[cdi-dev] [JBoss JIRA] (CDI-195) Clarify serializability requirements for extension-provided metadata

Mark Struberg (Commented) (JIRA) jira-events at lists.jboss.org
Tue Nov 22 04:36:41 EST 2011

    [ https://issues.jboss.org/browse/CDI-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644640#comment-12644640 ] 

Mark Struberg commented on CDI-195:

a.) in CDI-1.0 you cannot just inject Bean<T>, because they are no contextual instances. 
b.) This is of course a mess for InjectionPoint, they should have only really been allowed for injection into producer methods.
c.) we already discussed (way back) that any container must wrap any Bean<T> which implements PassivationCapable but is not Serializable into a container provided Serializable Bean<T>. See CDI-24. We could do the same with InjectionTarget. 

But just clarifying that all this stuff must be Serializable would be much easier.
> Clarify serializability requirements for extension-provided metadata
> --------------------------------------------------------------------
>                 Key: CDI-195
>                 URL: https://issues.jboss.org/browse/CDI-195
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Portable Extensions
>    Affects Versions: 1.0
>            Reporter: Jozef Hartinger
>             Fix For: 1.1 (Proposed)
> The spec never requires an extension-provided implementation of the Bean, Interceptor, Decorator or InjectionPoint to be serializable. The implementation indicates, whether the underlying bean is passivation capable by implementing PassivationCapable, but the implementation itself does not have to be serializable.
> For both the InjectionPoint bean and Bean metadata bean the spec says: "The built-in implementation must be a passivation capable dependency". However, this is hard to guarantee if an extension provides a non-serializable implementation of a Bean/InjectionPoint interface, e.g. the following code would cause problems at passivation:
> {code:JAVA}
> public class Bar implements Serializable {
>    @Inject
>    private InjectionPoint ip;
> }
> {code}
> If the metadata of the Bar bean (Bean<Bar>) is not serializable, Bar cannot be passivated.

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