Eclipse Community Forums: EclipseLink » Don't get programmatical cache invalidation to work [JPA]

Help

Home

Home » Eclipse Projects » EclipseLink » Don't get programmatical cache invalidation to work [JPA]

Show: Today's Messages :: Show Polls :: Message Navigator

Don't get programmatical cache invalidation to work [JPA] [message #788067]

Wed, 01 February 2012 10:03

Missing name Missing name

Messages: 59
Registered: July 2009

Member

Hi,

my database is externally modified so at some point I need to invalidate the entity cache in my web application.

I wrote a servlet which basically does the following:

@PersistenceContext // injected via Spring
EntityManager em;

JpaEntityManager nativeEm = em.unwrap(JpaEntityManager.class);

// this method always throws an NPE
Session session = nativeEm.getSession();

session.getIdentityMapAccessor().invalidateAll();

I also tried the other flavors of get*Session(), but none of them worked. What is the correct way to get access to an active session?

Thanks,
Marian

Environment:
GlassFish 3.1.1 w/ EclipseLink 2.3.0
MySQL 5.x

Report message to a moderator

Re: Don't get programmatical cache invalidation to work [JPA] [message #788276 is a reply to message #788067]

Wed, 01 February 2012 15:44

Shaun Smith

Messages: 197
Registered: July 2009

Senior Member

In JPA 2.0, you can use the Cache.evictAll() method to invalidate the EclipseLink caches. You'll need to inject the EntityManagerFactory and call emf.getCache().evictAll().

--Shaun

Report message to a moderator

Re: Don't get programmatical cache invalidation to work [JPA] [message #788373 is a reply to message #788276]

Wed, 01 February 2012 18:17

Marian Seitner

Messages: 5
Registered: July 2009

Junior Member

Thanks, works like a charm!

However I wonder what would have been the "hard way" using the EclipseLink session... could you give me some pointers? Especially for the problem of not getting a session through the EntityManager...

Thanks,
Marian

Report message to a moderator

Re: Don't get programmatical cache invalidation to work [JPA] [message #788380 is a reply to message #788373]

Wed, 01 February 2012 18:35

Shaun Smith

Messages: 197
Registered: July 2009

Senior Member

You should have called getServerSession() on the JpaEntityManager. The ServerSession is the object that underlies the EntityManagerFactory.

--Shaun

Report message to a moderator

Previous Topic:	Don't get programmatical cache invalidation to work [JPA]
Next Topic:	Custom MetadataSource and Dynamic Weaving

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Sat Sep 23 23:52:00 GMT 2017

.:: Contact :: Home ::.