[wildfly-dev] -Djboss.modules.system.pkgs=class1, class2 runtime equivalent

[Sam Thomas]

Cool I will look it up and get back to you if I'm stuck. Thank you for your
help David.

Thanks
./Sam


On Thu, Nov 15, 2018 at 10:55 PM David Lloyd <david.lloyd at redhat.com> wrote:

> Have a look at the static initializer of the org.jboss.modules.Module
> class.  If you extracted the computation of those two fields to a
> method, and then made the fields volatile, you would be able to
> re-call the method whenever you've updated the system property.
>
> The fields are consulted on each class lookup so changes should take
> effect immediately.
> On Thu, Nov 15, 2018 at 10:57 AM Sam Thomas <sam.thomas at broadcom.com>
> wrote:
> >
> > Hi David,
> >
> > Can you point me to that field(the class as well) that stores these
> values? I assume just changing the value(after making the field mutable) to
> include additional classes isn’t going to be enough?
> >
> > Thanks
> > ./Sam
> >
> > On Thu, Nov 15, 2018 at 8:22 PM David Lloyd <david.lloyd at redhat.com>
> wrote:
> >>
> >> On Thu, Nov 15, 2018 at 8:38 AM Sam Thomas <sam.thomas at broadcom.com>
> wrote:
> >> > Hi guys!
> >> >
> >> > When an agent starts up with the JVM (through premain()) we can
> specify in the command to start up jboss, classes to be added to jboss
> system packages by setting the above property.
> >> >
> >> > I am looking to replicate the effect of setting that system property
> after jboss has started up, i.e, an agent will be loaded through
> agentmain() after jboss is up and running.
> >>
> >> At present, these values are calculated when JBoss Modules starts up
> >> and stored in a constant field.  So to change that exact mechanism
> >> with one which can be reloaded would require that the field be made
> >> mutable and that an operation be added which recomputes that field.
> >> This is to say that it is possible, but the current code doesn't do
> >> that.
> >>
> >> --
> >> - DML
> >
> > --
> >
> > Thanks
> > ./Sam
>
>
>
> --
> - DML
>
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