[forge-dev] JBoss and WebLogic

[Richard Kennard]

Luca,

Thanks for your time and help debugging this. I think we need to proceed with caution.

We're basically talking about hacks to work around bugs in the app server/shortcomings in the EE spec. The problem is these hacks are going to get 
re-generated for every domain entity (potentially dozens of times). It's critical we try to keep our generated code as clean as possible. In particular, we 
must keep the 'semantic complexity' low.

The solution you're suggesting (injecting a SessionContext, taking EJBObject using getBusinessInterface etc) sounds like a lot of 'semantic complexity' for 
new users to understand?

It's really important we try to find the cleanest approach. We tried/rejected a lot of variations when developing the current code. Here's one that's not 
quite as nice as the current one, but may work properly across TomEE/Weblogic/JBoss. Could you try it for me?

1. Remove all references in the generated Facelets code to: converter="#{foo.converter}"
2. Remove the 'getConverter()' method inside each xxxBean and replace with a static inner class that looks like:

     @FacesConverter( forClass = xxx.class )
     public static class xxxConverter
         implements Converter {

         @Override
         public Object getAsObject( FacesContext context, UIComponent component, String value ) {

             // EntityManager injection not reliable on all platforms

             xxx entity = new xxx();
             entity.setId( Long.valueOf( value ) );
             return entity;
         }

         @Override
         public String getAsString( FacesContext context, UIComponent component, Object value ) {

             ...
         }
     }

Here's a complete example:

https://github.com/metawidget/metawidget/blob/master/integration-tests/faces/forge/src/main/java/com/test/view/PersonBean.java

Regards,

Richard.

On 3/08/2012 9:17 PM, Luca Masini wrote:
> The fact is that we have an extended persistente unit bound to the stateful ejb, so can't be injected or looked up.
>
> I've found a solution working on my three target App Server (TomEE, Weblogic, JBoss).
>
> Inject a SessionContext and take the EJBObject using the getBusinessInterface method.
>
> For some strange reason SessionContext and his Ejb have different lifecycle so we need to take it before it is returned to the jsf client.
>
> This way it works.
>
> Il giorno venerdì 3 agosto 2012, Richard Kennard ha scritto:
>
>     Yes, you could try that. The history to this decision was:
>
>     1. The Converter needs to use an EntityManager to load the entity
>     2. For some reason you cannot (yet) inject EntityManagers into FacesConverters
>
>     So I made the Converter an inner class of the xxxBean, so that it could access the bean's EntityManager. However there would be other approaches, such as
>     looking up the EntityManager via JNDI or something.
>
>     Regards,
>
>     Richard.
>
>     On 3/08/2012 8:15 PM, Thomas Frühbeck wrote:
>     > Did you think of separating Converter and backing bean implementation?
>     > AFAIK the backing bean _provides_ a converter e.g.: #{xxxxxBean.converter} but should not implement Converter itself?
>     >
>     > Thomas
>     >
>     > Am 03.08.2012 11:13, schrieb Luca Masini:
>     >> I'm going crazy to let the generated faces scaffolding run on both WLS and JBoss.
>     >>
>     >> Infact if I let the Bean implements the Converter interface then WLS works but JBoss complaints about missing method, it's like that the implemented
>     >> interface is the Local interface for the bean and no other method is found but those in the Converter interface itself.
>     >>
>     >> So I remove the interface and everything work without the getConverter method, getAsObject and getAsString are method of the now interface bean.
>     >>
>     >> On the counter side WLS is unable to call methods from the EL into faces files that are not part of the Converter interface.
>     >>
>     >> So I'm in a deadlock. I'm unable to let it works on both the Java EE 6 server. I'm sure that a solution exist, but whichi ?
>     >>
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