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[ejb-spec users] [jsr345-experts] Re: Re: PassivationTimeout (was: [JIRA] Commented: (EJB_SPEC-56) Preventing Passivation of SFSBs)

From: Reza Rahman <reza_rahman_at_lycos.com>
Date: Tue, 8 May 2012 19:28:23 -0400

Linda brings up a good point...

> -----Original Message-----
> From: Linda DeMichiel [mailto:linda.demichiel_at_oracle.com]
> Sent: Tuesday, May 08, 2012 7:26 PM
> To: jsr345-experts_at_ejb-spec.java.net
> Subject: [ejb-spec users] [jsr345-experts] Re: PassivationTimeout (was: [JIRA]
> Commented: (EJB_SPEC-56) Preventing Passivation of SFSBs)
>
> The timeout itself strikes me as more a tuning parameter that is more
> appropriate to a product configuration than as something that we should be
> standardizing on.
>
> If destroying the instance is preferable to passivating it, that can be achieved by
> throwing an exception from the PrePassivate method.
>
> Otherwise, this seems to provide advice to the container that in deciding how to
> manage resources, passivation of the given bean type
> should come low on the list. If it is important to specify
> that, then I guess I'd prefer to see a DoNotPassivate metadata
> annotation/element rather than a timeout value.
>
> What requests for a timeout value per se have we otherwise seen?
>
> On 5/8/2012 3:07 PM, Marina Vatkina wrote:
> > Experts,
> >
> > Please vote
> >
> > A) if you agree to add the @PassivationTimeout to the EJB3.2
> > B) if you don't think it is necessary
> >
> > thanks,
> > -marina
> >
> > -------- Original Message --------
> > Subject: [ejb-spec issues] [JIRA] Commented: (EJB_SPEC-56) Preventing
> > Passivation of SFSBs
> > Date: Tue, 8 May 2012 21:30:20 +0000 (GMT+00:00)
> > From: Carlo de Wolf (JIRA) <jira-no-reply_at_java.net>
> > Reply-To: issues_at_ejb-spec.java.net
> > To: issues_at_ejb-spec.java.net
> >
> >
> >
> > [
> > http://java.net/jira/browse/EJB_SPEC-56?page=com.atlassian.jira.plugin
> > .system.issuetabpanels:comment-
> tabpanel&focusedCommentId=339309#action
> > _339309
> > ]
> > Carlo de Wolf commented on EJB_SPEC-56:
> > ---------------------------------------
> >
> > http://docs.oracle.com/javaee/6/api/javax/ejb/StatefulTimeout.html#val
> > ue%28%29
> >
> > A value of -1 means the bean will never be passivated due to timeout.
> >
> >> Preventing Passivation of SFSBs
> >> -------------------------------
> >>
> >> Key: EJB_SPEC-56
> >> URL: http://java.net/jira/browse/EJB_SPEC-56
> >> Project: ejb-spec
> >> Issue Type: New Feature
> >> Affects Versions: 3.2
> >> Reporter: abien
> >>
> >> Stateful Session Beans can be passivated (and so often serialized) by
> >> the container to disk to save resources. This behavior can lead to
> >> problems with performance, scalability and even robustness of the
> application. A SFSB may contain non-serializable attributes which prevent a
> successful serialization and lead to runtime exceptions.
> >> Proposal: introduction of @NotPassivable annotation (TODO: suggest
> >> better name) to prevent passivation of SFSB. SFSB denoted with this
> >> annotation should never be passivated and the methods ejbActivate and
> ejbPassivate never invoked. In an overload scenario the container is supposed to
> destroy the SFSB instances, instead of passivating them.
> >> @Documented
> >> @Target({ElementType.METHOD, ElementType.TYPE})
> >> @Retention(RetentionPolicy.RUNTIME)
> >> public @interface NotPassivable {
> >> }
> >