celery + rabbitmq? Basic Use

version:

　　(celery==4.3，rabbitmq==3.7)

A. Use rabbitmq

# Mounting RabbitMQ (MAC) 
BREW the install RabbitMQ
 # configure the environment variables (.bash_profile or .profile, note the path) 
Export RABBIT_HOME = / usr / local / Cellar / RabbitMQ / 3.7.15 
Export the PATH = the PATH $: $ RABBIT_HOME / sbin 

# Set RabbitMQ: create a user, a web hosting and set permissions (need to start the service) 
sudo rabbitmqctl add_user myuser mypassword 
sudo rabbitmqctl add_vhost myvhost   # virtual host 
sudo rabbitmqctl set_user_tags myuser MyTag by a value   # Administrator 
sudo rabbitmqctl set_permissions -p myvhost myuser " *. "  " * "  " * " 

# start? service 
sudo rabbitmq-Server
 # running in the background 
sudo RabbitMQ-Server - detached
 # Do not kill (1) to stop the server 
sudo rabbitmqctl stop

Use two .celery

# Install
 pip install celery

　　application

# Tasks.py 
from Celery Import Celery 

App = Celery (
     ' Tasks ' ,   # current module name 
    Broker = ' AMQP: Guest @ // localhost: // Port '   # message queue url 
) 

@ app.task 
DEF the Add (X , Y):
     return X + Y

　　Run worker

celery -A tasks worker --loglevel=info

　　Calling task

# delay
from tasks import add
add.delay(arg1,arg2,kwarg1='x',kwarg2='y')
add.delay(*args, **kwargs).apply_async(args, kwargs)

# apply_async
task.apply_async(args=[arg1,arg2], kwargs={'kwargs':'x','kwargs':'y'})
tasks.apply_async((arg,), {'kwarg': value})
# 从现在起10秒内执行
tasks.apply_async (COUNTDOWN = 10 ) 
 # performed within 10 seconds from now, the specified ETA 
tasks.apply_async (ETA = now + timedelta (= 10 seconds The ))
 # performed after one minute from now, but expires after 2 minutes 
tasks.apply_async (COUNTDOWN = 60, expires = 120 )
 # expiration 2 days provided the use datetime objects 
T.apply_async (expires = now + timedelta (days = 2 )) 

# send_task: task is not registered in the current process 
app. send_task ( ' task ' , args = [Arg,], = Queue ' default ' ) 

# signature to a subject (e.g., transmission via Internet) calls the signature transfer tasks, and they also support API calling 
task.s (arg1, arg2, = kwarg1 ' X ' , kwargs2 = ' Y').apply_async()