终都已修复，我是否应该看到当我使用JPA存储库持久化时，部分节点在Neo4j中持续存在？这应该由由方面驱动的跨店支持来处理吗？

• To enable it, do I need to enable advanced mapping?
• As part of enabling advanced mapping, I need to set up AspectJ; does this include enabling load time weaving? If so is this accomplished through using the @EnableLoadTimeWeaving config?
• Assuming that all my configuration is eventually fixed, should I expect to see partial nodes persist in Neo4j when I persist them using a JPA repository? This should be handled by the cross store support which is driven by aspects right?

感谢您提供任何帮助！

推荐答案

我向Neo4j Google Group发送了一条消息，得到了Michael Hunger的一些反馈，所以我将在这里分享：

I sent a message to the Neo4j Google Group and got some feedback from Michael Hunger so I'm going to share here:

• 结果显示跨店商店lib已暂停一段时间


• 不支持JPA回购，只有EntityManager操作


• 交叉存储设置不适用于远程服务器且未经过测试

总而言之，我的核心理解/假设已经结束！

So in summary my core understanding / assumptions were off!

来源： https://groups.google.com/forum/#!topic/neo4j/FGI8692AVJQ

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