[maemo-developers] How to avoid hildon apps being launched multiple times

From: Zhu, Peter J peter.j.zhu at intel.com
Date: Wed Aug 15 20:15:09 EEST 2007
Hi Eero,

I figured out. If for lauching, no need to call osso_init() in
application. Just adding X-Osso-Service and create a correct dbus
service file with Name being com.nokia.entry_of_X-Osso-Service is

But, I'm not sure what you mean "callbacks if you are handling file open
messages". can you explain more?

Thank you very much.


Eero Tamminen wrote:
> Hi,
> ext Zhu, Peter J wrote:
>> You mean all what applications need to do is
>>     define a dbus servie file
>>     Add a X-Osso-Service field to index that dbus file in Desktop
>>     file Call osso_init() at initializaion()
>> ??
> That's about enough for launching, but you of course need some
> callbacks if you're handling also file open messages.  I'm not
> sure how well doing that is documented at Maemo site.  Anybody?
> 	- Eero
>> -Peter
>> Eero Tamminen wrote:
>>> Hi,
>>> ext Zhu, Peter J wrote:
>>>> Is there existing general framework or method in maemo/hildon so
>>>> that application won't be launched more than once even if it's
>>>> clicked multiple times from menu? Here I want a general and
>>>> elegant way rather than for example judge if it's in ps list.
>>> Yes, applications are sent D-BUS messages (e.g. to ask them to open
>>> a file) with an auto-activation flag set.  This way neither app
>>> needs to care whether the other is running or not.  Libosso has
>>> wrappers for this. 
>>> 	- Eero

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