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https://issues.apache.org/jira/browse/WICKET-613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eelco Hillenius reassigned WICKET-613:
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Assignee: Igor Vaynberg
Igor, do you mind looking into this one please? Cheers.
> Prototype scoped Spring beans
> -----------------------------
>
> Key: WICKET-613
> URL: https://issues.apache.org/jira/browse/WICKET-613
> Project: Wicket
> Issue Type: Bug
> Components: wicket-spring
> Affects Versions: 1.3.0-beta1, trunk
> Environment: JDK 6, Jetty
> Reporter: Rüdiger Schulz
> Assignee: Igor Vaynberg
> Priority: Critical
> Fix For: 1.3.0-rc1
>
>
> I copied the following text from my discussion on wicket-user, and was asked
> to open an issue, so here it is:
> http://www.nabble.com/Prototype-scoped-Spring-beans-tf3849285.html
> For a more complex form I wanted to use a "stateful" Springbean, to which I
> applied scope="prototype". The idea is to have one bean instance for every
> Form instance. I would access the bean with PropertyModels and direct method
> calls during construction (i.e. setting initial state from input parameters)
> and during events, which would alter the state. I inject the bean into the
> Form with @SpringBean annotation.
> This works somehow, but sometimes, especially after using the backbutton, I
> had the problem that the internal state was reset. So I analyzed the stack in
> the constructor of the bean implementation, and found out that it was called
> twice during construction of the Form. First, during the super() call, and
> then again in the next line during a method call on that bean. I appended
> both stacktraces below. The proxy itself does not change.
> This happens again after going back and e.g. submitting again. This results
> in a NPE, because the internal state is reset.
> I understand from reading the mailing list that the Wicket-Proxy does nothing
> but a lookup in the Application context, and does not know or care about
> spring scope.
> And here I'm a little stuck. I am already considering to put the state into
> the Form, and make the Bean a singleton without any internal state. As that
> would mean some heavy refactoring, I would prefer a way where the Spring
> acces would work as I want. Or is this a wrong way altogether?
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