Sunday, 16 June 2013

MeeGo applauncherd: faster application startup and more

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

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