def tick(self):
"""Run a tick, that is one iteration of the scheduler.
Executes all due tasks.
"""
# need to grab all data (might have been updated) from schedule DB.
# we need to merge it with whatever schedule was set in config, and
# already installed default tasks
try:
s = self.all_as_schedule()
self.merge_inplace(s)
except Exception as exc:
logger.error(
"Exception when getting tasks from {url} : {exc}".format(
url=self.schedule_url, exc=exc))
# TODO : atomic merge : be able to cancel it if there s a problem
raise
# displaying the schedule we got from redis
logger.debug("DB schedule : {0}".format(self.schedule))
if celery.__version__ > "4":
if self.heap_to_none or not self._heap:
self.logger.debug("set heap to none")
self._heap = None
self.heap_to_none = False
# this will call self.maybe_due() to check if any entry is due.
return super(RedisScheduler, self).tick()
def check_connection(self):
try:
self.cursor.execute("SELECT VERSION()")
results = self.cursor.fetchone()
# Check if anything at all is returned
if results:
return True
else:
logger.error("Error to execute query")
self.__init__()
return False
except MySQLdb.Error:
logger.error("Error in connection")
self.__init__()
return False
def sync(self):
if not self.save_entry_back:
logger.info('Without save entry back to redis...')
return
logger.info('Writing modified entries...')
_tried = set()
try:
while self._dirty:
name = self._dirty.pop()
_tried.add(name)
# Saving the entry back into Redis DB.
try:
self.rdb.set(name, self.schedule[name].jsondump())
except KeyError:
logger.warning("rdb key %s may be already removed." % name)
except Exception as exc:
# retry later
self._dirty |= _tried
logger.error('Error while sync: %r', exc, exc_info=1)
def die(self, msg):
logger.error("*** ERROR *** " + msg)
self._errmsg = msg
self._errors = True
self.exit()
def die(self, msg):
logger.error("*** ERROR *** " + msg)
self._errmsg = msg
self._errors = True
self.exit()
def invalid(workout_id):
page_template = 'invalid_workout.html'
logger.error(f'/invalid/{workout_id}')
return render_template(page_template)