def __init__(self):
super().__init__()
self._loop = None # type: asyncio.AbstractEventLoop
self._control = ControlManager()
self._control_server = ControlServer(self._control, None)
self._stopping = False
def run_daemon(_):
with closing(asyncio.get_event_loop()) as loop:
loop.run_until_complete(check_daemon_absence())
control = ControlManager()
loop.run_until_complete(control.start())
try:
control.load_state()
except Exception as err:
logging.warning('Failed to load program state: %r', err)
control.invoke_state_dumps()
stopping = False
def stop_daemon(server: ControlServer):
nonlocal stopping
if stopping:
return
stopping = True
stop_task = asyncio.ensure_future(asyncio.wait([server.stop(), server.control.stop()]))
stop_task.add_done_callback(lambda fut: loop.stop())
control_server = ControlServer(control, stop_daemon)
loop.run_until_complete(control_server.start())
if os.name == 'posix':
for sig in (signal.SIGINT, signal.SIGTERM):
loop.add_signal_handler(sig, partial(stop_daemon, control_server))
loop.run_forever()
def stop_daemon(server: ControlServer):
nonlocal stopping
if stopping:
return
stopping = True
stop_task = asyncio.ensure_future(asyncio.wait([server.stop(), server.control.stop()]))
stop_task.add_done_callback(lambda fut: loop.stop())
class ControlManagerThread(QThread):
error_happened = pyqtSignal(str, Exception)
def __init__(self):
super().__init__()
self._loop = None # type: asyncio.AbstractEventLoop
self._control = ControlManager()
self._control_server = ControlServer(self._control, None)
self._stopping = False
@property
def loop(self) -> asyncio.AbstractEventLoop:
return self._loop
@property
def control(self) -> ControlManager:
return self._control
def run(self):
self._loop = asyncio.new_event_loop()
asyncio.set_event_loop(self._loop)
with closing(self._loop):
self._loop.run_until_complete(self._control.start())
self._loop.run_until_complete(self._control_server.start())
try:
self._control.load_state()
except Exception as err:
self.error_happened.emit('Failed to load program state', err)
self._control.invoke_state_dumps()
self._loop.run_forever()
def stop(self):
if self._stopping:
return
self._stopping = True
stop_fut = asyncio.run_coroutine_threadsafe(asyncio.wait([self._control_server.stop(), self._control.stop()]),
self._loop)
stop_fut.add_done_callback(lambda fut: self._loop.stop())
self.wait()