React on crash of subprocess about bulletproof-arma-launcher HOT 5 CLOSED

Original comment by The Sighter (Bitbucket: sighter, GitHub: sighter):

As mentioned in various emails the following applies to errorhandling:

• If the application main thread raises and uncatched exception, it is fetched and shown via popup, as long _EXC_POPUP = True is set in the settings class
• if another process raises a exception, which is true if you are inside a para execution, then you have to catch exceptions there and then reject the para. (You can rethrow the exception from the reject handler then or take appropriate actions, to treat the error)

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Original comment by The Sighter (Bitbucket: sighter, GitHub: sighter):

Its basically done. I can further improve this by the following.

The para can install the decorator on the function which was passed into it. Then the all exceptions are catched. After that the decorator can re- raise the exception which gets then catched by the default exception handler (popup or console).

Edit
Exception handling via popup can be enabled by setting

self.settings_data.exc_popup = False

to True in the utils.settings.Settings class

Edit: the code above does not apply anymore

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Original comment by The Sighter (Bitbucket: sighter, GitHub: sighter):

Asuming there is one parent-process (kivy-main-process) and one child process (syncer) and they are comunicating via an connection object (old messagequeue. Its a connection now, i changed it) then there are 2 basic cases.

• Child knows, that there was an error. In this case the child has to call the reject(reason) method on the connection object. Reason must be a dictionary with an error msg. Use "msg" as key here.
• Child just terminates unprepared. The parent process can check if the child is still alive. If not it has to join the dead process
  to kill all connections. Additionally i probably will provide an decorator which can wrap an async function, catches all
  exceptions and reject the para and sends the stacktrace over the connection.

Notes

• see here for getting the stacktrace http://seasonofcode.com/posts/python-multiprocessing-and-exceptions.html
• error popup can be done via http://kivy.org/docs/api-kivy.uix.popup.html

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Original comment by overfl0 (Bitbucket: overfl0, GitHub: overfl0):

Yup :)

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Original comment by The Sighter (Bitbucket: sighter, GitHub: sighter):

Thats a good one. U back mate?

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