Hi,
While trying to debug an AIOOBE that happens when a user opened the same
page in multiple tabs (the page renders a repeater where users can
remove items by clicking a button), I came across some interesting
behaviour.
I created a tiny example project to show it:
https://github.com/toby1984/wicket-ajaxtest
Observations:
1.) When you click on the very first button you notice that the AJAX
response contains exactly the same same markup that is already present
(so the page doesn't change)
2.) When you continue clicking on the buttons you will get an AIOOBE
(caused by ListItemModel.java:61) while trying to delete the last item
These issues go away when I explicitly call detach() on the repeater's
model after removing an item from the underlying list like so:
----->8---------->8---------->8---------->8---------->8---------->8---------->8-----
final AjaxButton delete = new
AjaxButton("deleteButton",item.getModel())
{
@Override
protected void onSubmit(AjaxRequestTarget target,
Form<?> form)
{
final String obj = getModelObject();
db.remove( obj );
listModel.detach();
target.add( container );
}
};
----->8---------->8---------->8---------->8---------->8---------->8---------->8-----
Is there a way to have this working properly without having to manually
detach() after mutating the repeater model's list or is this the
recommended approach ?
Thanks,
Tobias
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