Question

我正在构建一个Tornado Web服务器，该服务器需要执行一些阻塞任务，例如压缩视频文件等，这些都非常耗时。理想情况下，我想交出这些任务到Celery这样的子流程实用程序并相应地通知客户端。所以，我从GitHub＆amp; amp;中获取了this代码。修改它以获得更好的理解。我正在使用Ubuntu 12.04 LTS，这是我到目前为止所做的：

安装了龙卷风并且独立工作。
已安装RabbitMQ（apt-get install rabbitmq-server）。
已安装的Tornado Celery（已下载并解压缩tar文件）。
已执行python -m pip install tornado-celery
从Github Repo上面借了2个示例python文件并对其进行了修改。

我的任务代码段代码（myTornadoTasks.py）是：

import os
import time
from datetime import datetime

from celery import Celery
from celery import task

celery = Celery("myTornadoTasks", broker="amqp://")
celery.conf.CELERY_RESULT_BACKEND = os.environ.get('CELERY_RESULT_BACKEND', 'amqp')

@celery.task
def add(x, y):
    return int(x) + int(y)

    ..... some more code 

@celery.task
def error(msg):
    raise Exception(msg)


if __name__ == "__main__":
   celery.start()

我使用celery worker -A myTornadoTasks &启动任务。在这里一切正常，我看到24个线程正在运行。

我的Tornado Celery代码段（myTornadoCelery.py）是：

from tornado import gen 
from tornado import ioloop 
from tornado.web import asynchronous, RequestHandler, Application

import myTornadoTasks

import tcelery tcelery.setup_nonblocking_producer()

class AsyncHandler(RequestHandler):
    @asynchronous
    def get(self):
        myTornadoTasks.sleep.apply_async(args=[3], callback=self.on_result)

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

... some more code

application = Application([
    (r"/async-sleep", AsyncHandler),
    (r"/gen-async-sleep", GenAsyncHandler),
    (r"/gen-async-sleep-add", GenMultipleAsyncHandler),
])


if __name__ == "__main__":
    application.listen(8887)
    ioloop.IOLoop.instance().start()

我使用python -m tcelery --app=myTornadoCelery --address=0.0.0.0

启动Tornado

我收到错误AttributeError: 'module' object has no attribute 'celery'

问题：

上述错误是什么意思？我错过了什么？
我在这里错过了什么步骤吗？ RabbitMQ在哪里被调用？
如何从24开始增加/减少芹菜工人数量？

感谢。

更新了错误：

Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/local/lib/python2.7/dist-packages/tcelery/__main__.py", line 62, in <module>
    main()
  File "/usr/local/lib/python2.7/dist-packages/tcelery/__main__.py", line 56, in main
    cmd.execute_from_commandline()
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 309, in execute_from_commandline
    argv = self.setup_app_from_commandline(argv)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 469, in setup_app_from_commandline
    self.app = self.find_app(app)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 489, in find_app
    return find_app(app, symbol_by_name=self.symbol_by_name)
  File "/usr/local/lib/python2.7/dist-packages/celery/app/utils.py", line 240, in find_app
    found = sym.celery
AttributeError: 'module' object has no attribute 'celery'

挣扎着龙卷风 - 芹菜整合

0 个答案: