python - How to use Celery in Tornado with redis as broker and backend? -


it raises exception when try use celery3.1.11, tornado-celery0.3.5 in tornado4.2 yield. works without yield, cannot result asynchronous...i find works when use rabbitmq broker, while redis raise below error...

here code.

from mycelery import celery_task import tcelery tcelery.setup_nonblocking_producer()  token = yield tornado.gen.task(celery_task.get_rongcloud_token.apply_async,args=[3]) print token

my celery task:

from celery import celery, platforms celery.schedules import crontab celery.utils.log import get_task_logger celery.exceptions import softtimelimitexceeded  platforms.c_force_root = true  # linux 下要root用户才不报错 broker = 'redis://:'+settings.redis_pass+'@127.0.0.1:6379/5' backend = 'redis://:'+settings.redis_pass+'@127.0.0.1:6379/6' app = celery('tasks', broker=broker, backend=backend)  @app.task(name='mycelery.celery_task.get_rongcloud_token') def get_rongcloud_token(user_id):     print 'xxxxx'     = 'xxx'     return

here error:

 typeerror: <function wrapper @ 0x5bd2c80> not json serializable

hha，find same question: tornado celery can't use gen.task or callback

the limited docs tcelery doesn't explain , example doesn't show either. limited docs, seem you're using intended (unless i'm missing something) i'm not sure why code not working. i've been successful following method:

class celerytasks(web.requesthandler):      @gen.coroutine     def get(self):         future = concurrent.future()         celery_task = tasks.get_rongcloud_token.delay(3)         check_status(celery_task, future)         yield future         self.write(future.result())         #self.write(celery_task.result)   def check_status(celery_task, future):     """     check status of celery task , set result in future     """     if not celery_task.ready():         ioloop.ioloop.current().call_later(             1,             check_status,             celery_task,             future)     else:         future.set_result(celery_task.result)

first bare future created, yielded until results celery task available. next execute celery task async execution (eg. task_fn.delay(*args) or task_fn.apply_async(*args)). pass celery_task , future function (check_status) check if task "ready", if not, recursively call @ later time , check again. yield future until result set. once task has completed , result available, set future result , whatever need result.


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