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From José Luis Cetina <maxtorz...@gmail.com>
Subject Re: @Singleton @Lock(READ) to resolve, Could not instantiate converter ...
Date Sat, 13 Apr 2013 13:58:50 GMT
Howard i see you have this problem using the converter with primefaces
autocomplete, just for curiosity do you have a p:ajax inside of the
component? If so can you paste your p:ajax tag? I comment this because i
had the same problem like you but i didnt use static in my converter.
El 13/04/2013 08:47, "Howard W. Smith, Jr." <smithh032772@gmail.com>
escribió:

> Mike,
>
> On Sat, Apr 13, 2013 at 8:38 AM, Mike Kienenberger <mkienenb@gmail.com
> >wrote:
>
> >
> > Maybe your problem is that you are missing the no-arg constructor for
> > the converter.
> > Maybe that was why it worked when it was static.
> >
>
> Interesting. I'm definitely still novice to java, especially use of
> 'static', even though i used it, primarily, for adding static strings
> throughout the app. All along, I knew that 'static' means that only one
> copy will be created/instantiated within/for the parent class.
>
> I think the static reference was added (by Netbeans, when it generated the
> code for me, back in 2011), because of the following:
>
> Below, you will see that the managed bean has a reference to a stateless
> @EJB (DAO),
>
> @ManagedBean(name = "customerController")
> @RequestScoped
> public class CustomerController implements Serializable {
>
>     @EJB
>     private jpa.session.CustomerFacade ejbFacade;
>
> and, the CustomerControllerConverter.getAsObject() method references the
> @EJB which is a member of the managed bean, CustomerController. See below.
>
>             CustomerController controller = (CustomerController)
> facesContext.getApplication().getELResolver().
>                     getValue(facesContext.getELContext(), null,
> "customerController");
>             return controller.ejbFacade.find(getKey(value));
>
>
>
>
> >
> > Was there additional information in java.lang.InstantiationException,
> > like a root cause?
> >
> > I'll have to take a look at that, but I see MyFaces ApplicationImpl which
> throws the exception, but haven't made my way to looking at
> java.lang.InstantiationException, just yet.
>
>
> >
> > The two things I would try are
> > 1)  move it to a separate class
> > 2) add a no-arg constructor
> >
> >
> Will try this and let you know. I think it still may be necessary to add
> the class as a 'public static' class, so there will be only one instance of
> @FacesConverter(forClass = Customer.class) during runtime.
>
>
> > I haven't really written many converters since the annotation support
> > was added, but this is what one of the few I did write looks like.
> > This was a quick proof of concept thing, so I didn't take the time to
> > debug why @FacesConverter(forClass = ) wasn't working for me but
> > instead manually specified a converter id in the one place I used the
> > converter.
> >
>
> Yeah, I really prefer not to use converter id, or I would have to go all
> throughout my xhtml and update, accordingly. Thanks.
>
> Will share any/all updates, ASAP. Thanks Mike!
>

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