jumpserver/apps/common/README.md

## Celery usage 


Jumpserver use celery to run task async. Using redis as the broker, so
you should run a redis instance

#### Run redis

	$ yum -y install redis 
	
	or
	
	$ docker run -name jumpserver-redis -d -p 6379:6379 redis redis-server


#### Write tasks in app_name/tasks.py

ops/tasks.py

```
from __future__ import absolute_import

import time
from celery import shared_task
from common import celery_app


@shared_task
def longtime_add(x, y):
    print 'long time task begins'
    # sleep 5 seconds
    time.sleep(5)
    print 'long time task finished'
    return x + y
    

@celery_app.task(name='hello-world')
def hello():
    print 'hello world!'
  
```

#### Run celery in development 

```
$ cd apps
$ celery -A common worker -l info 
```

#### Test using task

```
$ ./manage.py shell
>>> from ops.tasks import longtime_add
>>> res = longtime_add.delay(1, 2)
>>> res.get()
```