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Is there a way to automatically expire entity from cache when using EM's find()? [message #389446]

Wed, 10 June 2009 12:32

Torben Putkonen

Messages: 34
Registered: July 2009

Member

I'm using extensively EntityManager's find() method to retrieve entities.
My issue is, that sometimes also external systems update the database, and
I need to pick up the changes, not immediately after they occur but in ten
minutes. find() method seems to ignore expiry time set using @Cache
annotation.

Is there any other way to refresh the entity than to call
EntityManager.refresh() method explicitly?

If not, is there a way to disable cache usage for find() method
completely? (I haven't yet been able to verify whether setting CacheType
to none does the trick, as it throws an error as I posted five minutes
ago.)

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Re: Is there a way to automatically expire entity from cache when using EM's find()? [message #389453 is a reply to message #389446]

Wed, 10 June 2009 13:34

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

find() should not be ignoring the cache invalidation time, I can't see how
this could occur. Ensure that the object has been invalidated or expired.
If you have already read the object into the persistence context
(transaction/entity-manager) then find() will (must) return the same
object for transaction isolation and will not check invalidation. Ensure
you have not already read the object in the same EntityManager.

Setting shared=false will disable the shared cache (but not the local
EntityManager cache, to avoid that you must clear the EntityManager, or
create a new one).

---
James
http://www.nabble.com/EclipseLink---Users-f26658.html

James : Wiki : Book : Blog : Twitter

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Re: Is there a way to automatically expire entity from cache when using EM's find()? [message #389463 is a reply to message #389453]

Fri, 12 June 2009 08:22

Torben Putkonen

Messages: 34
Registered: July 2009

Member

Thanks once again James. I was experiencing with the cache using the same
transaction. It started to work perfectly after starting a new
transaction. That's great.

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