On Mon, Jun 17, 2013 at 10:02 AM, Michael Zanetti <[email protected]> wrote: > On Monday 17 June 2013 07:43:26 Thomas Voß wrote: >> thanks for bringing this up. Upstart user session will take care of >> single application instances and integrates with AppArmor to implement >> our confinement strategy (for >= saucy). The interesting feature from >> my pov is the accelerated application startup. Is that relying on >> preloading specific symbols? > > Yes, Its preloading all the Qt and libmeegotouch stuff. > > Basically instead of launching your app normally, you give it as an argument > to a the so called invoker (/usr/bin/invoker) which has all the common stuff > already loaded and forks to your application.
Ack, here is where the upstart-launcher would come into play. > Additionally, they've introduced an own QApplication class with some better > tuned caching. Instead of creating a QApplication like you would do with > standard Qt, you use this > > QApplication *app = MDeclarativeCache::qApplication(argc, argv); > > to create a new QApplication. I don't exactly know the details what they do > inside that MDeclarativeCache. I guess one thing is to monitor the state of > the created QML view and make the splash screen go away when ready. > This is something we would need to investigate further. Alberto, can you take a look at MDeclarativeCache and try to summarize the benefits it provides? Thanks, Thomas > Hope this helps, > Michael > >> >> I'm CC'ing Ted and Steve explicitly on this mail as they are most >> familiar with upstart user session. >> >> Thanks, >> >> Thomas >> >> On Mon, Jun 17, 2013 at 7:33 AM, Alberto Mardegan >> >> <[email protected]> wrote: >> > Hi all! >> > >> > I'm sending this message both to ubuntu-devel and ubuntu-phone, in the >> > >> > hope of reaching the widest interested audience as possible. However, >> > please reply to ubuntu-devel only. >> > >> > I want to bring to your attention the existence of a project which IMHO >> > would be very beneficial to Ubuntu (especially on embedded devices, but >> > not >> > only): the application launcher originally developed for Maemo/MeeGo. >> > >> > In short, the main features that applauncherd bring to the system are: >> > * faster application startup >> > * support for single instance applications >> > * splash screen while the application is starting up >> > >> > The recommended readings are these: >> > http://apidocs.meego.com/1.0/mtf/launcher.html >> > http://goo.gl/DjGCV >> > >> > In order to be used in Ubuntu, the software itself needs some porting, to >> > remove the dependencies to Qt4, X11, and the AEGIS security framework used >> > in MeeGo. Luckily though, these changes have already been made by the Mer >> > people, who ported the software to Qt5, removed the AEGIS stuff and also >> > simplified a bit the architecture (there isn't an applauncherd daemon any >> > more, but the invoked directly talks to the booster processes). They also >> > wrote a booster for speeding up the startup of applications using QML >> > components, and we could easily modify that to use our Ubuntu SDK >> > components instead. >> > >> > Their code is here: >> > https://github.com/nemomobile/mapplauncherd >> > https://github.com/nemomobile/mapplauncherd-qt >> > https://github.com/nemomobile/mapplauncherd-booster-qtcomponents >> > >> > Please let me know what you think of this. IMHO it's a simple and >> > brilliant >> > idea, it could be integrated with apparmor and also be used to provide >> > sane >> > default callbacks for handling the application lifetime state changes. >> > >> > I've never been directly involved in this project, but given how much I >> > dislike NIH, I'd be happy to collaborate with whoever wants to bring this >> > to Ubuntu. >> > >> > Ciao, >> > >> > Alberto >> > >> > -- >> > Mailing list: https://launchpad.net/~ubuntu-phone >> > Post to : [email protected] >> > Unsubscribe : https://launchpad.net/~ubuntu-phone >> > More help : https://help.launchpad.net/ListHelp -- ubuntu-devel mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
