[webbeans-dev] Creating instances of managed beans (including EJBs) in EE6 (was Re: non-contextual managed bean creation)

[Pete Muir]

On 13 Aug 2009, at 20:02, Kenneth Saks wrote:

>
> On Aug 13, 2009, at 2:32 PM, Pete Muir wrote:
>
>>
>> On 13 Aug 2009, at 18:12, Kenneth Saks wrote:
>>
>>>
>>> On Aug 13, 2009, at 1:00 PM, Pete Muir wrote:
>>>
>>>>
>>>> On 13 Aug 2009, at 17:03, Kenneth Saks wrote:
>>>>
>>>>>>> Let's add a web beans provided interceptor that the EJB  
>>>>>>> container
>>>>>>>
>>>
>>>
>>> 1.  Is the Interceptor type in this signature a new kind of
>>> descriptor?  What information does
>>> it hold?
>>
>> It's a CDI defined interface. http://anonsvn.jboss.org/repos/webbeans/ri/trunk/api/src/main/java/javax/enterprise/inject/spi/Interceptor.java
>> - you could also use the create() method to make an instance.
>>
>>> 2. interceptors should be a List instead of a Collection since it
>>> needs to
>>> convey the ordering.
>>
>> Yes, my bad.
>>
>>>  Does the CDI-specified interceptor metadata
>>> allow method-level
>>> granularity for @AroundInvoke?  If so, a single ordered list of
>>> interceptor classes isn't
>>> sufficient.
>>
>> Yes. Can you propose an alternative structure, as I guess you have a
>> similar structure in EJB?
>
> That means we'll need both component-level and per-method lists.  I
> don't see
> the benefit of this approach.   Why not just register a single CDI
> impl interceptor
> that knows about all the CDI-specific application interceptors?    The
> ejb container
> will register it in the right place in the chain and it can delegate
> all the
> @PostConstruct , @AroundInvoke, etc. methods appropriately.   If the
> interceptor instance
> itself needs some context we can agree on a constructor argument  
> such as
> EjbDescriptor.

I don't see why this approach prohibits that implementation.

Rather than using an internal API to transfer the needed interceptors  
from the EnterpriseBean instance to the EJB interceptor, we make this  
a public SPI, thus allowing an integrator the flexibility to choose  
how to add these interceptors to the stack.

ALR, Carlo, any comment. Which do you guys prefer?