Shu created WICKET-4655:
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Summary: Can a SpringBean's state be serialized?
Key: WICKET-4655
URL: https://issues.apache.org/jira/browse/WICKET-4655
Project: Wicket
Issue Type: Improvement
Components: wicket-spring
Affects Versions: 1.5.7
Environment: Windows/Linux, JDK 6, Spring 3.1.0
Reporter: Shu
I have Wicket page containing a SpringBean injected object that contains state.
This state is not serialized and hence not available when the user revisits the
page via the Back button.
In the example below, the DAODataProvider object has an entityClass property.
When the user goes back to the page via the Back button, the dataProvider and
dataProvider.dao properties are available, but dataProvider.entityClass is null.
public class DemoPage extends WebPage {
@Inject @SpringBean DAODataProvider dataProvider;
public DemoPage(final PageParameters parameters) throws
ClassNotFoundException, IntrospectionException {
super(parameters);
dataProvider.setEntityClass(UserAccount.class);
add(new CRUDPanel("panel", UserAccount.class, dataProvider));
}
}
@Component
@Scope("request")
public class DAODataProvider extends SortableDataProvider {
@Inject protected GeneralDAO dao;
private Class<?> entityClass;
public DAODataProvider() {
super();
}
}
The solution seems to be to do this:
public class DemoPage extends WebPage {
@Inject @SpringBean DAODataProvider dataProvider;
public DemoPage(final PageParameters parameters) throws
ClassNotFoundException, IntrospectionException {
super(parameters);
dataProvider.setEntityClass(UserAccount.class);
add(new CRUDPanel("panel", UserAccount.class, dataProvider));
}
@Override
protected void onBeforeRender()
{
dataProvider.setEntityClass(UserAccount.class);
super.onBeforeRender();
}
}
Is there a good way to indicate that a SpringBean injected object should be
bound to "page" scope?
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