(九)9-3celery多实例

Celery模块调用
celery可以支持多台不同的计算机执行不同的任务或者相同的任务。
celery分布式应用：多个消息队列(Message Queue),不同的消息可以指定发给不同的MessageQueue，这是通过Exchange实现的。发送消息到 MessageQueue中时，可以指定routing——key，Exchange通过routing_key把消息路由(routes)到不同的MessageQueue中

例子：

Celeryconfing.py

from kombu import Exchange,Queue
BROKER_URL = "redis://172.16.61.158:6379/1"
CELERY_RESULT_BACKEND = "redis://172.16.61.158:6379/2"

CELERY_QUEUES = {
    Queue("default",Exchange("default"),routing_key = "default"),
    Queue("for_task_A",Exchange("for_task_A"),routing_key = "for_task_A"),
    Queue("for_task_B",Exchange("for_task_B"),routing_key = "for_task_B"),
}

celery_ex1.py

from  celery import  Celery
app = Celery()
app.config_from_object("celeryconfig")
@app.task
def taskA(x,y):
    return  x*y
@app.task
def taskB(x,y,z):
    return  x+y+z
@app.task
def add(x,y):
    return x + y

r1 = taskA.delay(10,20)
print r1.result

r2 = taskB.delay(10,20,30)
print r2.result
print r2.status

r3 = add.delay(100,200)
print r3.result
print r3.status

启动一个worker指定task

celery -A celery_ex1 worker -l info -Q for_task_A
celery -A celery_ex1 worker -l info -Q for_task_A