Perform Quit script on Windows Shutdown,Restart, Sign-out (basically anything that maybe 'quit forces')

Is there a way to perform DB delete just before Windows Shutdowns... and the user has the AppDesigner app running?

The Task is to remove a lock inserted into DB table, yet {OnCleanup() (partially tested)} or closeRequest are never called in this situation.

• Also here [Quit Func], it says that "quit force bypasses finish.m and terminates MATLAB. Use this syntax to override the finish script if the script does not let you quit.". [Finish Script] will not work, I suppose.
• Do you have any suggests or work around in this case?

Answer 1

[Bereketab Gulai]

The answer is that onCleanup() works perfectly on these conditions.

• A public variable onCleanupArray on the app stores all the onCleanUp(s).
• Since, the db instance is persistent type and other variables from the app cannot be accessed in the cleanUp, except if it is a local variable (dbNo) and is passed to the cleanup (cleanUpTasks) function can be accessed.
• Here, the cleanUpTasks gets the persistent db value and executes to remove the insert.

app.onCleanupArray{1} = onCleanup(@()cleanUpTasks(dbNo));

For other example how it used, such as in Window Management:

function openWindow(winM, newWindow, varargin)
     % varargin{1}: must be of type "matlab.apps.AppBase"
     slot = nextSlot(winM);
     winM.subwindows{slot} = newWindow;
     
     % Technique to delete subwindow on parent deletion
     % This method came about with problems of MATLAB not executing
     % closeRequest callback in emergency/force quit 
     if ~isempty(varargin)
         parentAppObj = varargin{1};
         % onCleanupArray: must be public variable added to windows 
         % making this call
         parentAppObj.onCleanupArray{end+1} = onCleanup(@()delete(winM.subwindows{slot}));
     end
end