JPA and eclipselink - Overriding FetchType.Eager

Question

I have a class where a few members have annotation:

@ManyToOne(fetch = FetchType.EAGER)

In the specific part of my program, these load far too many data. Unfortunately, I can't change these annotations as this will influence performance of other parts of this program. Is there a way in eclipselink to change this to LAZY for 1 specific JPQL query?

To phrase this an other way, you can change LAZY to EAGER by using a fetch join. I'm hoping for something which changes EAGER to LAZY

score 2 · Accepted Answer · answered Aug 11 '11 at 14:53

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It's not possible. My rule of thumb is : make everything LAZY, and use custom queries if you want eager fetching.

The best you can do is to load tuples (and populate DTOs) instead of loading entities.

answered Aug 11 '11 at 14:53

JB Nizet

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I think I'll just live with the horrible performance until we can do a more major overhaul. – hyperman Aug 16 '11 at 07:25

score 0 · Answer 2 · answered Aug 12 '11 at 09:08

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I know that since eclipselink 2.3 you can extend your entities at runtime, maybe check that? http://wiki.eclipse.org/EclipseLink/Examples/JPA/Extensibility

answered Aug 12 '11 at 09:08

Dorpsidioot

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This is scary stuff, maintenance-wise ;-) Even so, thanks for letting me know about this corener of eclipselink. One day it will be handy! – hyperman Aug 16 '11 at 07:28

JPA and eclipselink - Overriding FetchType.Eager

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