DCOP broadcasting

[Waldo Bastian]

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On Monday 13 October 2003 16:51, Andras Mantia wrote:
> Hi,
> 
>  Is it possible to do broadcasting with DCOP? I mean I would like to call
> a
 DCOP function of all running instances of an application even if the
> instances are run in different sessions. For example I have the "myapp"
> which registers itself every time as "myapp-PID". The
> myapp::myappIF:openedFile() returns let's say the file opened by the
> current instance in myapp. Now I would like to query all the running myapps
> and find the opened files. Is it possible to do this with DCOP?

DCOP supports broadcasts but it doesn't support replies to broadcasts. You may 
wish to use "dcopFind" which makes calls to different clients/objects till it 
finds one that replies with a positive acknowledgement. That's useful if you 
try to solve "find if any instance has file foobar open".

As far as sessions go. The DCOP address space is limited to a single session. 
There is some support for multiple sessions hacked into the dcop command line 
tool. 

If you want to prevent concurrent access to files you should be using a file-
locking mechanism and not DCOP. See e.g. http://www.cs.helsinki.fi/linux/
linux-kernel/2001-41/0633.html

Cheers,
Waldo
- -- 
bastian at kde.org -=|[ SUSE, The Linux Desktop Experts ]|=- bastian at suse.com
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