https://github.com/letiantian/rq-source
源码注释 https://github.com/nvie/rq
https://github.com/letiantian/rq-source
Last synced: 3 months ago
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源码注释 https://github.com/nvie/rq
- Host: GitHub
- URL: https://github.com/letiantian/rq-source
- Owner: letiantian
- License: other
- Created: 2015-11-03T13:34:59.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2022-04-05T06:29:06.000Z (about 3 years ago)
- Last Synced: 2025-01-13T03:24:49.290Z (5 months ago)
- Language: Python
- Homepage:
- Size: 111 KB
- Stars: 2
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.md
- License: LICENSE
Awesome Lists containing this project
README
[如何使用redis构建异步任务处理程序](https://www.letianbiji.com/ds/2015-11-03-redis-async-task.html)
---
RQ (_Redis Queue_) is a simple Python library for queueing jobs and processing
them in the background with workers. It is backed by Redis and it is designed
to have a low barrier to entry. It should be integrated in your web stack
easily.
RQ requires Redis >= 2.7.0.
Full documentation can be found [here][d].
## Getting started
First, run a Redis server, of course:
```console
$ redis-server
```
To put jobs on queues, you don't have to do anything special, just define
your typically lengthy or blocking function:
```python
import requests
def count_words_at_url(url):
"""Just an example function that's called async."""
resp = requests.get(url)
return len(resp.text.split())
```
You do use the excellent [requests][r] package, don't you?
Then, create an RQ queue:
```python
from rq import Queue, use_connection
use_connection()
q = Queue()
```
And enqueue the function call:
```python
from my_module import count_words_at_url
result = q.enqueue(count_words_at_url, 'http://nvie.com')
```
For a more complete example, refer to the [docs][d]. But this is the essence.
### The worker
To start executing enqueued function calls in the background, start a worker
from your project's directory:
```console
$ rqworker
*** Listening for work on default
Got count_words_at_url('http://nvie.com') from default
Job result = 818
*** Listening for work on default
```
That's about it.
## Installation
Simply use the following command to install the latest released version:
pip install rq
If you want the cutting edge version (that may well be broken), use this:
pip install -e [email protected]:nvie/rq.git@master#egg=rq
## Project history
This project has been inspired by the good parts of [Celery][1], [Resque][2]
and [this snippet][3], and has been created as a lightweight alternative to the
heaviness of Celery or other AMQP-based queueing implementations.
[r]: http://python-requests.org
[d]: http://python-rq.org/
[m]: http://pypi.python.org/pypi/mailer
[p]: http://docs.python.org/library/pickle.html
[1]: http://www.celeryproject.org/
[2]: https://github.com/resque/resque
[3]: http://flask.pocoo.org/snippets/73/