Mike, thanks for your help.
This has been resolved to my satisfaction. The multiple instances only happened when I ran from different copies of my app. If you run from the same copy it doesn't happen.
--Daniel
----------------------------------------
> CC: email@hidden
> From: email@hidden
> Subject: Re: One instance of app running
> Date: Sun, 14 Jan 2007 04:58:47 +0100
> To: email@hidden
>
> Am 13.01.2007 um 21:00 schrieb Daniel Birns <email@hidden>:
>
> > All,
> >
> > I need to ensure that there's only one instance of my app running.
>
> Worldwide? In a LAN? On the machine? In one user context?
>
> It makes a difference because you can have multiple users log in to
> the machine at the same time and each one of them can normally launch
> the same apps.
>
> So what is the reason you only want a single instance of your app?
>
> Depending on your answers you could try to use some sort of lock
> which the first running instance of your app sets on launch and
> deletes on quit. But this is tricky because you need to clear the
> lock even if the app crashes or if it gets terminated by a kill -9
> signal.
>
> Or you could search for other running copies of your app using the
> bundle id or creator code. This will likely only work within one
> users session. For a mchine wide search you probably need to use some
> sort of notification system or a network based solution. Bonjour
> might help to find the other instances for example.
>
>
> > Some of this seems to happen automatically -- for example, if I
> > click on my doc-type, it starts up the app if it's not running, or
> > sends an open doc event to it if it is running. But if I click on
> > the app it starts another instance, and this is what I don't want
> > to have happen. Instead, I'd like it to turn into a reopen apple
> > event to the existing instance.
>
> Others have already commented on these points.
>
>
> HTH
> Mike
> --
> Mike Fischer Softwareentwicklung, EDV-Beratung
> Schulung, Vertrieb
> Note: I read this list in digest mode!
> Send me a private copy for faster responses.
>
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