我正在尝试连接到这里描述的芹菜信号：
http://docs.celeryproject.org/en/latest/userguide/signals.html
我可以连接到task_sent信号没问题 .
但是当我尝试连接到task_success或task_postrun时，没有任何反应 . 对于我的经纪人和我的后端我正在使用postgres sql .
I'm trying to understand why it is not working
我从这里的文档中想到了一件事：
http://docs.celeryproject.org/en/latest/getting-started/brokers/sqlalchemy.html#broker-sqlalchemy
它说 ：
限制：事件，包括Django Admin监视器 .
目前尚不清楚他们何时说出事件，他们的意思是信号 .
请帮忙 .
tasks.py
from celery import Celery
from celery.signals import task_sent, task_success, task_postrun
import celeryconfig
celery_config_dict = {** stuff **}
celery = Celery('tasks',)
celery.add_defaults(celery_config_dict)
@celery.task
def add(x, y):
return x + y
@task_sent.connect
def task_sent_handler(sender=None, task_id=None, task=None, args=None, kwargs=None, **kwds):
print(''' Task Sent!
sender: %s
task_id: %s
task: %s
args: %s
kargs: %s
kwds: %s''' % ( sender,
task_id,
task,
args,
kwargs,
kwds))
@task_success.connect
def task_success_handler(sender=None, result=None, args=None, kwargs=None, **kwds):
print(''' Success!
sender:%s
result:%s
args:%s
kwargs:%s
kwds:%s''' % (sender, result, args, kwargs, kwds))
@task_postrun.connect
def task_postrun_handler(sender=None, task_id=None, task=None, args=None, kwargs=None, retval=None, state=None, **kwds):
print(''' Done!
sender: %s
task_id: %s
task: %s
retval: %s
state: %s
args:%s
kwargs:%s
kwds:%s''' % (sender, task_id, task, retval, state, args, kwargs, kwds,))
在python解释器中
>>> import tasks
>>> r = tasks.add.apply_async((3,8), countdown=10)
Task Sent!
sender: tasks.add
task_id: None
task: tasks.add
args: (3, 8)
kargs: {}
kwds: {'utc': True, 'chord': None, 'retries': 0, 'signal': <Signal: Signal>, 'expires': None, 'callbacks': None, 'errbacks': None, 'taskset': None, 'eta': '2013-02-01T01:43:35.978889', 'id': '87c8d0f4-ae67-4c3d-9e94-45e99cf6304a'}
>>>
1 回答
不，事件和信号不一样 . 见http://docs.celeryproject.org/en/latest/userguide/monitoring.html#events
您不希望在该解释器中打印任何内容，因为信号是当前进程的本地信号，因此预执行/后发信号将在执行任务的过程中触发 .