Skip to content
This repository has been archived by the owner. It is now read-only.
master
Go to file
Code

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
Oct 30, 2014
Oct 4, 2014
Dec 26, 2016
Sep 29, 2012

README.rst

Celery integration with Tornado

tornado-celery is a non-blocking Celery client for Tornado web framework

Usage

Calling Celery tasks from Tornado RequestHandler:

from tornado import gen, web
import tcelery, tasks

tcelery.setup_nonblocking_producer()

class AsyncHandler(web.RequestHandler):
    @asynchronous
    def get(self):
        tasks.echo.apply_async(args=['Hello world!'], callback=self.on_result)

    def on_result(self, response):
        self.write(str(response.result))
        self.finish()

Calling tasks with generator-based interface:

class GenAsyncHandler(web.RequestHandler):
    @asynchronous
    @gen.coroutine
    def get(self):
        response = yield gen.Task(tasks.sleep.apply_async, args=[3])
        self.write(str(response.result))
        self.finish()

NOTE: Currently callbacks only work with AMQP and Redis backends. To use the Redis backend, you must install tornado-redis.

tornado-celery can be launched as a web server:

$ cd tornado-celery
$ python -m tcelery --port=8888 --app=examples.tasks --address=0.0.0.0

Execute a task asynchronously:

$ curl -X POST -d '{"args":["hello"]}' http://localhost:8888/apply-async/examples.tasks.echo/
{"task-id": "a24c9e38-4976-426a-83d6-6b10b4de7ab1", "state": "PENDING"}

Get the result:

$ curl http://localhost:8888/tasks/result/a24c9e38-4976-426a-83d6-6b10b4de7ab1/
{"task-id": "a24c9e38-4976-426a-83d6-6b10b4de7ab1", "state": "SUCCESS", "result": "hello"}

Execute a task and get the result:

$ curl -X POST -d '{"args":[1,2]}' http://localhost:8888/apply/examples.tasks.add/
{"task-id": "fe3cc5a5-d11b-4b17-a6e2-e7fd2fba7ec6", "state": "SUCCESS", "result": 3}

Execute a task with timeout:

$ curl -X POST -d '{"args":[5],"timeout":1}' http://localhost:8888/apply/examples.tasks.sleep/
{"task-id": "9ca78e26-bbb2-404c-b3bb-bc1c63cbdf41", "state": "REVOKED"}

Installation

To install, simply:

$ pip install tornado-celery

Documentation

Documentation is available at Read the Docs

Running the Tests

To run the tests for the AMQP backend:

$ python examples/tasks.py worker
$ cd examples && python -m tcelery -A tasks
$ python tests/functests.py

To run the tests for the Redis backend, first make sure redis is running, then:

$ CELERY_RESULT_BACKEND=redis:// python examples/tasks.py worker
$ cd examples && CELERY_RESULT_BACKEND=redis:// python -m tcelery -A tasks
$ python tests/functests.py
You can’t perform that action at this time.