celery的快速使用

1.安装celery模块

pip install celery

2.书写demo.py文件

from celery import Celery
import time
broker = 'redis://127.0.0.1:6379/1'
backend = 'redis://127.0.0.1:6379/2'
app = Celery('app', broker=broker, backend=backend)

# 写任务
@app.task
def add(a, b):
    time.sleep(3)  # 模拟任务延迟
    return a + b

3.另写一个文件提交任务

res=add.delay(4,5)
print(res)  # 打印任务id号

4.启动worker

windows系统运行：

首先需要安装eventlet模块

pip3 install eventlet

运行：

celery -A 文件名(demo) worker -l info -P eventlet

非windows系统运行：mac  linux

celery -A 文件名(demo) worker -l info

5.使用代码查询结果

from demo import app
from celery.result import AsyncResult

# 打印的任务id号
id = '17bf03ad-a1e6-49d1-a182-794bd3e96b74'
if __name__ == '__main__':
    a = AsyncResult(id=id, app=app)
    if a.successful():
        result = a.get() # hello world
        print(result)
    elif a.failed():
        print('任务失败')
    elif a.status == 'PENDING':
        print('任务等待中被执行')
    elif a.status == 'RETRY':
        print('任务异常后正在重试')
    elif a.status == 'STARTED':
        print('任务已经开始被执行')

celery使用包结构

######celery.py######

from celery import Celery
#1 实例化得到对象
broker = 'redis://127.0.0.1:6379/1'
backend = 'redis://127.0.0.1:6379/2'

# 任务文件需要注册
app = Celery('app', broker=broker, backend=backend,include=['celery_task.order_task','celery_task.user_task'])
2 写任务 ——以后各种类型任务，需要单独写在py文件中

######order_task.py 和 user_task.py######

order_task.py

import time
from .celery import app
@app.task
def cancel_order(order_id):
    time.sleep(2)
    return '订单：%s取消成功' % order_id

user_task.py

import time
from .celery import app
@app.task
def send_sms(phone, code):
    time.sleep(1)
    return '手机号：%s，发送验证码：%s，成功' % (phone, code)

######提交任务文件######

# 调用发送短信的任务
from celery_task.user_task import send_sms
# 携带手机号和验证码
res=send_sms.delay('15000000000',8888)
# 打印任务id
print(res)

######启动worker文件######

celery -A celery_task worker -l info -P eventlet

######查询结果文件######

# 使用代码，查询结果
from celery_task.celery import app
from celery.result import AsyncResult

# 输入任务id号
id = '46b26c73-62ae-403c-ba62-e469f2f8c69f'
if __name__ == '__main__':
    a = AsyncResult(id=id, app=app)
    if a.successful():
        result = a.get() # hello world
        print(result)
    elif a.failed():
        print('任务失败')
    elif a.status == 'PENDING':
        print('任务等待中被执行')
    elif a.status == 'RETRY':
        print('任务异常后正在重试')
    elif a.status == 'STARTED':
        print('任务已经开始被执行')