[gentoo-user] Setting Java VM for just one program

[gentoo-user] Setting Java VM for just one program

[Willie WY Wong]

Hi list, 

Is there a way to set the Java VM based on program? 

For the most part I would like to keep icedtea-bin-7 as my system VM,
but there is one program (jabref-2.6) which doesn't run well with
java-7, but works fine with icedtea-bin-6. 

Is there a "Gentoo" way of setting this? 

Thanks, 

Willie
-- 
Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire 
         et vice versa   ~~~  I. Newton

Re: [gentoo-user] Setting Java VM for just one program

[András Csányi]

On 23 February 2012 21:13, Willie WY Wong <wongwwy@member.ams.org> wrote:
> Hi list,
>
> Is there a way to set the Java VM based on program?
>
> For the most part I would like to keep icedtea-bin-7 as my system VM,
> but there is one program (jabref-2.6) which doesn't run well with
> java-7, but works fine with icedtea-bin-6.
>
> Is there a "Gentoo" way of setting this?

I don't think there would be a way to achieve this. I think, there is
a way to set the java vm for your application when you start it. You
can create an alias to handle easier the program starting, for
example.

-- 
- -
--  Csanyi Andras (Sayusi Ando)  -- http://sayusi.hu --
http://facebook.com/andras.csanyi
--  ""Trust in God and keep your gunpowder dry!" - Cromwell

Re: [gentoo-user] Setting Java VM for just one program

[Willie WY Wong]

On Thu, Feb 23, 2012 at 09:26:56PM +0100, Penguin Lover András Csányi squawked:
> On 23 February 2012 21:13, Willie WY Wong <wongwwy@member.ams.org> wrote:
> > Hi list,
> >
> > Is there a way to set the Java VM based on program?
> >
> > For the most part I would like to keep icedtea-bin-7 as my system VM,
> > but there is one program (jabref-2.6) which doesn't run well with
> > java-7, but works fine with icedtea-bin-6.
> >
> > Is there a "Gentoo" way of setting this?
> 
> I don't think there would be a way to achieve this. I think, there is
> a way to set the java vm for your application when you start it. You
> can create an alias to handle easier the program starting, for
> example.
> 

I just realised that /usr/bin/jabref is a bash script, which says

---------------
gjl_package=jabref
gjl_main="net.sf.jabref.JabRef"
source /usr/share/java-config-2/launcher/launcher.bash
---------------

and launcher.bash contains the lines

---snip-------
# Source package env
# ---------------------
gjl_user_env="${HOME}/.gentoo/java-config-2/launcher.d/${gjl_package}"
gjl_system_env="/etc/java-config-2/launcher.d/${gjl_package}"
if [[ -f "${gjl_user_env}" ]]; then
        source "${gjl_user_env}"
elif [[ -f "${gjl_system_env}" ]]; then
        source "${gjl_system_env}"
fi
---end snip---

which makes me suspect that there is a way to give per-package
specifications. Is there documented anywhere? 

Cheers, 
W
-- 
Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire 
         et vice versa   ~~~  I. Newton