[webbeans-dev] Replacement pattern for Manager.getInstanceByType

[Pete Muir]

On 22 Jul 2009, at 01:17, Peter Royle wrote:

>>> You just use the manager to create a CreationalContext for the bean.
>>>
>>> beanManager.createCreationalContext(bean)
>>>
>
> Sounds like just what I need, thanks.
>
>> You should always use the same creational context for the lifecycle  
>> of
>> the bean instance (for creation and destruction) otherwise generate a
>> new one.
>
> I'm only going to generate the bean once during the life of the app
> (it's @ApplicationScoped). IIUC, thereafter the CreationalContext  
> should
> be ignored.

Yes.

>
> Now, is the CreationalContext then stored with the bean instance and
> used for destruction automatically (seems that way in
> AbstractMapContext.destroy(Contexual) )?

Yes, if you just clean up the context (either manually via the yet-to- 
be-defined WB SPI [1] or automatically via the ServletListener) then  
WB takes care of using the correct creationalContext for destroying  
the bean.

[1] Currently you have to use calls against the impl for this

>
> Thanks,
>
> Pete.
>
>>
>> On 21 Jul 2009, at 16:18, Dan Allen wrote:
>>
>>> On Tue, Jul 21, 2009 at 10:50 AM, Peter Royle <howardmoon at screamingcoder.com
>>>> wrote:
>>> Sorry to drag this up again, but this has changed now that
>>> manager.getReference(...) requires a CreationalContext, about  
>>> which I
>>> know very little. I'll try reading the latest spec soon, but in the
>>> meantime if anyone has any silver bullets please let me know.
>>>
>>> I'm currently using this utility method:
>>>
>>>    public static <T> T getInstanceByType(BeanManager manager,
>>> Class<T> type, Annotation... bindings) {
>>>        return (T)manager.getReference(
>>>                manager.getBeans(type).iterator().next(), type,  
>>> null);
>>>    }
>>>
>>> Obviously it's that null at the end (where CreationalContext should
>>> be) that's causing the problem.
>>>
>>> You just use the manager to create a CreationalContext for the bean.
>>>
>>> beanManager.createCreationalContext(bean)
>>>
>>> If an instance already exists, the CreationalContext is not used.
>>> Someone correct me if I am wrong.
>>>
>>> -Dan
>>>
>>> -- 
>>> Dan Allen
>>> Senior Software Engineer, Red Hat | Author of Seam in Action
>>> Registered Linux User #231597
>>>
>>> http://mojavelinux.com
>>> http://mojavelinux.com/seaminaction
>>> http://in.relation.to/Bloggers/Dan
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>>
>