celery

1.celery配置与使用

1.1 安装celery

pip install celery @ https://github.com/celery/celery/tarball/master

1.2 新建celery/main.py配置celery

# celery_task/main.py
# -*- coding: utf-8 -*-
from celery import Celery
import os,sys
import django
from datetime import timedelta
# # 1.添加django项目根路径
CELERY_BASE_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.join(CELERY_BASE_DIR, '../opwf'))

# 2.添加django环境
os.environ.setdefault("DJANGO_SETTINGS_MODULE","opwf.settings")
django.setup() # 读取配置


# 3.celery基本配置
app = Celery('mycelery',
             broker='redis://localhost:6379/14',
             backend='redis://localhost:6379/15',
             include=['celery_task.tasks',
                      'celery_task.tasks2',
                      ])

# 4.实例化时可以添加下面这个属性
app.conf.update(
   result_expires=3600,        #执行结果放到redis里，一个小时没人取就丢弃
)

# 5.配置定时任务：每5秒钟执行 调用一次celery_pro下tasks.py文件中的add函数
app.conf.beat_schedule = {
    'add-every-5-seconds': {
        'task': 'tasks.test_task_crontab',
        'schedule': timedelta(seconds=5),
        'args': (16, 16)
    },
}

# 6.添加时区配置
app.conf.timezone = 'UTC'

if __name__ == '__main__':
   app.start()

celery_task/main.py

1.3创建task文件来定义异步任务

# -*- coding:utf8 -*-
from .main import app       #从当前目录导入app
import os,sys
from .main import CELERY_BASE_DIR


# 1.test_task_crontab测试定时任务
@app.task
def test_task_crontab(x,y):
    # 添加django项目路径
    # sys.path.insert(0, os.path.join(CELERY_BASE_DIR, '../opwf'))

    from utils.rl_sms import test_crontab

    res = test_crontab(x, y)

    print(x+y)
    return x + y


# 2.测试异步发送邮件
@app.task(bind=True)
def send_sms_code(self, mobile, datas):
    sys.path.insert(0, os.path.join(CELERY_BASE_DIR, '../opwf'))
    # 在方法中导包
    from utils.rl_sms import send_message
    # time.sleep(5)
    try:
        # 用 res 接收发送结果, 成功是:０，　失败是：－１
        res = send_message(mobile, datas)
    except Exception as e:
        res = '-1'

    if res == '-1':
        # 如果发送结果是 -1  就重试.
        self.retry(countdown=5, max_retries=3, exc=Exception('短信发送失败'))

celery_task/tasks.py

1.4封装一个公用的方法

# -*- coding: utf-8 -*-
# utils/rl_sms.py
from ronglian_sms_sdk import SmsSDK
from user.models import User


accId = '8a216da8747ac98201749c0de38723b7'
accToken = '86072b540b4648229b27400414150ef2'
appId = '8a216da8747ac98201749c0de45123be'


def send_message(phone, datas):
    user = User.objects.all()[0]
    print(user.username, '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%')
    sdk = SmsSDK(accId, accToken, appId)
    tid = '1'  # 测试模板id为: 1. 内容为: 【云通讯】您的验证码是{1}，请于{2}分钟内正确输入。
    # mobile = '13303479527'
    # datas = ('666777', '5')  # 模板中的参数按照位置传递
    # resp = sdk.sendMessage(tid, phone, datas)
    print("##########################################")
    print('执行了这个方法 send_message')
    return ''

from workorder.models import SubOrder



def test_crontab(x,y):
    # need_approve = SubOrder.objects.filter(suborder_status='1')

    print('############### 执行test_crontab测试任务 #############')
    print(x+y)
    print('############### 邮件审批超时提醒 #############')

opwf/utils/rl_sms.py

1.5在views.py里使用异步任务来处理函数

import sys,os
from opwf.settings import BASE_DIR
from django.http.response import JsonResponse
# Create your views here.


def test(request):
    print(BASE_DIR)
    #添加总文件opwf_project文件夹为新的导包路径，将celery_task中的文件导入
    sys.path.insert(0, os.path.join(BASE_DIR, '../../opwf_project'))
    print(sys.path)
    
    #导入celery_task文件中的异步任务
    from celery_task.tasks import test_task_crontab

    #异步任务的调用
    test_task_crontab.delay(10,20)
    
    return JsonResponse({"code":200})

views.py

2.测试celery

2.1 启动celery

'''1.启动celery'''
#1.1 单进程启动celery
celery -A main worker -l INFO
#1.2 celery管理
celery  multi start celery_test -A celery_test -l debug --autoscale=50,5        # celery并发数：最多50个，最少5个
ps auxww|grep "celery worker"|grep -v grep|awk '{print $2}'|xargs kill -9       # 关闭所有celery进程