def initialize(self):
"""Initialize croniter and related times"""
if self.croniter is None:
self.time = time.time()
self.datetime = datetime.now(dateutil.tz.tzlocal())
self.loop_time = self.loop.time()
self.croniter = croniter(self.spec, start_time=self.datetime)
def wrapper(*args, **kwargs):
LOGGER.info('timer started: for %(func)s to run every %(crontab_expression)s', {
'func': func,
'crontab_expression': self.crontab_expression
})
while True:
now = get_current_timestamp()
# TODO: remove croniter hack when croniter is fixed
# next_run = croniter(self.crontab_expression, now).get_next()
ct = croniter(self.crontab_expression, now + DEFAULT_CLIENT_TIMEZONE.utcoffset(datetime.now()).total_seconds())
next_run = ct.get_next(ret_type=float) - DEFAULT_CLIENT_TIMEZONE.utcoffset(datetime.now()).total_seconds()
delta = next_run - now
LOGGER.info('timer sleep: wake up after %(delta)s seconds', {
'delta': delta
})
time.sleep(delta)
LOGGER.info('timer woke up')
before = time.time()
try:
func(*args, **kwargs)
finally:
after = time.time()
LOGGER.info('timer work done: in %(elapsed_time)s seconds', {
'elapsed_time': after - before
})
def runCron(self, cron: str) -> timedFuncWrap:
return self.addTimed(
croniter(
cron,
start_time=datetime.today(),
ret_type=datetime,
))
def initialize(self):
"""Initialize croniter and related times"""
if self.croniter is None:
self.time = time.time()
self.datetime = datetime.now(dateutil.tz.tzlocal())
self.loop_time = self.loop.time()
self.croniter = croniter(self.spec, start_time=self.datetime)
def initialize(self):
"""Initialize croniter and related times"""
if self.croniter is None:
self.time = time.time()
self.datetime = datetime.now(self.tz)
# 返回当前时间，一个float值，根据事件循环的内部时钟。
self.loop_time = self.loop.time()
self.croniter = croniter(self.spec, start_time=self.datetime)
def _update_next_trigger_at(self):
"""
Defines next backup creation time
"""
base_time = django_timezone.now().replace(
tzinfo=pytz.timezone(self.timezone))
self.next_trigger_at = croniter(self.schedule,
base_time).get_next(datetime)
def secs_for_next(cron_format: str, tz: tzinfo = None) -> float:
now_ts = time.time()
# If we have a tz object we'll make now timezone aware, and
# if not will set now to be the current timestamp (tz
# unaware)
# If we have tz, now will be a datetime, if not an integer
now = tz and datetime.now(tz) or now_ts
cron_it = croniter(cron_format, start_time=now)
return cron_it.get_next(float) - now_ts
def secs_for_next(cron_format: str, tz: tzinfo = None) -> float:
"""Return seconds until next execution given crontab style format."""
now_ts = time.time()
# If we have a tz object we'll make now timezone aware, and
# if not will set now to be the current timestamp (tz
# unaware)
# If we have tz, now will be a datetime, if not an integer
now = datetime.now(tz) if tz else now_ts
cron_it = croniter(cron_format, start_time=now)
return cron_it.get_next(float) - now_ts
def cron_string_to_next_datetime(minute="*", hour="*", day_of_month="*",
month="*", day_of_week="*"):
cron_string = ("%s %s %s %s %s" %
(minute or '*',
hour or '*',
day_of_month or '*',
month or '*',
day_of_week or '*'))
iter = croniter(cron_string, timeutils.utcnow())
return iter.get_next(datetime.datetime)
def cron_string_to_next_datetime(minute="*", hour="*", day_of_month="*",
month="*", day_of_week="*", start_time=None):
start_time = start_time or timeutils.utcnow()
cron_string = ("%s %s %s %s %s" %
(_default_if_none(minute, '*'),
_default_if_none(hour, '*'),
_default_if_none(day_of_month, '*'),
_default_if_none(month, '*'),
_default_if_none(day_of_week, '*')))
iter = croniter(cron_string, start_time)
return iter.get_next(datetime.datetime)
def schedule(self, date_from=None):
"""Return a croniter schedule if available."""
if not date_from:
date_from = datetime.now()
try:
# Croniter is an optional import
from croniter.croniter import croniter
except ImportError:
raise ImportError("Croniter not available. Please install croniter"
" python module via pip or your package manager")
return croniter(self.slices.clean_render(), date_from, ret_type=datetime)
def schedule(self, date_from=None):
"""Return a croniter schedule if available."""
if not date_from:
date_from = datetime.now()
try:
# Croniter is an optional import
from croniter.croniter import croniter
except ImportError:
raise ImportError("Croniter not available. Please install croniter"
" python module via pip or your package manager")
return croniter(self.slices.clean_render(), date_from, ret_type=datetime)
def get_next_utc_execution(self):
tz = pytz.timezone(self.timezone)
if not self.next_execution:
base = tz.normalize(datetime.now(tz) - timedelta(minutes=1))
elif self.skip_delayed_jobs_next_time:
base = tz.normalize(datetime.now(tz))
else:
base = tz.normalize(self.next_execution.replace(tzinfo=pytz.utc))
cron = croniter(self.schedule, base)
return cron.get_next(datetime).astimezone(pytz.utc)
def get_next_utc_execution(self):
tz = pytz.timezone(self.timezone)
if not self.next_execution:
base = tz.normalize(datetime.now(tz) - timedelta(minutes=1))
elif self.skip_delayed_jobs_next_time:
base = tz.normalize(datetime.now(tz))
else:
base = tz.normalize(self.next_execution.replace(tzinfo=pytz.utc))
cron = croniter(self.schedule, base)
return cron.get_next(datetime).astimezone(pytz.utc)
def main():
parser = argparse.ArgumentParser()
parser.prog = "python -m aiocron"
parser.add_argument(
"-n",
type=int,
default=1,
help="loop N times. 0 for infinite loop",
)
parser.add_argument("crontab", help='quoted crontab. like "* * * * *"')
parser.add_argument("command", nargs='+', help="shell command to run")
args = parser.parse_args()
cron = args.crontab
try:
croniter(cron)
except ValueError:
parser.error('Invalid cron format')
cmd = args.command
loop = asyncio.get_event_loop()
def calback():
subprocess.call(cmd)
if args.n != 0:
cron.n -= 1
if not cron.n:
loop.stop()
cron = crontab(cron, func=calback)
cron.n = args.n
cron.start()
try:
loop.run_forever()
except:
pass
def cron_string_to_next_datetime(minute="*",
hour="*",
day_of_month="*",
month="*",
day_of_week="*",
start_time=None):
start_time = start_time or timeutils.utcnow()
cron_string = (
"%s %s %s %s %s" %
(_default_if_none(minute, '*'), _default_if_none(hour, '*'),
_default_if_none(day_of_month, '*'), _default_if_none(
month, '*'), _default_if_none(day_of_week, '*')))
iter = croniter(cron_string, start_time)
return iter.get_next(datetime.datetime)
def wrapper(*args, **kwargs):
LOGGER.info('timer started: for %(func)s to run every %(crontab_expression)s', {
'func': func,
'crontab_expression': self.crontab_expression
})
while True:
now = get_current_timestamp()
next = croniter(self.crontab_expression, now).get_next()
delta = next - now
LOGGER.info('timer sleep: wake up after %(delta)s seconds', {
'delta': delta
})
time.sleep(delta)
LOGGER.info('timer woke up')
before = time.time()
try:
func(*args, **kwargs)
finally:
after = time.time()
LOGGER.info('timer work done: in %(elapsed_time)s seconds', {
'elapsed_time': after - before
})
def update_next_trigger_at(self):
base_time = django_timezone.now().replace(tzinfo=pytz.timezone(self.timezone))
self.next_trigger_at = croniter(self.schedule, base_time).get_next(datetime)
def _cron_expr(naive_utc_dt, expr):
aware_utc_dt = convert_naive_datetime_to_aware(naive_utc_dt, tzinfo=pytz.utc)
local_dt = convert_datetime_to_client_timezone(aware_utc_dt)
next_dt = croniter(expr, start_time=local_dt).get_next(ret_type=datetime)
return convert_datetime_to_utc_timezone(next_dt)
def get_next_timestamp(self, now=None):
now = now or get_current_timestamp()
# TODO: remove croniter hack here and in Timer class when croniter is fixed
# return croniter(self.crontab_expression, now).get_next(ret_type=float)
ct = croniter(self.crontab_expression, now + DEFAULT_CLIENT_TIMEZONE.utcoffset(datetime.now()).total_seconds())
return ct.get_next(ret_type=float) - DEFAULT_CLIENT_TIMEZONE.utcoffset(datetime.now()).total_seconds()
def __init__(self, crontab_expression):
croniter(crontab_expression) # validate the expression, throws exception if invalid
self.crontab_expression = crontab_expression
def initialize(self):
"""Initialize croniter and related times"""
if self.croniter is None:
self.time = time.time()
self.loop_time = self.loop.time()
self.croniter = croniter(self.spec, start_time=self.time)
def cron(self): if not self.__cron_iter: self.__cron_iter = croniter(str(self), now(self.timezone)) return self.__cron_iter
def _cron_expr(naive_utc_dt, expr):
aware_utc_dt = convert_naive_datetime_to_aware(naive_utc_dt,
tzinfo=pytz.utc)
local_dt = convert_datetime_to_client_timezone(aware_utc_dt)
next_dt = croniter(expr, start_time=local_dt).get_next(ret_type=datetime)
return convert_datetime_to_utc_timezone(next_dt)
def update_next_trigger_at(self):
tz = pytz.timezone(self.timezone)
dt = tz.normalize(django_timezone.now())
self.next_trigger_at = croniter(self.schedule, dt).get_next(datetime)
def get_next_timestamp(self, now=None):
now = now or get_current_timestamp()
return croniter(self.crontab_expression, now).get_next(ret_type=float)