celery 组件在django环境应用

第一步安装

pip install celery==4.4

第二步 配置环境

# ############################# celery 配置连接redis #############################
#添加密码的
CELERY_BROKER_URL = 'redis://:foobared@127.0.0.1:6379/0'
CELERY_ACCEPT_CONTENT = ['json']
CELERY_RESULT_BACKEND = 'redis://:foobared@127.0.0.1:6379/0'
CELERY_TASK_SERIALIZER = 'json'

第三步 　　【项目/项目/celery.py】在项目同名目录创建 celery.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 拒绝隐式引入，因为celery.py的名字和celery的包名冲突，需要使用这条语句让程序正确运行
from __future__ import absolute_import
import os
from celery import Celery

# set the default Django settings module for the 'celery' program.

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'auction.settings')

app =Celery('auction')

# Using a string here means the worker doesn'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.
# 去每个已注册app中读取 tasks.py 文件
app.autodiscover_tasks()

　第四步【项目/app名称/tasks.py】　

from celery import shared_task

@shared_task
def add(x, y):
    return x + y

@shared_task
def mul(x, y):
    return x * y

第五步 【项目/项目/__init__.py】　

from .celery import app as celery_app

__all__ = ('celery_app',)

第六步 启动worker

进入项目目录

celery worker -A s -l info -P eventle

　第七步 编写视图函数，调用celery去创建任务

from django.shortcuts import HttpResponse
from api.tasks import x1

def create_task(request):
    print('请求来了')
    result = x1.delay(2,2)
    print('执行完毕')
    return HttpResponse(result.id)

def get_result(request):
    nid = request.GET.get('nid')
    from celery.result import AsyncResult
    # from demos.celery import app
    from demos import celery_app
    result_object = AsyncResult(id=nid, app=celery_app)
    # print(result_object.status)
    data = result_object.get()
    return HttpResponse(data)

　　第八步 启动django程序

http://127.0.0.1:8000/api/get/task/?nid=68d4c97e-92e5-42e4-a04d-c1a8f35fb4a
http://127.0.0.1:8000/api/create/task/

　　注意事项：

本地时间和URF实际转换：

Python3 :
    # 本地时间转换成utc时间
    utc_ctime = datetime.datetime.utcfromtimestamp(ctime.timestamp())
    target_time = utc_ctime + datetime.timedelta(seconds=10)
    result = x1.apply_async(args=[11, 3], eta=target_time)

python2 :

    # “”“本地时间转UTC时间（-8:00）”“”
     time_struct = time.mktime(ctime.timetuple())
     utc_st = datetime.datetime.utcfromtimestamp(time_struct)

     # utc_ctime = datetime.datetime.utcfromtimestamp(ctime.timestamp())
     target_time = utc_st + datetime.timedelta(seconds=30)