[vbox-dev] ISession lock/unlock problems

[Andrea Turli]

So I'm trying to lauch/stop vm but also modify the vm definition.

My question was
Is it possible that IMachine.getSessionState() and ISession.getState() are
not
always in sync?
Is there a way to ensure that the ISession ::state is effectively Unlocked
before another methods tries to use it? Can I loop on the ISession::state
until the ISession is Unlocked for
all, and how?

Thanks,
Andrea

On Tue, Mar 27, 2012 at 3:23 PM, Klaus Espenlaub <klaus.espenlaub at oracle.com
> wrote:

> On 25.03.2012 18:42, Andrea Turli wrote:
> > Hi,
> >
> > I'm trying to implement a java client able to interact with Vbox API.
> >
> > Reading the documentation I've found this document
> >
> https://www.virtualbox.org/sdkref/interface_i_machine.html#5f6e112de89f7e1d300738c9a055d5c9
> > where it is said explicity:
> > "The caller must eventually release the session's shared lock by
> > calling ISession::unlockMachine on the local session object once this
> > call has returned. However, the session's state (see ISession::state)
> > will not return to "Unlocked" until the remote session has also
> > unlocked the machine (i.e. the machine has stopped running)."
> >
> > In fact IMachine.getSessionState() and ISession.getState() are not
> > always in sync. Is there a way to ensure that the ISession ::state is
> > effectively Unlocked before another methods tries to use it?
> > Can I loop on the ISession::state until the ISession is Unlocked for
> > all, and how?
>
> What's the problem you're trying to solve? It's a bit difficult to
> answer a question you didn't ask.
>
> Are you launching a VM, or are you trying to make changes to the
> settings of a running VM? Quite different cases when it comes to sessions.
>
> Klaus
>
> >
> > Thank you,
> > Andrea
> >
> >
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>
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> Dr. Klaus Espenlaub | Snr. Manager Software Development Desktop
> Virtualization
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> Oracle VM VirtualBox
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