[jsr-314-open-mirror] [jsr-314-open] PostAddToViewEvent publishing conditions

[Leonardo Uribe]

Hi

Ok, the spec issue is this one:

https://javaserverfaces-spec-public.dev.java.net/issues/show_bug.cgi?id=782

regards,

Leonardo Uribe

2010/3/31 Leonardo Uribe <lu4242 at gmail.com>

> Hi
>
> On this link:
>
> https://issues.apache.org/jira/browse/MYFACES-2638
>
> attachment: MYFACES-2638-3.patch
>
> I attached a proposal to fix this issue, based on myfaces code. The idea is
>
> create a event called javax.faces.event.PostBuildRefreshViewEvent. This
> event
> is quite different from the one proposed in:
>
>
> [jsr-314-open] add component resources depending on the owner component
> state
>
> because there is one case this one is not published: when partial state
> saving is
> enabled and there is no call to vdl.buildView for refresh. I also notice
> that there is
> no "inheritance" between events, that means, if I have two events and one
> extends
> from the other and there is a listener attached to the parent, when the
> child event
> is raised the listener is not notified.
>
> h:outputScript, h:outputStylesheet, cc:insertChildren, cc:insertFacet needs
> to attach
> its listeners to that event too, to give the chance to relocate their
> related components
> correctly. The listener that track changes on the component tree and mark
> them to
> be saved/restored fully does not need to listen this event.
>
> PostAddToViewEvent/PreRemoveFromViewEvent should continue working as
> always,
> the important here is disable event processing while we are refreshing the
> view. The side
> effect is components added to the component tree when view is refreshed
> (c:if case) will
> not receive that event.
>
> If we want to avoid that side effect, the proposal is change
> PostBuildRefreshViewEvent
> to PostBuildViewEvent, this one will be an event specific for relocation
> and that one
> should be published after the view is build, in other words, in the same
> place as
> we are doing PostBuildRefreshViewEvent but for all cases, but that one
> requires remove
> the register of the listeners to PostAddToViewEvent on h:outputScript and
> related. Also,
> it is necessary to indicate in some way when publish PostAddToViewEvent/
> PreRemoveFromViewEvent by facelets algorithm for build/refresh view,
> because it is there
> where we have the knowledge about when propagate it or not.
>
> I think at this point it is clear the problem and the possible direction to
> solve it, so I'll create
> an issue for this one on the spec issue tracker.
>
> regards,
>
> Leonardo Uribe
>
> 2010/3/30 Leonardo Uribe <lu4242 at gmail.com>
>
> Hi Martin
>>
>> In theory the secod event (PreRemoveFromViewEvent) should not be called
>> when the view is "refreshed".
>>
>> The important for me at this point is make clear the problem, but in this
>> point
>> I think the better is do a prototype with myfaces. It will take some time,
>> but as
>> soon as I have something I'll publish the results, so we can discuss
>> a more concrete proposal. I'll integrate also the solution for the problem
>>
>> "[jsr-314-open] add component resources depending on the owner component
>> state"
>> because it seems it is related.
>>
>> regards,
>>
>> Leonardo Uribe
>>
>> 2010/3/30 Martin Marinschek <mmarinschek at apache.org>
>>
>> Hi,
>>>
>>> > - Create a new event (let's call it PostBuildViewEvent for the moment),
>>> that
>>> > is
>>> > propagated every time the view is build (when it is created, restored
>>> or
>>> > refreshed before render response). h:outputScript, h:outputStylesheet,
>>> > cc:insertChildren and cc:insertFacet should add a listener for this
>>> > event and handle all relocation code at response of this event.
>>> >
>>> > - Fix PostAddToViewEvent/PreRemoveFromViewEvent publishing conditions.
>>> > In my opinion this ones should not be called when the view is
>>> "refreshed".
>>> > Martin suggestion about the publishing conditions are reasonable.
>>>
>>> yes, this sounds good. Leonardo, for the second event, how would you
>>> suggest the publishing to happen (actual sourcecode)?
>>>
>>> best regards,
>>>
>>> Martin
>>> --
>>>
>>> http://www.irian.at
>>>
>>> Your JSF powerhouse -
>>> JSF Consulting, Development and
>>> Courses in English and German
>>>
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>>>
>>
>>
>
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