Exemplo n.º 1
0
 def scheduler_loop(self, interval=60):
     now = datetime.now()
     while not self.stopped():
         
         event_schedules = get_relevant_schedules(now)
         for schedule in event_schedules:
             try:
                 # call the callback function
                 # possibly passing in args and kwargs
                 schedule.run(self._router)
             except Exception, e:
                 # Don't prevent exceptions from killing the thread
                 exc_type, exc_value, exc_traceback = sys.exc_info()
                 stacktrace = traceback.extract_tb(exc_traceback)
                 self._router.error("Problem in scheduler for: %s. %s\n\nTRACEBACK: %s" % (schedule,
                                                                                           e.message, 
                                                                                           stacktrace))
                 
         if self._speedup is not None: # debugging/testing only!
             now = now + self._speedup
             time.sleep(1)
         else: 
             next_run = now + timedelta(seconds=interval)
             updated_now = datetime.now()
             while updated_now < next_run:
                 # we add another second since system time runs at microsecond accuracy
                 # whereas python time is only second accuracy
                 time.sleep((next_run - updated_now + timedelta(seconds=1)).seconds)
                 updated_now = datetime.now()
             now = next_run
Exemplo n.º 2
0
def scheduler_heartbeat():
    """
    Check all scheduled tasks and run whatever is necessary.
    """
    # this should get called every minute by celery
    failures = []
    currtime = datetime.utcnow()
    relevant = get_relevant_schedules(currtime)
    for schedule in relevant:
        try:
            # call the callback function
            # possibly passing in args and kwargs
            schedule.run(currtime)
        except Exception, e:
            # Don't prevent exceptions from killing the rest
            logging.exception("Problem in the scheduler heartbeat for %s" % schedule)
            failures.append(e)