[richfaces-issues] [JBoss JIRA] (RF-12028) a4j:outputPanel - Error message enhancement

[Jean ANDRE (JIRA)]

    [ https://issues.jboss.org/browse/RF-12028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680439#comment-12680439 ] 

Jean ANDRE commented on RF-12028:
---------------------------------

Well,
     - for a div -> silent, ignore, no message

     - for a div with duplicate attribute ->
       Error 500: javax.servlet.ServletException: Error Parsing /pages/client/infoClient.xhtml:
       Error Traced[line: 30] L'attribut "class" a déjà été indiqué pour l'élément "div".

     - for a h:message -> silent, ignore, no message
       Error 500: javax.servlet.ServletException: Error Parsing /pages/client/infoClient.xhtml:
       Error Traced[line: 49] L'attribut "globalOnly" a déjà été indiqué pour l'élément "h:messages"

     - for h:panelGrid -> silent, ignore, no message


     - for h:panelGrid with duplicate attribute ->
       Error 500: javax.servlet.ServletException: Error Parsing /pages/client/infoClient.xhtml:
       Error Traced[line: 57] L'attribut "columns" a déjà été indiqué pour l'élément "h:panelGrid". 

To summarize:
 1) an invalid attribute is ignore, server does not stop and no message appears on the console
 2) an duplicate valid attribute trigger an HTTP error 500. Line number and attribute name and tag are clearly identified.
 3) Note also, from our experience, MyFaces implementation is more strict and reports more errors at the console level.

>From my side, I prefer to have a warning message at the console/log for these trivial errors, it helps to maintain a clean code since even the IDE does not detect such error.



 
                
> a4j:outputPanel - Error message enhancement
> -------------------------------------------
>
>                 Key: RF-12028
>                 URL: https://issues.jboss.org/browse/RF-12028
>             Project: RichFaces
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>         Environment: JSF / Mojarra 2.1.6 - cssparser-0.9.6 - guava-11.0.1 - hibernate-validator-4.2.0.Final - springframework 3.0.6.RELEASE - richfaces--4.2.0.Final - sac-1.3 - FireFox 10 - WAS 8.0.0.1 / Windows 7
>            Reporter: Jean ANDRE
>              Labels: waiting_on_user
>
> When we set an non existing attribute on a4j:outputPanel, for eg. "class" because we have converted a div to a a4j:outputPanel, the error message displayed at the user interface does not inform the developer about the faulty component. The message we got is only :
> > Error 500: javax.servlet.ServletException: Setter not found for property class 
> This error message is not very helpful to debug.... ;)
> {code}
> <a4j:outputPanel id="product"
>              layout="block"
>               class="dark-box"
>            rendered="#{productBean.expanded eq true}">
> {code}
> We should have, as usual, the line of the XHTML file or the component name, the line number, well something more accurate that really help to go faster.

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