@Entity objects are not enhanced by the load time weaver in certain situations [SPR-8523]

[spring-projects-issues]

Matt Young opened SPR-8523 and commented

I've boiled down a confusing situation into a reproducible odd behavior in the attached example application. In an OpenJPA-supported application when there are two classes (an abstract parent and a concrete child) that are both marked with @Entity, the classes are not enhanced when an autowired @Repository DAO is called from a unit test. The DAO contains an inserted @PersistenceContext to get access to the EntityManager.

If the call to the dao is commented out, the classes are enhanced as they should be.

Using spring-instrument-3.1.M2.jar on a -javaagent line.

Notes:

• Run a mvn package with the dao call commented out and not commented out in the test class

• Observe the difference in openjpa reporting the enhancement of classes vs. not enhancing them

• It doesn't matter if you use a persistence.xml file or the new packagesToScan option in LocalContainerEntityManagerFactoryBean

---

Affects: 3.1 M2

Attachments:

• jpa-example.zip (6.77 kB)

Issue Links:

• #13148 @Configurable does not work if method with configured classes as parameter exists
• #14490 LoadTimeWeaving not working properly in Websphere

1 votes, 3 watchers

[spring-projects-issues]

Matt Young commented

Tested against 3.0.5 as well, can confirm the problem exists there also.

[spring-projects-issues]

Chris Beams commented

Hi Matt,

Thanks for attaching the project. Would you be willing to submit this as a pull request following the instructions here?

https://github.com/SpringSource/spring-framework-issues#readme

We'll look into this either way of course, but this helps streamline things.

Thanks!

Chris

[spring-projects-issues]

Matt Young commented

Thanks for your help, Chris. I've added the sample project to github (correctly, I hope) and confirmed that the same result comes out. Please let me know if anything is wrong with the commit.

[spring-projects-issues]

Chris Beams commented

Matt submitted spring-attic/spring-framework-issues#3

[spring-projects-issues]

Chris Beams commented

Confirmed the issue locally. Scheduling for RC1

[spring-projects-issues]

Chris Beams commented

This issue seems very similar to #13148, but it is not yet clear that it is a duplicate per se.

See the reproduction projects for both issues to observe the similarities (README contains instructions)

https://github.com/SpringSource/spring-framework-issues/tree/master/SPR-8502
https://github.com/SpringSource/spring-framework-issues/tree/master/SPR-8523

[spring-projects-issues]

Chris Beams commented

Also note that the reproduction project linked above has now been heavily simplified in an attempt to isolate the issue. It is quite clear what will cause the failure to enhance, but not yet clear why.

[spring-projects-issues]

Chris Beams commented

Matt, you may want to consider compile-time weaving as a workaround in the meantime. I've documented how to do this as well in the reproduction project. See the README: https://github.com/SpringSource/spring-framework-issues/tree/master/SPR-8523

[spring-projects-issues]

Matt Young commented

Thanks Chris for the helpful configuration example.... we'll try compile-time weaving until this gets sorted out.

[spring-projects-issues]

Juergen Hoeller commented

This sounds like it is basically the same issue as #14490, covered by the same fix. Please give the upcoming 3.2 RC1 a try and let us know whether it solves the problem for you...

Juergen