在orm.xml中使用Hibernate二级缓存？

Question

Having been googling for hours, I realize that users can use either xml file(orm.xml, I suppose?) or annotations in JPA, or both of them at the same time. I'm i correct? So, My project use the second-level cache, which is not in the JPA specification. And I use annotations like: @org.hibernate.annotations.Cache(usage = org.hibernate.annotations.CacheConcurrencyStrategy.READ_WRITE )

for each entities. However, I guess that the annotation above doesn't belongs to be JPA annotation, therefore, I don't know if there is anything equivalent in orm.xml? I have had a look at the xml schema of orm.xml, and there is not such hibernate element permitted in the schema.

If I can't do the second-level cache config in the orm.xml, is there any way other than in the annotation? The reason that I don't want to do it the annotation is because I have two applications, one use READ_WRITE concurrency strategy and another use READ_ONLY concurrency strategy.

Thanks in advance!!!

Kewei

Answer 1

您可以使用hibernate.cfg.xml，hibernate.properties或* .hbm.xml文件打开具有不同缓存策略的特定对象的缓存

Answer 2

If you don't want to use annotations, then check the documentation of your hibernate second level cache implementation (aka "cache provider", for example, ehcache ) how to configure it.

Note that Hibernate allows to use different cache providers, so there is no general answer to your question.

Answer 3

因此，我认为我的问题的当前解决方案是用Hibernate映射文件替换每个实体的所有注释，以便对于不同的部署（应用程序），我们可以使用不同的Hibernate映射文件。