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Utilities for using ZooKeeper from a Django project.

Project description

# djkeeper: Utilities for using ZooKeeper in a Django project

## Installing

Either install the latest relase from PYPI:

$ pip install djkeeper

... or get the latest development version from GitHub:

$ pip install

Additionally, djkeeper requires a working installation of the official low level Python ZooKeeper bindings. These can either be built from source (recommended, explanation below), or
you could install the statically compiled version [zc-zookeeper-static]( from PYPI, which may or may not work on your architecture/OS, and may
or may not be the latest available ZooKeeper version.

### Installing ZooKeeper on OS X (homebrew)

If you don't have homebrew, follow the Linux installation below, skipping "ldconfig", otherwise, use homebrew to install zookeeper with the ``--python`` flag:

$ brew install --python zookeeper

### Installing ZooKeeper on Linux

Download and unpack the latest release of ZooKeeper from

$ tar -zxvf zookeeper-3.4.2.tar.gz

Build the C bindings:

$ cd zookeeper-3.4.2/src/c
$ ./configure --prefix=/usr/local
$ make
$ sudo make install
$ ldconfig

Build and install the python bindings:

$ cd ../contrib/zkpython
$ ant install

## Running the test-suite

The test suite assumes you have a ZooKeeper server running on localhost:22181:

$ cd example
$ export ZOOCFGDIR=$(pwd) zkServer start-foreground

zkServer / is found in the ZooKeeper installation directory.

The tests can then be run via the script:

$ python nosetests -with-doctest --verbosity=2

## Example usage with Django

See for more detailed usage of the client object instance.

### Configuring:

ZooKeeper clients are configured in your ```` file under the configuration key ``DJKEEPER``:

DJKEEPER = dict(
clients = dict(
client_name = dict(
servers = 'localhost:22181', # defaults to localhost:2181
reconnect = True # defaults to True, which means the client should reconnect if the connection is lost

Multiple named clients can be configured this way.

### Using in a view:

For example, in ````:

from django.http import HttpResponse
from djkeeper import manager

def index(request):
client = manager.ZooKeeperManager.get_or_create_client('client_name')
root_children = client.get_children('/')
return HttpResponse('Root children: {0}'.format(root_children))

``manager.ZooKeeperManager`` accepts the following keyword parameters:

* ``auto_connect``: Whether to call .connect() on a newly created client before returning it. Defaults to true.
* ``wait_until_connected``: Whether to block until the client state becomes ``connected`` before returning the client. Defaults to true.
* ``wait_until_connected_timeout``: How long the call is allowed to block (in seconds) before a ``pykeeper.TimeoutException`` is raised. Defaults to ``None``, which means no timeout.

### Admin-overview

First, add ``djkeeper`` to your list of ``INSTALLED_APPS`` in, then
add the following route to your

url(r'^admin/djkeeper/', 'djkeeper.views.index'),

Or, if you use [django-adminplus](, an overview over the clients is automatically
added to the admin panel when you call ``admin.autodiscover()``. In this case, the custom route should NOT be added to your

## License

MIT licensed, see LICENSE for details.

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