[seam-issues] [JBoss JIRA] Commented: (SEAMFACES-179) s:viewaction not invoked with Mojarra 2.1.2

[Brian Leathem (JIRA)]

    [ https://issues.jboss.org/browse/SEAMFACES-179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616544#comment-12616544 ] 

Brian Leathem commented on SEAMFACES-179:
-----------------------------------------

Summary of an IRC conversation with Pete Muir and Ed Burns, and Lincoln Baxter:
pmuir states this is a problem caused by making a re-entrant call on the thread to the faces lifecycle.  The viewAction component does this by starting/executing a new JSF lifecycle within the existing JSF lifcycle:
https://github.com/seam/faces/blob/develop/api/src/main/java/org/jboss/seam/faces/component/UIViewAction.java#L405

With respect to re-entrancy, edburns says:
edburns: JSF relies on the re-entrancy model model of the servlet spec
pmuir: pre Servlet 3 that is quite clear, the servlet container will never reuse a thread before a request has ended
pmuir: in Servlet 3 I believe that requests can be suspended
edburns: the JSF spec has not been updated to account for the re-entrancy capabilities in Servlet 3.
pmuir: weld assumes that we don't have re-entrancy

Rather than trying to mess with Weld to allow this re-entrancy to work, I suggested the JSF EG discuss any changes required at the spec level to accommodate this behavior.  Lincoln suggested:
lincolnthree: in prettyfaces i just use a phase listener, unfortunately you lose out on the whole component tree goodness
lincolnthree: I'm comfortable saying that I think viewAction is a hack to get around the real problem
lincolnthree: which is that JSF doesn't support phase-level actions like a front-controller

> s:viewaction not invoked with Mojarra 2.1.2
> -------------------------------------------
>
>                 Key: SEAMFACES-179
>                 URL: https://issues.jboss.org/browse/SEAMFACES-179
>             Project: Seam Faces
>          Issue Type: Bug
>    Affects Versions: 3.0.2
>         Environment: JBoss 6.1.0-SNAPSHOT (Hudson build) with updated Weld 1.1.1-Final and updated Mojarra 2.1.2
>            Reporter: Sebastian Sachtleben
>            Assignee: Brian Leathem
>             Fix For: 3.0.3
>
>
> s:viewAction will not invoke after updating to Mojarra 2.1.2.
> Tested with:
> 	<f:metadata>	
> 		<s:viewAction action="#{myBean.validate}"/>
> 	</f:metadata>  

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira