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icon5.gif  Two-tier application: Turn off entire cache [message #634291] Thu, 21 October 2010 03:39 Go to next message
No real name is currently offline No real name
Messages: 1
Registered: October 2010
Junior Member
Hello,

we're using EclipseLink in a two-tier architecture. We've already turned off the second level cache but are still experiencing problems with stale data regarding the find() method.

Is there any way to turn off L1 cache / identity map for those find() queries? At the moment we just do a refresh on the returned object but this just doesn't feel right.

Best regards,

Fabian

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Re: Two-tier application: Turn off entire cache [message #634323 is a reply to message #634291] Thu, 21 October 2010 05:30 Go to previous messageGo to next message
Tom Eugelink is currently offline Tom Eugelink
Messages: 801
Registered: July 2009
Senior Member
I also use Eclipselink in a fat (Swing) client, with multiple EntityManagerFactories and one EM per window. We configure EL like this to disable all EMF level caching (EM is ok):

lOptions.put(PersistenceUnitProperties.CACHE_SHARED_DEFAULT, "false"); // do not use the shared cache (otherwise refresh will not update from db)

(We use programmatic configuration, but there is a XML equivalent.)

Tom

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Re: Two-tier application: Turn off entire cache [message #634448 is a reply to message #634291] Thu, 21 October 2010 14:15 Go to previous message
James Sutherland is currently offline James Sutherland
Messages: 1844
Registered: July 2009
Senior Member
An EntityManager must manage everything used in it persistence context. To avoid this, you must either create a new EntityManager (such as per transaction) or call clear() on the EntityManager.

EclipseLink also has support for a WEAK EntityManager.

James : Wiki : Book : Blog

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