6d0391ceb3
This patch implements methods for every queue operation. The 2
operations left out in this patch are: queue_list and queue_stats.
This patch makes the client, officially, usable as a library. An example
of how this could be use:
client = Client()
queue = client.queue('my_queue') # Creates the queue automatically
queue.metadata() # Get's metadata from the queue
queue.metadata(dict(new_meta='Yo yo!'))
queue.delete()
Metadata was implemented as method instead of as a property to make it
explicit that both get and set do something in the remote server.
The client API was implemented in 2 separate levels. The highest level
is the one shown in the example above, which allows users to just query
Marconi instances without worrying about the transport, request build
process, references, deserealization and what not. The lowest instead,
allows the user to control every bit of the communication process - the
user can pick a specific transport, or pass custom params. For example -
which will make it possible to have other implementations around that
API in addition to the asynchronous support. Example of the API:
transport = http.HttpTransport(cfg.CONF)
request = request.prepare_request(cfg.CONF,
endpoint='http://localhost:8888')
core.queue_create(transport, request, 1, callback=my_callback)
There are tons of things to do and improve. For example:
* The way config params are registered may work when using
marconiclient as a library but they won't when using it as a CLI
tool.
* This code lacks of logging.
* Handling of 20(1|4) is missing.
Partially-Implements blueprint python-marconiclient-v1
Implements blueprint queues-management
Change-Id: I8bdc8a4aff8ea22b5673bc7440e07796ecaf34cc
34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
# Copyright 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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__all__ = ['MarconiError', 'DriverLoadFailure', 'InvalidOperation']
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class MarconiError(Exception):
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"""Base class for errors."""
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class DriverLoadFailure(MarconiError):
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"""Raised if a transport driver can't be loaded."""
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def __init__(self, driver, ex):
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msg = 'Failed to load transport driver "%s": %s' % (driver, ex)
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super(DriverLoadFailure, self).__init__(msg)
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self.driver = driver
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self.ex = ex
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class InvalidOperation(MarconiError):
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"""Raised when attempted a non existent operation."""
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