harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Evgueni Brevnov" <evgueni.brev...@gmail.com>
Subject Re: [drlvm][shutdown] How to cleanup resources safely?
Date Tue, 21 Nov 2006 13:11:38 GMT
On 11/21/06, Alexey Varlamov <alexey.v.varlamov@gmail.com> wrote:
> 2006/11/21, Tim Ellison <t.p.ellison@gmail.com>:
> > Evgueni Brevnov wrote:
> > > On 11/21/06, Geir Magnusson Jr. <geir@pobox.com> wrote:
> > >>
> > >> Evgueni Brevnov wrote:
> > >> >
> > >> > As it was discussed earlier (and I think agreed) the System.exit()
> > >> > should terminate entire process the VM is running in right after it
> > >> > executed shutdown hooks and finalizes.
> > >>
> > >> I don't think so.  How could you embed the VM in another program?
> > >
> > > My initial understanding was that System.exit() shouldn't terminate
> > > the process. But the experiments proved the opposite. AFAIU if you
> > > want to embed the application then it should not call System.exit().
> >
> > I was surprised to see the results of you experiment too -- I'd have
> > failed that Java pop-quiz question!
> >
> > > I don't see any problems to extend the proposal to the case of
> > > System.exit() so that the process will not be stopped. But, do we want
> > > such incompatibility with RI?
> >
> > No, we can't change that -- if people expect the program to exit() it we
> > will see hangs everywhere.  As somebody (I forget) wrote at the time, it
> > becomes the responsibility of the app to set the security policy to
> > disallow exit() if they expect the Process to live on.
>
> Policy would not help here actually, javadoc for
> java.lang.RuntimePermission says:
> "The "exitVM.*" permission is automatically granted to all code loaded
> from the application class path, thus enabling applications to
> terminate themselves."
> And normally it is hardly possible to bypass the default system
> classloader, one need to hack standard classloading delegation
> mechanism.

Is there any way to influence default policy?

>
> >
> > Regards,
> > Tim
> >
> > --
> >
> > Tim Ellison (t.p.ellison@gmail.com)
> > IBM Java technology centre, UK.
> >
>

Mime
View raw message