Please also see: https://blueprints.launchpad.net/ubuntu/+spec/client-1303-add-app-model-and-lifecycle-to-platform-api
and the linked documents for further details. Thomas On Wed, Aug 14, 2013 at 10:33 AM, Thomas Voß <thomas.v...@canonical.com> wrote: > The state of an application is transparent to the user. Behind the > scenes, the system can decide to stop/kill non-focused apps at its own > discretion. Whenever the system alters the state of an app to "not > running" it offers an archive such that the app can persist its state. > With that, a user ideally never realizes that an app has been stopped > or killed. > > Thomas > > > > On Wed, Aug 14, 2013 at 10:08 AM, Tobias Havla <tbha...@gmail.com> wrote: >> On 14.08.2013 10:04, Thomas Voß wrote: >>> On Wed, Aug 14, 2013 at 9:56 AM, Tobias Havla <tbha...@gmail.com> wrote: >>>> On 14.08.2013 09:54, Thomas Voß wrote: >>>>> On Wed, Aug 14, 2013 at 9:41 AM, Michael Zanetti >>>>> <michael.zane...@canonical.com> wrote: >>>>>> On Wednesday 14 August 2013 09:31:31 Daniel Holbach wrote: >>>>>>> Hello, >>>>>>> >>>>>>> On 14.08.2013 09:29, Michael Zanetti wrote: >>>>>>>> On Wednesday 14 August 2013 09:07:52 Thomas Voß wrote: >>>>>>>>> Hey Fabio, >>>>>>>>> >>>>>>>>> no, applications are not allowed to run in background. Our application >>>>>>>>> lifecycle is strict in this respect and we only guarantee focused >>>>>>>>> applications to be running. >>>>>>>> Does that mean I will have an Ubuntu Edge phone with 4GB of RAM, 8 CPU >>>>>>>> cores and cannot do multitasking on it? >>>>>>> I don't think anyone specified the phone to have 8 CPU cores - where did >>>>>>> you read that? >>>>>> Nowhere... I think you get my point... >>>>>> >>>>>>> How is "app authors can write daemons" = multitasking? >>>>>> How does this relate? Thomas said there will be no running apps in the >>>>>> background / minimzed apps, which to me means there will be no >>>>>> multitasking. >>>>>> >>>>>> >>>>> We have had this conversation multiple times in the past, and version >>>>> 1 of our application lifecycle will not allow to run arbitrary >>>>> applications in the background. Instead, we will provide selected >>>>> services to hand over to the system for certain tasks, e.g., >>>>> downloads, alarms, music playback. Please note that this is a policy >>>>> targetted towards the "mobile phone" usage scenario and swapping >>>>> policies at runtime when transitioning to different usage scenarios is >>>>> one of the primary goals of the lifecycle architecture. >>>>> >>>>> Version 2 of the lifecycle will then allow applications to run their >>>>> own background tasks, UI less, with restrictions on >>>>> CPU/Memory/resources in general. >>>>> >>>>> Thomas >>>>> >>>>>> -- >>>>>> Mailing list: https://launchpad.net/~ubuntu-phone >>>>>> Post to : ubuntu-phone@lists.launchpad.net >>>>>> Unsubscribe : https://launchpad.net/~ubuntu-phone >>>>>> More help : https://help.launchpad.net/ListHelp >>>> If Ubuntu Touch doesn't support multi task it is far behind iOS, >>>> Android, Windows Phone and Blackberry. Sorry, I thought it would be a >>>> modern system that requires a lot of power, so we can do the same things >>>> as on our PCs. >>> Okay, let's be clear here: Multitasking and application lifecycle are >>> related but distinct topics. Obviously, Ubuntu Touch will support >>> multi-tasking, but an application lifecycle architecture that allows >>> for controlling resource consumption of applications by the system is >>> sorely needed to ensure a long-running _mobile_ device. It is not >>> sufficient to assume that app authors will get it right and it is >>> important to note that users always "blame" the platform for bad >>> battery life. And that is for a good reason: It's the platform's/OS's >>> responsibility to put mechanisms in place to manage a device's >>> resources! >>> >>> Our application lifecycle policies and state machines allow us to >>> exercise this level of control for specific usage scenarios, but they >>> do not touch on general multi-tasking capabilities and we can leverage >>> the full process state spectrum to ensure a seamless operation. >>> >>> Thomas >> So can two or three applications run at the same time and other gets >> closed/suspended or can I switch between two applications only with >> reloading the application? >> We have a gesture to quick switch between apps, so if we have to reload >> apps while we are multitasking this gesture makes no sense. A good way >> would be suspending apps like Android does (/Greenify). The doesn't >> notice that and the battery life is good. -- Mailing list: https://launchpad.net/~ubuntu-phone Post to : ubuntu-phone@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-phone More help : https://help.launchpad.net/ListHelp
