Hi Dan and Team,

Sorry to go back to this subject but I don't get the expected result from @produces.
In Seam social Web client example, I tried to outject currentServiceHdl in SocialClient bean  like this :

@Produces
   @Named
   public OAuthServiceHandler getCurrentServiceHdl()
   {
      return currentServiceHdl;
   }

and I get the following exception when Social client is initialized (apparently in the @Postconstruct callback) from JSF call (notice that currentServiceHdl is not in the JSF view that triggers the exception only socilaClient) :


java.lang.NoClassDefFoundError: org/jboss/weld/exceptions/WeldException
	at org.jboss.weld.bean.AbstractClassBean.defaultPostConstruct(AbstractClassBean.java:595)
	at org.jboss.weld.bean.ManagedBean$ManagedBeanInjectionTarget.postConstruct(ManagedBean.java:200)
	at org.jboss.weld.bean.ManagedBean.create(ManagedBean.java:340)
	at org.jboss.weld.context.AbstractContext.get(AbstractContext.java:121)
	at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:99)
	at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:87)
	at org.jboss.seam.social.example.webclient.org$jboss$weld$bean-jboss$classloader:id="vfs:$$$Users$antoine$Documents$Eclipse_workspaces$seam-social$$metadata$$plugins$org$jboss$ide$eclipse$as$core$JBoss_6$0_Runtime_Server1295753022377$deploy$seam-social-web-client$war"-ManagedBean-class_org$jboss$seam$social$example$webclient$SocialClient_$$_WeldClientProxy.getServiceHandlers(org$jboss$weld$bean-jboss$classloader:id="vfs:$$$Users$antoine$Documents$Eclipse_workspaces$seam-social$$metadata$$plugins$org$jboss$ide$eclipse$as$core$JBoss_6$0_Runtime_Server1295753022377$deploy$seam-social-web-client$war"-ManagedBean-class_org$jboss$seam$social$example$webclient$SocialClient_$$_WeldClientProxy.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

removing @Produces @Named make the exception disappears.

Any clue ?

Antoine SABOT-DURAND


Le 16 mars 2011 à 23:09, Antoine Sabot-Durand a écrit :

Thanks for the douse I'm going to test this right away.

Antoine Sabot-Durand

Le 16 mars 2011 à 18:29, Dan Allen <dan.j.allen@gmail.com> a écrit :

You can create a producer that aliases a name to a property, like this:

@Produces @Named
public Hotel getHotel() { return booking.getHotel(); }

#{hotel}

You can also use a producer field, like so:

@Produces @Named
private Hotel hotel;

#{hotel}

Produces sort of turns outjection on it's head. But if you think about it, it's a better way to go about it because it's more robust to read the state of the model as it is, then try to shift the information around into variables from which to read them, as outjection did.

What you can't do is use the same variable name to refer to state on two different models, unless of course your producer method does some conditional logic (saying if this screen, give this result, if this screen, give a different result). But again, that's a good thing because then tooling can actually tell you where the data is coming from.

This is a key topic for the migration guide. Feel free to contribute examples of how you might solve an outjection scenario with produces. It's a good exercise anyway.

-Dan

On Wed, Mar 16, 2011 at 13:03, Ken Finnigan <ken@kenfinnigan.me> wrote:
If you want the result of @Produces to be EL accessible just throw a @Named on it.

Ken

Sent from my iPhone

On Mar 16, 2011, at 13:02, Antoine Sabot-Durand <antoine@sabot-durand.net> wrote:

For what I understand, it's not quite the same. I think it's more like @Factory, but I agree it's nearly the same and I could use it was possible to "Named" the "outjected" property in order to use it in EL...

Antoine 







Le 16 mars 2011 à 17:54, Ken Finnigan a écrit :

Antoine,

I'm pretty sure the equivalent for CDI is to use @Produces.

Ken


On Wed, Mar 16, 2011 at 12:47 PM, Antoine Sabot-Durand <antoine@sabot-durand.net> wrote:
Hi all,

I try to shorten my Expression language code and don't want to create delegate methods in my controller to access  propertir of a business component.

I didn't found something like @Out. Does it exists ?

Thanks,

Antoine









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Dan Allen
Principal Software Engineer, Red Hat | Author of Seam in Action
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