4.异步邮件发送和定时任务

参考：https://www.cnblogs.com/xiaonq/p/14097376.html

1、创建tasks.py文件进行验证

from celery import Celery
import time

#测试

app = Celery('TASK',
             broker='redis://localhost',        
             backend='redis://localhost')

@app.task
def add(x, y):
   print("running..add.", x, y)
   return x + y

@app.task
def minus(x, y):
   time.sleep(60)
   print("running..minus.", x, y)
   return x - y

1.2启动命令

celery -A tasks worker --loglevel=info            # tasks是tasks.py文件：必须在tasks.py所在目录下执行

2.项目结构如下

 2.1 opwf_project/celery_task文件夹

# -*- coding: utf-8 -*-
# celery.py

from celery import Celery
import os,sys
import django

# 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('proj',
             broker='redis://localhost:6379/14',
             backend='redis://localhost:6379/15',
             include=['celery_task.tasks',

                      ])

# 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': 'celery_task.tasks.test_task_crontab',
        'schedule': 5.0,
        'args': (16, 16)
    },
}

# 6.添加时区配置
app.conf.timezone = 'Asia/Shanghai'
print(dir(app))
if __name__ == '__main__':
   app.start()

from .celery import app
import os,sys
from .celery import CELERY_BASE_DIR


'''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, '../loonflow'))
    from utils.rl_sms import  test_crontab
    res = test_crontab(x,y)
    return x + y




@app.task(bind=True)
def send_sms_code(self, mobile, datas):
    sys.path.insert(0, os.path.join(CELERY_BASE_DIR, '../loonflow'))
    # 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'))

3.1utils.py/rl_sms.py文件夹

from ronglian_sms_sdk import SmsSDK
from user.models import User
accId = '8aaf070875774c6d01758d48effb0a36'
accToken = '10ccc33de038428d864cb5eb122649f6'
appId = '8aaf070875774c6d01758d48f0cd0a3d'


def send_message(mobile, 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, mobile, datas)
    print("##########################################")
    print('执行了这个方法 send_message')
    return resp


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

4.命令

### 1.1 进入执行目录
cd opwf_project

### 1.2 celery管理
celery -A celery_task worker -l INFO               # 单线程
celery multi start w1 w2 -A celery_pro -l info     #一次性启动w1,w2两个worker
celery -A celery_pro status                        #查看当前有哪些worker在运行
celery multi stop w1 w2 -A celery_pro              #停止w1,w2两个worker

# 1.项目中启动celery worker
celery  multi start celery_task -A celery_task -l debug --autoscale=50,10      # celery并发数：最多50个，最少5个
# 2.在项目中关闭celery worker
ps auxww|grep "celery worker"|grep -v grep|awk '{print $2}'|xargs kill -9      # 关闭所有celery进程
```

### 1.3 django_celery_beat管理
# 1.普通测试启动celery beat
celery -A celery_task beat -l info
# 2.在项目中后台启动celery beat
celery -A celery_task beat -l debug >> /aaa/Scheduler.log 2>&1 & 
# 3.停止celery beat
ps -ef | grep -E "celery -A celery_test beat" | grep -v grep| awk '{print $2}' |