Obj-C and Background/Daemon Application Question
-
Hello,
I'm looking for more information on how to create a Background/Daemon
application. I've been learning Obj-C and I really like it. I have
bought what books I can on the subject but none of them really cover
this subject.
I have written a few tools for myself but now I want to step it up and
develop a Background/Daemon tool which should run when the system boot
til it shuts down.
I have looked at Apple's dev site and at the examples but it feels
like this is a subject area that they do not cover. So any info sites,
example code or what every that could help would be great.
Thanks,
tom -
These might help
http://developer.apple.com/macosx/launchd.html
http://www.codepoetry.net/products/launchdeditor
/Edward
On 16 feb 2008, at 22.07, Tom Jones wrote:> Hello,
> I'm looking for more information on how to create a Background/
> Daemon application. I've been learning Obj-C and I really like it. I
> have bought what books I can on the subject but none of them really
> cover this subject.
>
> I have written a few tools for myself but now I want to step it up
> and develop a Background/Daemon tool which should run when the
> system boot til it shuts down.
>
> I have looked at Apple's dev site and at the examples but it feels
> like this is a subject area that they do not cover. So any info
> sites, example code or what every that could help would be great.
>
> Thanks,
> tom
> _______________________________________________
> MacOSX-dev mailing list
> <MacOSX-dev...>
> http://www.omnigroup.com/mailman/listinfo/macosx-dev -
On Feb 16, 2008, at 1:07 PM, Tom Jones wrote:> I'm looking for more information on how to create a Background/
> Daemon application. I've been learning Obj-C and I really like it. I
> have bought what books I can on the subject but none of them really
> cover this subject.
"Advanced Mac OS X Programming" does, though I'm not sure how much
things have changed in Leopard for the launchd stuff:
http://bignerdranch.com/products.shtml
- Scott -
> From: Tom Jones <tjones...>The following Daemons and Agents technical note might provide you with a
>
> I'm looking for more information on how to create a Background/Daemon
> application. I've been learning Obj-C and I really like it. I have
> bought what books I can on the subject but none of them really cover
> this subject.
>
starting point:
http://developer.apple.com/technotes/tn2005/tn2083.html
Objective C and Cocoa stuff usually doesn't run as an agent; Cocoa isn't
considered appropriate.
You can see Cocoa used to build a UI tool to control the daemon or agent. -
On Feb 17, 2008, at 2:11 PM, Stephen Hoffman wrote:>
>> From: Tom Jones <tjones...>
>>
>> I'm looking for more information on how to create a Background/
>> Daemon application. I've been learning Obj-C and I really like it.
>> I have bought what books I can on the subject but none of them
>> really cover this subject.
>>
> The following Daemons and Agents technical note might provide you
> with a starting point:
>
> http://developer.apple.com/technotes/tn2005/tn2083.html
>
> Objective C and Cocoa stuff usually doesn't run as an agent; Cocoa
> isn't considered appropriate.
>
Why is that? I have done plenty of things in Cocoa (no AppKit) that
run as daemons or background tasks. What is inappropriate about it?
Chad> You can see Cocoa used to build a UI tool to control the daemon or
> agent. -
On Feb 24, 2008, at 4:58 PM, objectwerks inc wrote:> Why is that? I have done plenty of things in Cocoa (no AppKit) that
> run as daemons or background tasks. What is inappropriate about it?
That's explained in that technote, see: "Living Dangerously".
j o a r -
Am 24.02.2008 um 18:32 schrieb j o a r:> On Feb 24, 2008, at 4:58 PM, objectwerks inc wrote:
>
>> Why is that? I have done plenty of things in Cocoa (no AppKit)
>> that run as daemons or background tasks. What is inappropriate
>> about it?
>
> That's explained in that technote, see: "Living Dangerously".
Foundation is explicitely marked as "daemon-safe" there.
Markus
- - - - - - - - - - - - - - - - - - -
Dipl. Ing. Markus Hitter
http://www.jump-ing.de/ -
On Feb 24, 2008, at 10:32 AM, j o a r wrote:>
> On Feb 24, 2008, at 4:58 PM, objectwerks inc wrote:
>
>> Why is that? I have done plenty of things in Cocoa (no AppKit)
>> that run as daemons or background tasks. What is inappropriate
>> about it?
>
>
> That's explained in that technote, see: "Living Dangerously".
I read "Living Dangerously" and don't recall any blanket prohibition
except connecting to the Window Server
Chad -
On Feb 24, 2008, at 10:22 PM, objectwerks inc wrote:> I read "Living Dangerously" and don't recall any blanket prohibition
> except connecting to the Window Server
If you feel that the technote is unclear, or otherwise needs to be
improved, I suggest that you file an enhancement request!
Cheers,
j o a r -
On Feb 24, 2008, at 2:22 PM, objectwerks inc wrote:>
> On Feb 24, 2008, at 10:32 AM, j o a r wrote:
>
>>
>> On Feb 24, 2008, at 4:58 PM, objectwerks inc wrote:
>>
>>> Why is that? I have done plenty of things in Cocoa (no AppKit)
>>> that run as daemons or background tasks. What is inappropriate
>>> about it?
>>
>>
>> That's explained in that technote, see: "Living Dangerously".
>
>
> I read "Living Dangerously" and don't recall any blanket prohibition
> except connecting to the Window Server
In reality, a bunch of frameworks not listed as safe (from any
language, not just ObjC) but the common denominator for most of them
seems to be "connecting to the WindowServer" [see the comment on java]
There is no prohibition on using Objective-C at all, just frameworks
that use UI or manipulate graphics, and most of which connect to the
WindowServer
Chad
