Hi,

For experimenting purposes (so don't shoot at me :-)), I am trying to split my entities in multiple jars (while keeping a single PU) and I would like to find a way to tell hibernate to dynamically discover all those jars without having to list them in persistence.xml <jar-file/>. (That's my challenge for today.)

My first idea was to implement my own PersistenceProvider which would delegate to org.hibernate.jpa.HibernatePeristenceProvider while overriding the getJarFileUrls() of the PersistenceUnitInfo passed to createContainerEntityManagerFactory() to find all jars on the classpath which contain a particular file (say META-INF/module.xml).

The problem is that it does not work: my jar files are not added to the persistence unit because it is not fully integrated with the application server (I am using wildfly 10 BTW).

So I tried specifying, jboss.as.jpa.adapterModule = org.hibernate.jipijapa-hibernate5 in my persistence.xml to make the integration happen but then it won't use my custom PersistenceProvider (I think the provider is overridden with org.hiberate.jpa.HibernatePersistenceProvider).

I also tried with jboss.as.jpa.providerModule = application to force it to use my provider but it does not work either.

So before, I implement my own jipijapa adaptor for my use case, I would like to know if there exists some SPI in hibernate which would let me plug my own strategy for adding <jar-file/>s; there's already a org.hibernate.boot.archive.scan.spi.Scanner to scan for classes and resources in a PU, could it be tweaked to find all my jars?

Thanks,

Xavier

in the meantime, I have extended org.jboss.as.jpa.hibernate5.HibernatePersistenceProviderAdaptor, set jboss.as.jpa.adapterClass = ...CustomHibernatePersistenceProviderAdaptor in persistence.xml

Make sure that auto-discovery is enabled:



Then you can list all the jars where you have entities:

Thanks for your answer but, as I said in my first post, I wanted to create a single PU from multiple jars without explicitly listing those jars (or the entities) in persistence.xml (I wanted those jars to be auto-discovered based on the presence of a particular resource inside them).

I (naively) thought that just implementing my own PersistenceProvider (which would do the discovering in getJarFileUrls()) would be sufficient but I needed an jipijapa adaptor for it work in wildfly.

In the end, I implemented this feature with org.hibernate.boot.spi.MetadataSourcesContributor.

How you do to Hibernate start your MetadataSourcesContributor?

Allready did. Just file on META-INF

I put my class name in META-INF/services/org.hibernate.boot.spi.MetadataSourcesContributor