[cdi-dev] Would @PostActivate, @PrePassivate and @Remove make sense in JSR 250 ?

[John D. Ament]

PostActivate/PrePassivate are only applicable to EJBs (as of now).  EJBs
work off of a pool of objects and these life cycle methods are typically
used (from the use cases I've dealt with them) to initiate or destroy some
end user data for the context in which they are used.

I think you might be thinking of PostConstruct/PreDestroy which match to
the CDI/ManagedBean paradigm better.  There's no pool of these objects
around, they simply get created and destroyed when done.  For each of the
scopes you mentioned, I would use a PostConstruct/PreDestroy method to do
the same thing.

John

On Sun Dec 28 2014 at 7:39:14 AM Antonio Goncalves <
antonio.goncalves at gmail.com> wrote:

> Hi all,
>
> I was playing with @SessionScoped beans... and wondered if @PostActivate,
> @PrePassivate and @Remove would make sense in JSR 250 ?
>
> At the moment these annotations belong to the javax.ejb package and are
> only used in @Stateful EJBs. With CDI scopes, we end up with a few
> "stateful" scopes (@SessionScoped, but also @ConversationScoped,
> @ViewScoped...) so why not having the same functionality in CDI ?
> @PreDestroy and @PostConstruct are already part of JSR 250. So why not
> having @PostActivate and @PrePassivate as well so they could be used in
> every bean ?
>
> BTW, while I was playing with @SessionScoped beans, I asked Antoine to
> show me how to remove a bean from the session. It's only a few lines of
> code, but again, why not having a @Remove annotation that does that (the
> exact same one of javax.ejb.Remove) ?
>
> To summarize, why not taking some of those stateful EJB concerns back to
> JSR 250 so they could be used anywhere ?
>
> Any thoughts ?
>
> --
> Antonio Goncalves
> Software architect, Java Champion and Pluralsight author
>
> Web site <http://www.antoniogoncalves.org> | Twitter
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