def last_run(self):
self._last_run.restat(False)
if not self._last_run.exists():
return CANARY_DATE
with self._last_run.open('r') as in_file:
date_str = in_file.read()
return datetime.strptime(date_str, self._time_format).replace(
tzinfo=tz.tzutc())
def last_run(self):
self._last_run.restat(False)
if not self._last_run.exists():
return CANARY_DATE
with self._last_run.open('r') as in_file:
date_str = in_file.read()
return datetime.strptime(date_str,
self._time_format).replace(tzinfo=tz.tzutc())
def should_run(self):
current_time = datetime.utcnow().replace(tzinfo=tz.tzutc())
next_cycle = croniter(self.schedule, self.last_run).get_next(datetime)
delta = (croniter(self.schedule, next_cycle).get_next(datetime) - next_cycle).total_seconds()
next_cycle = next_cycle + timedelta(seconds=delta * 0.1 * self._smear_coef)
if next_cycle <= current_time:
return True
return False
def should_run(self):
current_time = datetime.utcnow().replace(tzinfo=tz.tzutc())
next_cycle = croniter(self.schedule, self.last_run).get_next(datetime)
if next_cycle <= current_time:
return True
return False
yield self._mutex.acquire()
yield self._fs_lock.deferUntilLocked()
def release(self):
"""Release the filesystem based and in memory locks."""
self._fs_lock.unlock()
self._mutex.release()
@property
def locked(self):
return self._mutex.locked or self._fs_lock.locked
# We use this date to indicate that the scheduled task has never run.
# Easter egg, try to see what is special about this date :)?
CANARY_DATE = datetime(1957, 10, 4, tzinfo=tz.tzutc())
class DidNotRun(Exception):
pass
class ScheduledTask(object):
"""
Two ScheduledTask instances with same identifier are not permited to run
concurrently. There should be no ScheduledTask queue waiting for the lock
as SchedulerService ticks quite often.
"""
_time_format = "%Y-%m-%dT%H:%M:%SZ"
schedule = None
identifier = None
def acquire(self):
yield self._mutex.acquire()
yield self._fs_lock.deferUntilLocked()
def release(self):
"""Release the filesystem based and in memory locks."""
self._fs_lock.unlock()
self._mutex.release()
@property
def locked(self):
return self._mutex.locked or self._fs_lock.locked
# We use this date to indicate that the scheduled task has never run.
# Easter egg, try to see what is special about this date :)?
CANARY_DATE = datetime(1957, 10, 4, tzinfo=tz.tzutc())
class DidNotRun(Exception):
pass
class ScheduledTask(object):
"""
Two ScheduledTask instances with same identifier are not permited to run
concurrently. There should be no ScheduledTask queue waiting for the lock
as SchedulerService ticks quite often.
"""
_time_format = "%Y-%m-%dT%H:%M:%SZ"
schedule = None
identifier = None
def should_run(self):
current_time = datetime.utcnow().replace(tzinfo=tz.tzutc())
next_cycle = croniter(self.schedule, self.last_run).get_next(datetime)
if next_cycle <= current_time:
return True
return False
