Re: [Xen-devel] Re: xm list dropping domain?

[Tim Freeman <tfreeman@xxxxxxxxxxx>]

Thanks for the information Mike,

I supposed it was getting destroyed, hmm.  I'm making the controller
part of a grid service and the VM's are distinguished by an assigned
distinguished name which maps to a local name (so that ID #s can
change).  The controller is only dealing in local names now.  It looks
like one of the domain events is restart:

(event xend.domain.exit (gridvm1 3 reboot))
(event xend.domain.restart (gridvm1 3 schedule))
(event xend.domain.destroy (gridvm1 3))
(event xend.domain.died (gridvm1 3))
(event xend.domain.restart (gridvm1 3 begin))
(event xend.domain.create (gridvm1 3))
(event xend.domain.restart (gridvm1 3 success))
(event xend.domain.unpause (gridvm1 3))

..where "gridvm1" is the local name.  So I don't think a domain object
is necessary, couldn't I poll 8001 for any changes concerning the local
name (as long as nothing at a higher level started a domain with the
same name in that window)?.  That's pretty cool, I didn't know you could
receive the events, I thought you could only 'ask.'

That makes me think I should write a polling thread that any class could
register callbacks with?  My thinking is that the 'right way' is to
decouple any higher level functionality.  Unless I'm missing a
programming trick here..


On Tue, 5 Oct 2004 14:25:58 +0100 
Tom Wilkie <tw275@xxxxxxxxx> wrote:

> > From python you can use XendClient to call the api directly - either
> > synchronously or asynchronously. From Java you can use Jakarta commons
> > httpclient, and from C you can use libcurl (see the xfrd source in 
> > xen).
> >
> 
> I wrote a simple interface to xend in java for the high-xeno stuff.  
> Let me know if you need it, I don't think that repository is public.

Thanks, I would definitely like to take a look.  I started an http
interface, but I do need to think about all of this some more (if I
combined or made improvements I'd make that available to anyone also).

Thanks to you both for you help!

Tim



> 
> Cheers
> 
> Tom
> 
> 
> 
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