This is what we use, and it works well:
@Retain
private BeanModel model;
{
model = beanModelSource.createEditModel(Organization.class,
messages);
model.add("organizationType");
model.add("parentOrganization");
}
public BeanModel getModel() { return model; }
- Ville
tapestryphoto wrote:
>
>
> My grid data required a model. In copying this in from an example I had:
>
> @SuppressWarnings("unchecked")
> @Property
> @Retain
> private BeanModel _myModel;
>
> The key here is @Retain. This works fine until there is a timeout
> (default 10 mins) and the page is returned to the pool whereupon it
> becomes null and thus causes Grid to fall over when it attempts to
> render. Changing Retain to Persist cured the problem. That's rather a
> nasty gotcha.
>
> QUESTION
> --------
>
> Currently I am creating my model in initialisePage(). If I were to
> contnue to use @Retain rather than @Persist, where should I be
> initialising my model?
>
> thanks,
> p.
>
>
> Quoting tapestryphoto <pho...@digiatlas.org>:
>
>> Further investigation reveals this is happening due to the page timing
>> out and being returned to the pool by the timeout specified by the
>> configuration option:
>>
>> tapestry.page-pool.active-window
>>
>> (which defaults to 10 minutes)
>>
>> So it would appear that it's being reset when returned to the pool.
>> Unfortunately I'm not very knowledgable about this - even after
>> reading the relevant info on page lifecycles. Can someone please shed
>> some light on this?
>>
>> p.
>>
>>
>> Quoting tapestryphoto <pho...@digiatlas.org>:
>>
>>>
>>> Hi!
>>>
>>> I have a form and a grid component on one of my pages (the grid is
>>> outside the form). All operates normally (using Jetty) unless I leave
>>> it for 10 minutes. If I then attempt to perform a submit I get the
>>> Null Pointer Exception listed below. It only happens on pages with the
>>> grid component. My Jetty session timeout (in webdefault.xml) is set
>>> to 30 minutes.
>>>
>>> I'm not quite sure how to proceed in tracking the problem down as the
>>> error is taking place in Grid. The ten minutes suggests a timeout -
>>> but where?
>>>
>>> Help appreciated.
>>>
>>> Thanks,
>>> p.
>>>
>>>
>>> java.lang.NullPointerException
>>>
>>> Stack trace
>>>
>>> *
>>> org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java:112)
>>> *
>>> org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java)
>>> *
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13$1.run(ComponentPageElementImpl.java:495)
>>> *
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:917)
>>> *
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$200(ComponentPageElementImpl.java:50)
>>> *
>>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13.render(ComponentPageElementImpl.java:499)
>>> *
>>> org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
>>> *
>>> org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:121)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$19.renderMarkup(TapestryModule.java:1200)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$29.renderMarkup(TapestryModule.java:1580)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$28.renderMarkup(TapestryModule.java:1561)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$27.renderMarkup(TapestryModule.java:1543)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$26.renderMarkup(TapestryModule.java:1525)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$25.renderMarkup(TapestryModule.java:1495)
>>> *
>>> org.apache.tapestry5.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:64)
>>> *
>>> org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:57)
>>> *
>>> org.apache.tapestry5.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:59)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$35.handle(TapestryModule.java:1779)
>>> *
>>> org.apache.tapestry5.internal.services.PageRenderDispatcher.process(PageRenderDispatcher.java:92)
>>> *
>>> org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:71)
>>> *
>>> org.apache.tapestry5.services.TapestryModule$17.service(TapestryModule.java:1029)
>>>
>>>
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