/usr/share/pyshared/djcelery/models.py is in python-django-celery 2.5.5-2.
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from datetime import timedelta
from time import time, mktime
import django
from django.conf import settings
from django.core.exceptions import MultipleObjectsReturned, ValidationError
from django.db import models
from django.db.models import signals
from django.utils.translation import ugettext_lazy as _
from picklefield.fields import PickledObjectField
from celery import schedules
from celery import states
from celery.utils.timeutils import timedelta_seconds
from . import managers
from .utils import now
HEARTBEAT_EXPIRE = 150 # 2 minutes, 30 seconds
TASK_STATE_CHOICES = zip(states.ALL_STATES, states.ALL_STATES)
class TaskMeta(models.Model):
"""Task result/status."""
task_id = models.CharField(_(u"task id"), max_length=255, unique=True)
status = models.CharField(_(u"task status"), max_length=50,
default=states.PENDING, choices=TASK_STATE_CHOICES)
result = PickledObjectField(null=True, default=None)
date_done = models.DateTimeField(_(u"done at"), auto_now=True)
traceback = models.TextField(_(u"traceback"), blank=True, null=True)
hidden = models.BooleanField(editable=False, default=False, db_index=True)
objects = managers.TaskManager()
class Meta:
"""Model meta-data."""
verbose_name = _(u"task meta")
verbose_name_plural = _(u"task meta")
db_table = "celery_taskmeta"
def to_dict(self):
return {"task_id": self.task_id,
"status": self.status,
"result": self.result,
"date_done": self.date_done,
"traceback": self.traceback}
def __unicode__(self):
return u"<Task: %s state->%s>" % (self.task_id, self.status)
class TaskSetMeta(models.Model):
"""TaskSet result"""
taskset_id = models.CharField(_(u"task id"), max_length=255, unique=True)
result = PickledObjectField()
date_done = models.DateTimeField(_(u"done at"), auto_now=True)
hidden = models.BooleanField(editable=False, default=False, db_index=True)
objects = managers.TaskSetManager()
class Meta:
"""Model meta-data."""
verbose_name = _(u"taskset meta")
verbose_name_plural = _(u"taskset meta")
db_table = "celery_tasksetmeta"
def to_dict(self):
return {"taskset_id": self.taskset_id,
"result": self.result,
"date_done": self.date_done}
def __unicode__(self):
return u"<TaskSet: %s>" % (self.taskset_id)
PERIOD_CHOICES = (("days", _(u"Days")),
("hours", _(u"Hours")),
("minutes", _(u"Minutes")),
("seconds", _(u"Seconds")),
("microseconds", _(u"Microseconds")))
class IntervalSchedule(models.Model):
every = models.IntegerField(_(u"every"), null=False)
period = models.CharField(_(u"period"), max_length=24,
choices=PERIOD_CHOICES)
class Meta:
verbose_name = _(u"interval")
verbose_name_plural = _(u"intervals")
@property
def schedule(self):
return schedules.schedule(timedelta(**{self.period: self.every}))
@classmethod
def from_schedule(cls, schedule, period="seconds"):
every = timedelta_seconds(schedule.run_every)
try:
return cls.objects.get(every=every, period=period)
except cls.DoesNotExist:
return cls(every=every, period=period)
except MultipleObjectsReturned:
cls.objects.filter(every=every, period=period).delete()
return cls(every=every, period=period)
def __unicode__(self):
if self.every == 1:
return _(u"every %(period)s") % {"period": self.period[:-1]}
return _(u"every %(every)s %(period)s") % {"every": self.every,
"period": self.period}
class CrontabSchedule(models.Model):
minute = models.CharField(_(u"minute"),
max_length=64,
default="*")
hour = models.CharField(_(u"hour"),
max_length=64,
default="*")
day_of_week = models.CharField(_(u"day of week"),
max_length=64,
default="*")
class Meta:
verbose_name = _(u"crontab")
verbose_name_plural = _(u"crontabs")
def __unicode__(self):
rfield = lambda f: f and str(f).replace(" ", "") or "*"
return u"%s %s %s (m/h/d)" % (rfield(self.minute),
rfield(self.hour),
rfield(self.day_of_week))
@property
def schedule(self):
return schedules.crontab(minute=self.minute,
hour=self.hour,
day_of_week=self.day_of_week,
nowfun=now)
@classmethod
def from_schedule(cls, schedule):
return cls(minute=schedule._orig_minute,
hour=schedule._orig_hour,
day_of_week=schedule._orig_day_of_week)
class PeriodicTasks(models.Model):
ident = models.SmallIntegerField(default=1, primary_key=True, unique=True)
last_update = models.DateTimeField(null=False)
objects = managers.ExtendedManager()
@classmethod
def changed(cls, instance, **kwargs):
if not instance.no_changes:
cls.objects.update_or_create(ident=1,
defaults={"last_update": now()})
@classmethod
def last_change(cls):
try:
return cls.objects.get(ident=1).last_update
except cls.DoesNotExist:
pass
class PeriodicTask(models.Model):
name = models.CharField(_(u"name"), max_length=200, unique=True,
help_text=_(u"Useful description"))
task = models.CharField(_(u"task name"), max_length=200)
interval = models.ForeignKey(IntervalSchedule, null=True, blank=True,
verbose_name=_(u"interval"))
crontab = models.ForeignKey(CrontabSchedule, null=True, blank=True,
verbose_name=_(u"crontab"),
help_text=_(u"Use one of interval/crontab"))
args = models.TextField(_(u"Arguments"),
blank=True, default="[]",
help_text=_(u"JSON encoded positional arguments"))
kwargs = models.TextField(_(u"Keyword arguments"),
blank=True, default="{}",
help_text=_("JSON encoded keyword arguments"))
queue = models.CharField(_("queue"),
max_length=200, blank=True,
null=True, default=None,
help_text=_(u"Queue defined in CELERY_QUEUES"))
exchange = models.CharField(_(u"exchange"),
max_length=200, blank=True,
null=True, default=None)
routing_key = models.CharField(_(u"routing key"),
max_length=200, blank=True,
null=True, default=None)
expires = models.DateTimeField(_(u"expires"),
blank=True, null=True)
enabled = models.BooleanField(_(u"enabled"), default=True)
last_run_at = models.DateTimeField(
auto_now=False, auto_now_add=False,
editable=False, blank=True, null=True)
total_run_count = models.PositiveIntegerField(default=0, editable=False)
date_changed = models.DateTimeField(auto_now=True)
description = models.TextField(_("description"), blank=True)
objects = managers.PeriodicTaskManager()
no_changes = False
class Meta:
verbose_name = _(u"periodic task")
verbose_name_plural = _(u"periodic tasks")
def validate_unique(self, *args, **kwargs):
super(PeriodicTask, self).validate_unique(*args, **kwargs)
if not self.interval and not self.crontab:
raise ValidationError(
{"interval": ["One of interval or crontab must be set."]})
if self.interval and self.crontab:
raise ValidationError(
{"crontab": ["Only one of interval or crontab must be set"]})
def save(self, *args, **kwargs):
self.exchange = self.exchange or None
self.routing_key = self.routing_key or None
self.queue = self.queue or None
super(PeriodicTask, self).save(*args, **kwargs)
def __unicode__(self):
if self.interval:
return u"%s: %s" % (self.name, unicode(self.interval))
if self.crontab:
return u"%s: %s" % (self.name, unicode(self.crontab))
return u"%s: {no schedule}" % (self.name, )
@property
def schedule(self):
if self.interval:
return self.interval.schedule
if self.crontab:
return self.crontab.schedule
signals.pre_delete.connect(PeriodicTasks.changed, sender=PeriodicTask)
signals.pre_save.connect(PeriodicTasks.changed, sender=PeriodicTask)
class WorkerState(models.Model):
hostname = models.CharField(_(u"hostname"), max_length=255, unique=True)
last_heartbeat = models.DateTimeField(_(u"last heartbeat"), null=True,
db_index=True)
objects = managers.ExtendedManager()
class Meta:
"""Model meta-data."""
verbose_name = _(u"worker")
verbose_name_plural = _(u"workers")
get_latest_by = "last_heartbeat"
ordering = ["-last_heartbeat"]
def __unicode__(self):
return self.hostname
def __repr__(self):
return "<WorkerState: %s>" % (self.hostname, )
def is_alive(self):
if self.last_heartbeat:
return time() < self.heartbeat_timestamp + HEARTBEAT_EXPIRE
return False
@property
def heartbeat_timestamp(self):
return mktime(self.last_heartbeat.timetuple())
class TaskState(models.Model):
state = models.CharField(_(u"state"),
max_length=64,
choices=TASK_STATE_CHOICES, db_index=True)
task_id = models.CharField(_(u"UUID"),
max_length=36, unique=True)
name = models.CharField(_(u"name"),
max_length=200, null=True, db_index=True)
tstamp = models.DateTimeField(_(u"event received at"), db_index=True)
args = models.TextField(_(u"Arguments"), null=True)
kwargs = models.TextField(_(u"Keyword arguments"), null=True)
eta = models.DateTimeField(_(u"ETA"), null=True,
help_text=u"date to execute")
expires = models.DateTimeField(_(u"expires"), null=True)
result = models.TextField(_(u"result"), null=True)
traceback = models.TextField(_(u"traceback"), null=True)
runtime = models.FloatField(_(u"execution time"), null=True,
help_text=_(u"in seconds if task successful"))
retries = models.IntegerField(_(u"number of retries"), default=0)
worker = models.ForeignKey(WorkerState, null=True,
verbose_name=_("worker"))
hidden = models.BooleanField(editable=False, default=False, db_index=True)
objects = managers.TaskStateManager()
class Meta:
"""Model meta-data."""
verbose_name = _(u"task")
verbose_name_plural = _(u"tasks")
get_latest_by = "tstamp"
ordering = ["-tstamp"]
def __unicode__(self):
name = self.name or "UNKNOWN"
s = u"%s %s %s" % (self.state.ljust(10),
self.task_id.ljust(36),
name)
if self.eta:
s += u" eta:%s" % (self.eta, )
return s
def __repr__(self):
return "<TaskState: %s %s(%s) ts:%s>" % (self.state,
self.name or "UNKNOWN",
self.task_id,
self.tstamp)
if (django.VERSION[0], django.VERSION[1]) >= (1, 1):
# Keep models away from syncdb/reset if Django database
# backend is not being used.
if "database" not in (getattr(settings,
"CELERY_RESULT_BACKEND", None) or "database"):
for result_model in (TaskMeta, TaskSetMeta):
result_model._meta.managed = False
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