a serious design defect
-----------------------
Key: RF-4248
URL:
https://jira.jboss.org/jira/browse/RF-4248
Project: RichFaces
Issue Type: Bug
Affects Versions: 3.1.4
Reporter: zhou careprad
Priority: Minor
Fix For: 3.1.x
We encounter a serious problem in the project that based on richfaces.
for example:
<h:panelGrid id="boxGrid" binding="#{bean.boxGrid}">
</h:panelGrid>
<a4j:commandButton ajaxSingle="true" id="testButton"
value="TEST"
binding="#{bean.testButton}"></a4j:commandButton>
<h:panelGrid style="display:none">
<a4j:poll id="poll"
actionListener="#{pollRequestBean.poll}"
binding="#{pollRequestBean.pollButton}" interval="2000"
/>
</h:panelGrid>
as you see,we want to modify the panelGrid(id="boxGrid") when user click the
button(id="testButton"),then when rerender,some changes will show in the
content
of the panelgrid.And,the poll is also what we needed(the reason is affirmative). But this
has a big problem--synchronization!
in such case:a user click a button,richfaces fire the event to it's listener(alias as
'la'),and the listener(la) began to update the boxGrid(the back-binding of the
panelGrid),in the same time,the poll also come to request,what happen--the new comming
request will update the richfaces' component tree,the boxGrid(the back-binding)
also update,but the listener(la) did not know this,it still hold the old model,this cause
the change to the model has no mean to the ui.
We have try many method to solve this problem,but all is in vain.you may think push,the
push alos will update the component tree when the event is fired.
I think this a serious problem to richfaces.
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