On 14.09.2010 19:44, DavidW wrote:
Sounds good, maybe the email should set to make "reply all" work for this
way.
"reply all" does work - but it means you need to use the right reply
function in the mail client. Due to many requests some time ago we
disabled the "reply to mailing list". Just FYI.
-----Original Message-----
From: Klaus Espenlaub [mailto:[email protected]]
Sent: Tuesday, September 14, 2010 2:33 AM
To: DavidW
Subject: Re: [vbox-dev] Session problem when start two virtual machines
together
Please stay on the mailing list for such issues. I'm ignoring personal
mails which would help others if they'd be discussed in public.
Klaus
On 13.09.2010 20:16, DavidW wrote:
Does that mean ISession_close is not much useful, you could close session
when there is activity in the session, and when you open the session
again,
you still have what you had before you close the session, in this case the
openremotesession progress.
I thought IWebsessionManager is like a login. So it doesn't work like a OS
login, where you can login once and do things on all objects and then
close
it.
It is like a login, and each session needs to be authenticated
individually. The SDK docs describe this pretty clearly (and the next
major version will be even more verbose).
You can find the SDK docs for the current release on the VirtualBox
website, http://www.virtualbox.org/wiki/Technical_documentation
Is the right way that I should have one IWebsessionManager for each VM,
for
all its cycle, from create to destroy. If I get a new IWebsessionManager
and
get the session object in it to manipulate a VM, I could have same
problem,
right? In this case, I could have one IWebsessionManager and
openremotesession on the VM, then I close the session even the progress is
not done, then after 1 second for example, If I open another
IWebsessionManager and try to access the VM, I could have conflict
problem?
Correct, you need to use the right ISession reference throughout. If you
search for inspiration how this is used in bigger applications it might
be a good idea e.g. to have a look at phpvirtualbox.
Should I create IWebsessionManager for each VM and store the Session
somewhere and use it until the VM is destroyed?
That's how it's described in the SDK docs (actually it describes keeping
the IWebsessionManager reference around, but that's the same thing since
you can always invoke the getSessionObject method and for the same mgr
it always returns the same session as you observed). Since
IWebsessionManager instances are local objects in the client they're
quite cheap.
Klaus
-----Original Message-----
From: Klaus Espenlaub [mailto:[email protected]]
Sent: Monday, September 13, 2010 4:50 AM
To: DavidW
Subject: Re: [vbox-dev] Session problem when start two virtual machines
together
On 13.09.2010 02:05, DavidW wrote:
To start two virtual machines which are in "savedstate", I want to use
webservice to start them together, not one after another. Since
openRemoteSession returns immediately with a iprogress object, I think I
just need call openRemoteSession on both virtual machines and then wait
for them. But I got "The given session is already open or being opened"
when I trid to openRemoteSession on the second VM. See below, any idea
why it gave that error? Is it reasonable the session id in step 1 and
step 4 are the same? What should I do to make it work? Thanks.
Your code needs 2 sessions, however you use one session for two jobs.
Each IWebsessionManager instance holds exactly one session object, and
thus two calls to getSessionObject will return the same object id.
So you need to logon twice to have two sessions in parallel, use the
appropriate IWebsessionManager instance for each job and so on.
The behavior you observe is exactly as expected.
Klaus
1,IWebsessionManager_getSessionObject - return session id -
452ad4c9d2537d44-0000000000046209
2,IVirtualBox_openRemoteSession - on vm 1
n Keep the returned iprogress
3,ISession_close
4,IWebsessionManager_getSessionObject - return session id -
452ad4c9d2537d44-0000000000046209
5,IVirtualBox_openRemoteSession - on vm 2 - got"The given session is
already open or being opened"
n Keep the returned iprogress
6,ISession_close
7,waitForCompletion on iprogress 1
8,waitForCompletion on iprogress 2
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