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List:       kde-devel
Subject:    Re: doubt about kioslave
From:       Albert Astals Cid <aacid () kde ! org>
Date:       2012-06-12 17:56:45
Message-ID: 2407432.9BlAFXDxIz () xps
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El Dimarts, 12 de juny de 2012, a les 10:07:28, Luca Ferrari va escriure:
> Thanks for the explaination. As far as I understand a kded module is
> required to handle per-user configuration to share with all running
> slaves, but is there any tutorial or sample I can start studying from?

I know someone did that in the past but don't really remember which ioslave it 
was.

Sorry,
  Albert

> I cannot find one and the kded documentation is not so clear to me.
> 
> Thanks,
> Luca
> 
> On Mon, Jun 11, 2012 at 8:10 PM, Albert Astals Cid <aacid@kde.org> wrote:
> > El Dilluns, 11 de juny de 2012, a les 17:59:44, Luca Ferrari va escriure:
> >> Hi all,
> >> I'm making my first kioslave and I've got a doubt, as already posted
> >> here http://forum.kde.org/viewtopic.php?f=43&t=102547.
> >> My protocol has the lines:
> >> 
> >> [Protocol]
> >> exec=kio_rolefs
> >> protocol=rolefs
> >> 
> >> and my kdemain is as follows:
> >> 
> >> extern "C" int KDE_EXPORT kdemain( int argc, char **argv )
> >> {
> >>   kDebug(RoleFSDebugArea()) << "[kdemain] starting";
> >>   KComponentData instance( "kio_rolefs" );
> >> 
> >> 
> >> 
> >>   kDebug(RoleFSDebugArea()) << "kdemain is creating a slave...";
> >>   RoleFSKIOSlave slave( "Hello","Slave", instance, argv[2], argv[3] );
> >>   kDebug(RoleFSDebugArea()) << "staring the dispatch loop";
> >>   slave.dispatchLoop();
> >>   kDebug(RoleFSDebugArea()) << "kdemain] ending";
> >>   return 0;
> >> }
> >> 
> >> 
> >> So it should do nothing very special here. However, when I open
> >> dolphin (a single window) and point it to the rolefs:/// path I see in
> >> the ~/.xsession-errors log file the following messages:
> >> 
> >> unnamed app(9078)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9078)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> kio_rolefs(9078)/[RoleFS debug] kdemain: staring the dispatch loop
> >> unnamed app(9084)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9084)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> kio_rolefs(9084)/[RoleFS debug] kdemain: staring the dispatch loop
> >> unnamed app(9087)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9087)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> unnamed app(9088)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9088)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> kio_rolefs(9087)/[RoleFS debug] kdemain: staring the dispatch loop
> >> unnamed app(9089)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9089)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> kio_rolefs(9089)/[RoleFS debug] kdemain: staring the dispatch loop
> >> kio_rolefs(9088)/[RoleFS debug] kdemain: staring the dispatch loop
> >> unnamed app(9090)/[RoleFS debug] kdemain: [kdemain] starting
> >> kio_rolefs(9090)/[RoleFS debug] kdemain: kdemain is creating a slave...
> >> kio_rolefs(9090)/[RoleFS debug] kdemain: staring the dispatch loop
> >> 
> >> therefore there are processes 9078, 9084, 9087, 9088, 9089 and 9090
> >> for a total of 6 kioslaves running at the same time. The rolefs:///
> >> root path displays 3 icons, one of which contains 4 other elements.
> >> Besides this, I'd like to know when kioslave are created and how is it
> >> possible to handle a "shared" state so that if the user opens two file
> >> manager views the slaves are accessing the same underlying values
> >> (beside haveing to re-read the configuration).
> > 
> > kioslaves are by definition stateless, i.e. you can't assume anything
> > about a running instance being reused or a new one being spawned, etc. If
> > you need to keep state I think the common solution is to have a kded that
> > the slave communicates with. Also having a maxInstances of 1 might help.
> > 
> > You can have a look at
> > http://techbase.kde.org/Development/Tutorials/Debugging/Debugging_IOSlaves
> > to learn how to debug your slave.
> > 
> > Cheers,
> >  Albert
> > 
> >> Thanks,
> >> Luca
> >> 
> >> >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to
> >> >> unsubscribe
> >> >> <<
> >>> 
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