[forge-dev] Approach to Spring Boot handling JPA

[Ivan St. Ivanov]

Hi George,

Thanks for your answer! I add our Spring Boot expert Nayden to the loop.

Well, according to the Spring documentation it is possible to have
persistence.xml:
http://docs.spring.io/spring-boot/docs/current/reference/html/howto-data-access.html#howto-use-traditional-persistence-xml

However, I see it more as a hack from our side.

Cheers,
Ivan

On Mon, Jul 27, 2015 at 10:27 PM, George Gastaldi <ggastald at redhat.com>
wrote:

>  Hi Ivan,
>
> JPAFacet depends on having a PersistenceCommonDescriptor (
> https://github.com/forge/core/blob/master/javaee/api/src/main/java/org/jboss/forge/addon/javaee/jpa/JPAFacet.java#L27),
> so I guess that extending JPAFacet is not a good idea in this case. Is it a
> problem if the persistence.xml is created for a Spring Boot project?
>
> Otherwise, I'd suggest you to create the SpringBootJPAFacet without
> reusing the JavaEE ones (and create a "Spring Boot: JPA Setup"), as they
> really don't follow JavaEE in this context beyond the JPA JARs.
>
> Best Regards,
>
> George Gastaldi
>
>
> On 07/26/2015 05:52 PM, Ivan St. Ivanov wrote:
>
> Hi folks,
>
>  As some of you probably heard, in Bulgarian JUG we are going to adopt an
> addon (as George put it a couple of months ago). Beginning of August we are
> going to develop a Forge extension for Spring Boot. One of the things that
> we are not sure yet how to tackle is persistence.
>
>  You see, Spring supports JPA. However instead of configuring it in the
> Java EE way with persistence.xml, in Spring Boot they use a properties file
> for that (and for all their configuration). The current JPA facet
> implementations however are developed with presistence.xml in mind. The JPA
> setup wizard itself is also bound somehow to presistence.xml - it picks the
> facet to install based on that file.
>
>  What we want to do is not to rewrite all the Forge commands for JPA just
> because of the fact above. We were thinking of a small change - extend
> JPAFacet with SpringBootJPAFacet. And then add a new implementation of
> PersistenceContainer -> SpringBootContainer or something? And then we have
> to change JPASetupWizardImpl to pick the facet not only based on the JPA
> version, but also based on the container.
>
>  Or maybe there is a better way?
>
>  I am expecting your feedback :)
>
>  Cheers,
> Ivan
>
>
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