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javax.persistence.cache.retrieveMode does not work with Query [message #507957]

Fri, 15 January 2010 05:16

Eclipse User

Hello,
I had problems with the second-level-cache and reading of stale entities (Topic: "Unexpected entity version number"). Now, I am a little bit wiser Wink

, but have another problem.
I am not able to set javax.persistence.cache.retrieveMode for an entity manager (setProperty) and for a Query (setHint) (JSR317, chapter 3.7.2). But setting this hint for TypedQuery works without any problems. What is going on?

Regards
Marcin Kwapisz

Re: javax.persistence.cache.retrieveMode does not work with Query [message #507971 is a reply to message #507957]

Fri, 15 January 2010 06:45

Eclipse User

Please, ignore that part of my previus post:

Quote:

But setting this hint for TypedQuery works without any problems. What is going on?

I was expecting my test to fail, but I did not check the real reason.
Hints for TypedQuery can not work because createNamedQuery is not supported in eclipselink:

 public <T> TypedQuery<T> createNamedQuery(String name, Class<T> resultClass){
        throw new UnsupportedOperationException();
    }

But the question is still actual: how to set javax.persistence.cache.retrieveMode for an EntityManager or a Query.

Regards
Marcin Kwapisz

Re: javax.persistence.cache.retrieveMode does not work with Query [message #508356 is a reply to message #507957]

Mon, 18 January 2010 09:38

Eclipse User

That is odd, please log a bug for createNamedQuery returning TypedQuery not implemented.

You can set the retrieveMode using a Query hint,

See,
http://www.eclipse.org/eclipselink/api/2.0/org/eclipse/persi stence/config/QueryHints.html

The JPA defined hint is,
"javax.persistence.cacheRetrieveMode"

but EclipseLink also offers several other hints to configure the cache usage.

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