touch-packages team mailing list archive

[Zsombor Egri <1447566@xxxxxxxxxxxxxxxxxx>]

StateSaver discards the saved states on SIGTERM. This has been agreed long ago when we stabilised the StateSaver requirements:
- states are saved every time the app goes background (inactive)
- SIGINT keeps the states saved
- SIGTERM, quit() clears the state data, as well as when the app comes foreground

So donate assume states being saved when SIGTERM comes. This was like
this since 1.0, so we cannot break that.

We can however expose an interface to apps so they can save whatever
they want. Any other signals we should listen on?

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https://bugs.launchpad.net/bugs/1447566

Title:
  Need to expose API to notify about user closing the app

Status in ubuntu-ui-toolkit package in Ubuntu:
  Confirmed

Bug description:
  Apps currently have no way to "clean up" when a user closes them
  (swipes an app away in the right-edge switcher).

  It'd be useful to expose a signal that the app can subscribe to to
  handle SIGTERM that's sent to it by upstart. The app should not exit
  until the signal handler returns. Initially we'll rely on upstart to
  SIGKILL the app after a timeout, but later we'll need to implement a
  way for the app to suppress that if e.g. it needs to ask the user what
  to do with unsaved data.

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