Stefan Kolb wrote:
Hi,
I would totally agree with Simon there, but surprisingly enough I found this in
the JavaAnnotations Spec:
S.30 1.8.16 @Scope
The following snippet shows a sample for a scoped service interface definition.
@Scope(“CONVERSATION”)
public interface ShoppingCartService {
void addToCart(Item item);
}
Though I think Simon is still right in practical approaches. At least I would
stick to the same rules he outlined in his answer.
Thanks for pointing this out. In the SCA 1.1 specs from OASIS, the
description of @Scope says:
The @Scope annotation MUST only be used on a service's implementation class.
It is an error to use this annotation on an interface. [JCA90041]
I wasn't aware that the older OSOA specs allowed @Scope to appear on
interfaces as well. I think the reason this was changed by OASIS is
that it is very hard to define a sensible meaning or purpose for using
an implementation concept such as scope in an interface definition.
Simon
Regards
Stefan
-----Ursprüngliche Nachricht-----
Von: Simon Nash <[email protected]>
Gesendet: 21.03.2010 19:27:31
An: [email protected]
Betreff: Re: Conversational or Conversation Scope
Antonio Mirarchi wrote:
Hi i have some questions about SCA assembly specification and Java
annotation.
1) What is the difference betwenn use a Java interface marked with
@Conversational annotation and use the same Java interface marked with
@Scope("Conversation") ?
You can't mark a Java interface with @Scope("Conversation"). The @Scope
annotation is only used for implementation classes.
2) If i have a java interface marked with @Conversational annotation the
implementation class must be annotated with @Scope("conversation")?
Not "must be" but "should be". There are some obscure cases where the
implementation class can be given a different scope such as Composite.
Although this is legal, I don't think it's very useful.
3) What is the difference between annotation @Conversational and
annotation @Scope("Conversation")?
@Conversational is only used on interfaces and @Scope is only used on
implementation classes.
Simon
thanks for your answers.
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