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Flask-Melodramatiq-1.0
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مشاهده بیشترتوضیحات
A Flask extension that adds support for the "dramatiq" task processing library
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | Flask-Melodramatiq-1.0 |
| نام | Flask-Melodramatiq |
| نسخه کتابخانه | 1.0 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Evgeni Pandurski |
| ایمیل نویسنده | epandurski@gmail.com |
| آدرس صفحه اصلی | https://github.com/epandurski/flask_melodramatiq |
| آدرس اینترنتی | https://pypi.org/project/Flask-Melodramatiq/ |
| مجوز | MIT |
Flask-Melodramatiq
==================
**Flask-Melodramatiq** is a `Flask`_ extension that adds support for
the `Dramatiq`_ task processing library.
`Dramatiq`_ is a great library, and Flask-Melodramatiq tries hard not
to force you to change the way you interact with
it. Flask-Melodramatiq defines thin wrappers around the broker types
available in Dramatiq, so that all the power of Dramatiq's API remains
available to you.
For example::
import dramatiq
from flask import Flask
from flask_melodramatiq import RabbitmqBroker
app = Flask(__name__)
broker = RabbitmqBroker(app)
dramatiq.set_broker(broker)
@dramatiq.actor
def task():
print('Snakes appreciate good theatrical preformace.')
or, if you prefer the Flask application factory pattern::
import dramatiq
from flask import Flask
from flask_melodramatiq import RabbitmqBroker
broker = RabbitmqBroker()
dramatiq.set_broker(broker)
@dramatiq.actor
def task():
print('Snakes appreciate good theatrical preformace.')
def create_app():
app = Flask(__name__)
broker.init_app(app)
return app
In those examples, the ``broker`` instance that we created (we call it
a "lazy broker") is a genuine `Dramatiq`_ broker, and can be used
anywhere where a "native" broker can be used. (It has
``dramatiq.brokers.rabbitmq.RabbitmqBroker`` as a superclass!) Lazy
brokers are thin wrappers which add several important features:
1. They honor the settings in the Flask application configuration.
2. ``init_app`` can be called on them *before or after* the
actors have been defined.
3. The Flask application context is correctly set during the execution
of the tasks.
4. They add few convenience methods. (The ``Broker.actor`` decorator
for example.)
Configuration
-------------
You can change the configuration options for your broker by passing
keyword arguments to the constructor, or by setting corresponding
values for the ``DRAMATIQ_BROKER_*`` set of keys in the app
config. For example, you can do either::
from flask_melodramatiq import RabbitmqBroker
broker = RabbitmqBroker(
url='amqp://mybroker:5672', confirm_delivery=True)
or you can put this in your app config::
DRAMATIQ_BROKER_URL = 'amqp://mybroker:5672'
DRAMATIQ_BROKER_CONFIRM_DELIVERY = True
If the configuration values passed to the constructor are different
from the ones set in the app config, the later take precedence. You
can even set/override the type of the broker in the app config::
from flask_melodramatiq import Broker
broker = Broker() # Broker's type is not specified here.
and instead, specify the type in the app config::
DRAMATIQ_BROKER_CLASS = 'StubBroker'
This feature can be quite useful when testing your code.
Starting workers
----------------
With Flask-Melodramatiq you have the whole power of Dramatiq's CLI on
on your disposal. For example, to start worker processes for your
broker instance you may run::
$ dramatiq wsgi:broker
and in ``wsgi.py`` you may have something like this::
from myapp import create_app, broker
app = create_app()
You may have as many broker instances as you want, but you need to
start each one of them with a separate command.
Installation
------------
You can install Flask-Melodramatiq with ``pip``::
$ pip install Flask-Melodramatiq
You can read the docs `here`_.
.. _here: https://flask-melodramatiq.readthedocs.io/en/latest/
.. _Dramatiq: https://github.com/Bogdanp/dramatiq
.. _Flask: http://flask.pocoo.org/
نحوه نصب
نصب پکیج whl Flask-Melodramatiq-1.0:
pip install Flask-Melodramatiq-1.0.whl
نصب پکیج tar.gz Flask-Melodramatiq-1.0:
pip install Flask-Melodramatiq-1.0.tar.gz