Thanks Martin for your reply! Your reply
confirmed my understanding of @Vetoed.
What is the expected behaviour if I
exclude my JavaEE component class in the filter under beans.xml? Will this
cause the JavaEE component class being ignored by CDI or this should have
the same effect as being annotated as @Vetoed?
"In the 12.4.2, it states: If the filter is active,
and: .... then we say that the type is excluded from discovery."
Does the above discovery mean both type
and bean discovery or just bean discovery? If it means both type and bean
discovery, the classes should be ignored by CDI. Please confirm.
Many thanks,
Emily
===========================
Emily Jiang
WebSphere Application Server Liberty Profile development, CDI Development
Lead
MP 211, DE3A20, Winchester, Hampshire, England, SO21 2JN
Phone: +44 (0)1962 816278 Internal: 246278
Email: emijiang@uk.ibm.com
Lotus Notes: Emily Jiang/UK/IBM@IBMGB
From:
Martin Kouba <mkouba@redhat.com>
To:
Emily Jiang/UK/IBM@IBMGB,
cdi-dev@lists.jboss.org,
Date:
07/08/2015 03:40
Subject:
Re: [cdi-dev]
Clarification on the difference on Vetoed and exclude filters regarding
Java EE component classes
Sent by:
cdi-dev-bounces@lists.jboss.org
Dne 6.8.2015 v 15:55 Emily Jiang napsal(a):
> In the section 3.6. Java EE components of CDI 1.2 specification, it
has
> the following statement:
>
> /It is safe to annotate Java EE components with //@Vetoed //to prevent
> them being considered beans./
>
> According to my understanding, the JavaEE component classes with @Vetoed
> should still support injections and *ProcessInjectionTarget*events
> should still be fired.
>
> In the 12.4.2, it states:
> /If the filter is active, and: .... then we say that the type is
> excluded from discovery./
>
> Does this mean if a JavaEE component class is excluded from the scan
in
> the beans.xml, its CDI involvement should be ignored (@Inject would
be
> ignored etc)?
I don't think so. I believe the intent of "3.6. Java EE components"
is
to clarify that if a component class (e.g. a servlet class) is also
recognized as a managed bean [1] there will be two different
"components" in your applicaion, each managed by a different
Java EE
technology - e.g. a servlet managed by the servlet container and a CDI
bean with servlet class in its set of bean types.
The servlet has a different lifecycle, it's managed by a servlet
container and as such must support injection (but cannot be injected, etc.).
This might be confusing and therefore it's a good idea to veto the Java
EE component classes -> there will be no CDI bean definitions based
on
the component classes.
[1]
http://docs.jboss.org/cdi/spec/1.2/cdi-spec.html#what_classes_are_beans
>
> Many thanks,
> Emily
> ===========================
> Emily Jiang
> WebSphere Application Server Liberty Profile development, CDI
> Development Lead
>
> MP 211, DE3A20, Winchester, Hampshire, England, SO21 2JN
> Phone: +44 (0)1962 816278 Internal: 246278
>
> Email: emijiang@uk.ibm.com
> Lotus Notes: Emily Jiang/UK/IBM@IBMGB
>
> Unless stated otherwise above:
> IBM United Kingdom Limited - Registered in England and Wales with
number
> 741598.
> Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire
PO6 3AU
>
>
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>
--
Martin Kouba
Software Engineer
Red Hat, Czech Republic
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