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https://issues.apache.org/jira/browse/MYFACES-3881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13968224#comment-13968224
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Leonardo Uribe commented on MYFACES-3881:
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Thanks for the example. I see the point, so you are creating an action that
just send a redirect if no window id parameter is set by default. It is like
"client" mode, but in this case the param is generated in the server.
It looks like this issue is a duplicate of MYFACES-3816 . We cannot really
change the "url" mode, because that's the minimal mode defined by the spec, and
the TCK relies on it. But we can create a new mode for client window that do
the same as the hack you are doing. Maybe create it as url-redirect, because it
works like the default url mode but redirects to the same page if no client
window id is on the request.
> CLIENT_WINDOW_MODE generates new windowid even if one exists
> ------------------------------------------------------------
>
> Key: MYFACES-3881
> URL: https://issues.apache.org/jira/browse/MYFACES-3881
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.2.2
> Environment: java 7, tomcat 7.0.50
> Reporter: Rene O
> Attachments: jsftest22.zip, jsftest22_new.zip
>
>
> If you use @ViewScoped beans and activate CLIENT_WINDOW_MODE (url or client)
> a page refresh generates a new windowid although the application in the
> current browser window already has a windowid.
> I think a new windowid should only be generated, if no windowid exists, e.g.
> open new window or tab with the same url.
> <context-param>
> <param-name>javax.faces.CLIENT_WINDOW_MODE</param-name>
> <param-value>url</param-value>
> <!--client doesn't work too-->
> </context-param>
> A testcase is attached.
> call url: http://localhost:8080/jsftest22/mypage.jsf
> Fill some values into field
> Press F5 to refresh the page
> => new windowid is generated => inputdata is lost, because a new @ViewScoped
> bean was created
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