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From "Nuno G. de M (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DELTASPIKE-914) Rendering a dynamic p:graphicImage whose StreamConent is in a Deltaspike ViewScoped bean seems not to work
Date Fri, 29 May 2015 16:18:17 GMT

    [ https://issues.apache.org/jira/browse/DELTASPIKE-914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14565018#comment-14565018
] 

Nuno G. de M commented on DELTASPIKE-914:
-----------------------------------------

Hi,
FYI

I've also opened an issue under primefaces:
https://github.com/primefaces/primefaces/issues/374

Many thanks,
Nuno.

> Rendering a dynamic p:graphicImage whose StreamConent is in a Deltaspike ViewScoped bean
seems not to work
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: DELTASPIKE-914
>                 URL: https://issues.apache.org/jira/browse/DELTASPIKE-914
>             Project: DeltaSpike
>          Issue Type: Bug
>          Components: JSF-Module
>    Affects Versions: 1.4.0
>         Environment: All containers - tested on Weblogic 12.1.2 but the issue is cross
cuting
>            Reporter: Nuno G. de M
>              Labels: graphicImage, primefaces, viewaccesscoped
>
> Hi,
> This issue has to do with incompatibility between primefaces p:graphicImage and deltaSpike
ViewAccessScoped beans.
> The prime faces graphic image apperently has two core modes of rendering an html <img>
component. On one mode it will generate a resource to a statically available image. 
> Under this scenario we have no problems even when workign with a ViewAccessScoped bean
to provide the img resource path.
> Such as:
>  <h:panelGroup layout="block">
>                     <h:outputText value="As resource determined from viewSopecedBean:
" />                                        
>                     <br/>
>                     <br/>
>                     <p:graphicImage id="previewImageB"  value="#{resource[viewScopeadBean.imageResource]}"
 width="250px" height="250px" rendered="true" />
>                 </h:panelGroup>
> However, when rendering dynamic content, ViewAccess scoped beans are not compatible,
as the primefaces dynamic content handler tries to evaluate a ValueExpression and the ViewScopedBean
context appears not to be active.
> <h:panelGroup layout="block">
>                     <h:outputText value="As dynamicRsource determined fromViewScopedBean:
" />                                        
>                     <br/>
>                     <br/>
>                     <p:graphicImage id="previewImageC"  value="#{viewScopeadBean.streamedContent}"
 width="250px" height="250px" rendered="true" />
>                     
>                     <br/>
>                     <p> Ok and here we have our bug. 
>                         The problem we have here seems to be that PrimeResourceHandler
and the GraphicImageRenderer work together without problems with deltaspike when dealing with
static content. 
>                         However, when we are dealing with dynaminc content set on page
bean
>                         the Renderer will tune the session context with the expression
language of the .xhtml page so when the browser asks for the img src,                    
    
>                         PrimeResourceHandler will be able to discover what EL was associated
to that img resource
>                         and resolve on the fly the dynamic content asked by the user.
>                         However, the view access scoped seems not be available for PrimeFaces
so he comes out empty handed.
>                     </p>
>                 </h:panelGroup>
> I have written a small sample application that renders the image of a labrador using
both flavors (static resource and dynamic resource).
> https://github.com/99sono/delta-spike-dynamic-content_issue
> https://github.com/99sono/delta-spike-dynamic-content_issue/blob/master/src/main/resources/BugOverview.docx
> I am not sure if a bug should not be opened as well to primefaces, since it looks to
me that addressing this issue will most likely require coordination on both teams.
> The only work-around for this seems to be to re-factor code to use request scoped beans
or session scoped beans.
> Or if geting view scoped beans to work together with this component is really a must,
which in our case it is....
> We will have to come-up with a temporary hack to the
> p:graphicImage renderer and to the PrimeResourceHandler to be able to somehow bypass
the fact that ViewAccess scope is not available.
> I really do not wish to go down this path  - more than temporarily.
> Thank you for your support,
> Kindest regards,
> Nuno.



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