def check_new_event(self, planet_list):
"""Watch periodically for any new incoming fleet"""
fleet_observer = Observer(planet_list, self.navigate)
while True:
try:
self.mutex.acquire()
self.is_event_over = fleet_observer.check_new_event()
except Exception:
print("ERROR check_new_event")
finally:
self.mutex.release()
time.sleep(self.DELAY)
