Re: Several Questions
Re: Several Questions
- Subject: Re: Several Questions
- From: Ammar Ibrahim <email@hidden>
- Date: Sun, 31 May 2009 09:18:22 +0300
But my app is a "normal" Cocoa App, it's not a daemon or an agent.
On Sun, May 31, 2009 at 6:16 AM, Chris Hanson <email@hidden> wrote:
> The best way to ensure your daemon or agent is always running is to have it
> run via launchd.
>
> Start by reading the launchd man page and the "Daemons and Agents" tech
> note; these will give you an overview of how Mac OS X used launchd to manage
> these types of on-demand and always-on services.
>
> -- Chris
>
>
> On May 30, 2009, at 5:57 PM, Ammar Ibrahim <email@hidden>
> wrote:
>
> On Sun, May 31, 2009 at 3:27 AM, Kyle Sluder <email@hidden>
>> wrote:
>>
>> On Sat, May 30, 2009 at 5:20 PM, Ammar Ibrahim <email@hidden>
>>> wrote:
>>>
>>>> 1- How do you ensure only one instance of your app is running? How do
>>>> you
>>>> detect if it stops responding? Can you restart it using something like a
>>>> watchdog? And how would you go about implementing it?
>>>>
>>>
>>> The system already does this for you. Unless you're not writing a
>>> regular application (say, a daemon or something), or you only want one
>>> instance regardless of how many people are logged in on the machine
>>> (say, using Fast User Switching). If you need to ask this question,
>>> you're probably not in either of these scenarios, so don't worry about
>>> it.
>>>
>>>
>> Actually, I'm writing a non regular application, and it's for a controlled
>> environment. No users will be using the system, it should be completely
>> automated and recover from errors. All I need is to make sure my app is
>> running at all times. Would a simple cronjob check do the trick? The only
>> thing I dont know how to do at the moment is to check if the app is not
>> responding, and force quit it from an external script/app
>>
>>
>>
>>>
>>> 2- Is there a way to launch applications like iTunes from cocoa without
>>>>
>>> the
>>>
>>>> need to use AppleScript?
>>>>
>>>
>>> Look at the NSWorkspace documentation. iTunes's bundle identifier is
>>> com.apple.iTunes, but in general you can look at any app bundle's
>>> Info.plist file to get its bundle identifier (the CFBundleIdentifier
>>> key).
>>>
>>
>>
>>
>> Thanks, I did and it did the trick. One question though, it seems the call
>> returns before the app is launched, what's the best way to detect when the
>> app is launched? I heard there's something called notification center or
>> so.
>> Is there a way to view all notifications being sent on my Mac?
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