Client¶
A Client is a high-level abstraction on top of Zaqar features. It exposes the server features with an object-oriented interface, which encourages dot notation and automatic, but lazy, resources allocation. A Client allows you to control everything, from public interfaces to admin endpoints.
To create a Client instance, you supply an url pointing to the server and a version number:
from zaqarclient.queues import client
cli = client.Client('http://zaqar.example.com:8888/', version=2)
which will load the appropriate client based on the specified version. Optionally, you can also supply a config dictionary:
from zaqarclient.queues import client
cli = client.Client('http://zaqar.example.com:8888/',
version=2, conf={})
The arguments passed to this function will be passed to the client instances as well.
It’s recommended to use Client instances instead of accessing the lower level API as it has been designed to ease the interaction with the server and it gives enough control for the most common cases.
A simple example for accessing an existing queue through a client instance - based on the API v2 - would look like:
from zaqarclient.queues import client
cli = client.Client('http://zaqar.example.com:8888/', version=2)
queue = cli.queue('my_queue')
Through the queue instance will be then possible to access all the features associated with the queue itself like posting messages, getting message and deleting messages.
As mentioned previously in this documentation, a client instance allows you to also access admin endpoints, for example:
from zaqarclient.queues import client
cli = client.Client('http://zaqar.example.com:8888/', version=2)
flavor = cli.flavor('tasty',
pool='my-pool-group',
auto_create=True)
flavor.delete()
Client uses the lower-level API to access the server, which means anything you can do with this client instance can be done by accessing the underlying API, although not recommended.
Client Object Reference¶
This is the reference documentation for all API version.
API v1 and v1.1:
-
class
Client(url=None, version=1, conf=None, session=None)¶ Client base class
Parameters: - url (six.text_type) – Zaqar’s instance base url.
- version (int) – API Version pointing to.
- conf (oslo_config.cfg.CONF) – CONF object.
- session – keystone session. But it’s just place holder, we wont’ support it in v1.
-
flavor(*args, **kwargs)¶ Returns a flavor instance
Parameters: ref (six.text_type) – Flavor’s reference name. Returns: A flavor instance Return type: flavor.Flavor
-
flavors(*args, **kwargs)¶ Gets a list of flavors from the server
Parameters: params (dict.) – Filters to use for getting flavors Returns: A list of flavors Return type: list
-
follow(ref)¶ Follows ref.
This method instanciates a new request instance and requests ref. It is intended to be used to follow a reference href gotten from links sections in responses like queues’ lists.
Params ref: The reference path.
-
health()¶ Gets the health status of Zaqar server.
-
pool(ref, **kwargs)¶ Returns a pool instance
Parameters: ref (six.text_type) – Pool’s reference name. Returns: A pool instance Return type: pool.Pool
-
pools(**params)¶ Gets a list of pools from the server
Parameters: params (dict.) – Filters to use for getting pools Returns: A list of pools Return type: list
-
queue(ref, **kwargs)¶ Returns a queue instance
Parameters: ref (six.text_type) – Queue’s reference id. Returns: A queue instance Return type: queues.Queue
-
queues(**params)¶ Gets a list of queues from the server
Returns: A list of queues Return type: list
-
transport()¶ Gets a transport based the api url and version.
Return type: zaqarclient.transport.base.Transport
API v2.0:
-
class
Client(url=None, version=2, conf=None, session=None)¶ Client base class
Parameters: - url (six.text_type) – Zaqar’s instance base url.
- version (int) – API Version pointing to.
- conf (oslo_config.cfg.CONF) – CONF object.
-
health(*args, **kwargs)¶ Gets the detailed health status of Zaqar server.
-
homedoc(*args, **kwargs)¶ Get the detailed resource doc of Zaqar server
-
ping()¶ Gets the health status of Zaqar server.
-
queue(ref, **kwargs)¶ Returns a queue instance
Parameters: ref (six.text_type) – Queue’s reference id. Returns: A queue instance Return type: queues.Queue
-
subscription(*args, **kwargs)¶ Returns a subscription instance
Parameters: queue_name (six.text_type) – Name of the queue to subscribe to. Returns: A subscription instance Return type: subscription.Subscription
-
subscriptions(*args, **kwargs)¶ Gets a list of subscriptions from the server
Parameters: params (dict.) – Filters to use for getting subscriptions Returns: A list of subscriptions Return type: list
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