Hi Andreas,
When your validator fails, you remain on the FormPage. A quick debug
session shows me that the injected IService remains the same accross
requests.
The fix for your problem is simple, and a best practice anyway: inject
Provider<EntityManager> in your service.
It's a best practice since the service does not know the "scope" of the
entitymanager, all it knows is that the entitymanager has a different
lifecycle; Your service may be instantiated and kept around for the time
your app is running, but could also be instantiated on the fly when needed.
That's one of the reasons why Provider<> was invented: if the scope is
different, a provider allows you to nicely deal with it.
In case you are not familiar with providers: it has no negative
side-effects in terms of performance.
The guice-persist module binds the EntityManager per request, so all
calls to Provider<EntityManager> while in the same request will yield
the exact same EntityManager instance.
Met vriendelijke groet,
Kind regards,
Bas Gooren
Op 27-6-2013 22:03, schreef Andreas Lundblad:
On Thu, Jun 27, 2013 at 3:59 PM, Bas Gooren <b...@iswd.nl> wrote:
I'm not the one who posed the original question.
Andreas, like I said: please show us some code, and we can help you pinpoint
your issue.
Thanks for all the rapid help!
I've created a minimal page that shows the error. Basically no
difference from the original code (
http://github.com/javadev/wicket-guice-demo )
To reproduce:
1. Download and unzip http://aoeu.se/www/wicketguice-problem.zip
2. mvn jetty:run
3. Go to localhost:9090, then go to "Form page"
4. Try to submit "gavin"
5. Try to submit "gavin" again.
This results in the 'EntityManager is closed' exception. No idea how
to solve this. If it's unsolvable, I'll look into the Provider
approach, but it would be really nice to manage without it.
best regards,
Andreas Lundblad
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