模块：
Python 3.6.6
PyMySQL==0.8.1
Django==2.1.3
redis==3.0.1
celery==4.1.1
django-celery-beat ==1.1.1
django-celery-results==1.0.1
目录结构
emgc
├── front
│ ├── __init__.py
│ ├── apps.py
│ ├── migrations
│ │ └── __init__.py
│ ├── models.py
│ ├── tasks.py
│ └── views.py
├── manage.py
├── emgc
│ ├── __init__.py
│ ├── celery.py
│ ├── settings.py
│ ├── urls.py
│ └── wsgi.py
└── templates
配置使用
emgc/emgc/celery.py:
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from emgc import settings
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'emgc.settings')
app = Celery('emgc')
# Using a string here means the worker don't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
# should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')
# Load task modules from all registered Django app configs.
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
emgc/emgc/__init__.py：
from __future__ import absolute_import, unicode_literals
# This will make sure the app is always imported when
# Django starts so that shared_task will use this app.
from .celery import app as celery_app
__all__ = ['celery_app']
emgc/emgc/settings.py
import pymysql
pymysql.install_as_MySQLdb()
INSTALLED_APPS = [
...
'django_celery_results',
'django_celery_beat',
'front',
]
LANGUAGE_CODE = 'zh-Hans'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_L10N = True
USE_TZ = True #如果USE_TZ设置为True时，Django会使用系统默认设置的时区，即America/Chicago，此时的TIME_ZONE不管有没有设置都不起作用。
# celery for redis
# 由于celery-4.1.0存在时区bug，必须使用UTC时区
CELERY_RESULT_BACKEND = 'redis://localhost:6379' # BACKEND配置，这里使用redis
# CELERY_RESULT_BACKEND = 'django-db' #使用django orm 作为结果存储
CELERY_BROKER_URL = 'redis://localhost:6379'
CELERY_TIMEZONE = 'UTC'
CELERY_ENABLE_UTC = True
CELERY_BEAT_SCHEDULER = 'django_celery_beat.schedulers:DatabaseScheduler'
# 使用数据库来存放定时任务记录
CELERYBEAT_SCHEDULER = 'djcelery.schedulers.DatabaseScheduler'
进入项目的taskproj目录启动worker：
celery -A tasks worker --pool=solo -l info （在windows下 不加--pool=solo 出现报错ValueError: not enough values to unpack (expected 3, got 0)）
定义任务
emgc/front/tasks.py：
from __future__ import absolute_import, unicode_literals
from celery import shared_task
@shared_task
def add(x, y):
return x + y
@shared_task
def mul(x, y):
return x * y
触发任务
emgc/front/views.py：
from django.http import JsonResponse
from app01 import tasks
# Create your views here.
def index(request):
x = int(request.GET.get("x"))
y = int(request.GET.get("y"))
res1=tasks.add.delay(x,y)
res2=tasks.mul.delay(x,y)
print("add:", x, y, res1.task_id)
print("mul:", x, y, res2.task_id)
return JsonResponse("success", safe=False)
从redis中获取结果：
127.0.0.1:6379> get celery-task-meta-517829d8-ebe5-4be2-95d9-d750df717cc0 （517829d8-ebe5-4be2-95d9-d750df717cc0 为task_id）
使用django orm 作为结果存储：
CELERY_RESULT_BACKEND = 'django-db' emgc/emgc/settings.py中配置
python3 manage.py migrate django_celery_results 生成表
（django_celery_results_taskresult）
model :
class TaskResult(models.Model):
"""Task result/status."""
task_id = models.CharField(_('task id'), max_length=255, unique=True)
task_name = models.CharField(_('task name'), null=True, max_length=255)
task_args = models.TextField(_('task arguments'), null=True)
task_kwargs = models.TextField(_('task kwargs'), null=True)
status = models.CharField(_('state'), max_length=50,
default=states.PENDING,
choices=TASK_STATE_CHOICES
)
content_type = models.CharField(_('content type'), max_length=128)
content_encoding = models.CharField(_('content encoding'), max_length=64)
result = models.TextField(null=True, default=None, editable=False)
date_done = models.DateTimeField(_('done at'), auto_now=True)
traceback = models.TextField(_('traceback'), blank=True, null=True)
hidden = models.BooleanField(editable=False, default=False, db_index=True)
meta = models.TextField(null=True, default=None, editable=False)
objects = managers.TaskResultManager()
class Meta:
"""Table information."""
ordering = ['-date_done']
verbose_name = _('task result')
verbose_name_plural = _('task results')
def as_dict(self):
return {
'task_id': self.task_id,
'task_name': self.task_name,
'task_args': self.task_args,
'task_kwargs': self.task_kwargs,
'status': self.status,
'result': self.result,
'date_done': self.date_done,
'traceback': self.traceback,
'meta': self.meta,
}
def __str__(self):
return '<Task: {0.task_id} ({0.status})>'.format(self)