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From David Blevins <david.blev...@visi.com>
Subject Re: [bluprint + xbean-reflect] Use of factories
Date Thu, 23 Apr 2009 21:19:38 GMT
Curious what Dain's input on this might be.  A lot of this "deep  
object graph" work was driven by Plexus which of course also has post  
construct callbacks.

-David

On Apr 23, 2009, at 2:02 AM, Guillaume Nodet wrote:

> Another thing is related to initialization of beans and cyclic  
> dependencies.
> The Option.LAZY_ASSIGNMENT option can be set on a recipe to allo
> references to be injected at a later time when they are created and
> break cyclic dependencies.  However, calling an initialization method
> must be done only when the instance has been fully constructed.  I
> think it would be easier if xbean-reflect has built-in support for
> calling initializing methods on beans...
>
> On Thu, Apr 23, 2009 at 10:46, Guillaume Nodet <gnodet@gmail.com>  
> wrote:
>> When trying to implement the dedens-on attribute for blueprint, I had
>> to find my way in xbean-reflect about constructor recipes and nested
>> recipes.
>> In the ObjectRecipe, a factory-method can be set so that the object  
>> is
>> built by calling a static method or an instance method.
>> This will be very useful when implementing the factory stuff in  
>> blueprint.
>> However, I think there is a mismatch here.
>> In xbean-reflect, the recipe is used to create both the factory (in
>> case of an instance factory), then the factory method is called to
>> create the final object.    In blueprint, there is a notion of  
>> factory
>> component, which should be built by its own recipe, then used as a
>> reference to create the object using arguments if any, then  
>> populating
>> the created beans using properties.
>> I'd like to enhance xbean-reflect to support such factory instances  
>> by
>> references, but it would break any existing code relying on the
>> current factory mechanism.
>> Is there a need to support backward compatibility on this ?
>>
>> --
>> Cheers,
>> Guillaume Nodet
>> ------------------------
>> Blog: http://gnodet.blogspot.com/
>> ------------------------
>> Open Source SOA
>> http://fusesource.com
>>
>
>
>
> -- 
> Cheers,
> Guillaume Nodet
> ------------------------
> Blog: http://gnodet.blogspot.com/
> ------------------------
> Open Source SOA
> http://fusesource.com
>


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