1fe2e7f8d3
In the process of unification of the clients code we should reuse common functionality from Oslo. Resource() class from ceilometer duplicates Oslo funclionality, so we replace it with inheritance Change-Id: I4e4b83252cdc87e8484d15e351cd5dab08f3ed8a
95 lines
2.7 KiB
Python
95 lines
2.7 KiB
Python
# Copyright 2012 OpenStack Foundation
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# All Rights Reserved.
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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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"""
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Base utilities to build API operation managers and objects on top of.
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"""
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import copy
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from ceilometerclient.openstack.common.apiclient import base
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# Python 2.4 compat
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try:
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all
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except NameError:
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def all(iterable):
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return True not in (not x for x in iterable)
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def getid(obj):
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"""Abstracts the common pattern of allowing both an object or an
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object's ID (UUID) as a parameter when dealing with relationships.
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"""
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try:
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return obj.id
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except AttributeError:
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return obj
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class Manager(object):
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"""Managers interact with a particular type of API
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(samples, meters, alarms, etc.) and provide CRUD operations for them.
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"""
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resource_class = None
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def __init__(self, api):
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self.api = api
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def _create(self, url, body):
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resp, body = self.api.json_request('POST', url, body=body)
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if body:
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return self.resource_class(self, body)
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def _list(self, url, response_key=None, obj_class=None, body=None,
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expect_single=False):
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resp, body = self.api.json_request('GET', url)
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if obj_class is None:
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obj_class = self.resource_class
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if response_key:
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try:
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data = body[response_key]
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except KeyError:
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return []
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else:
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data = body
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if expect_single:
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data = [data]
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return [obj_class(self, res, loaded=True) for res in data if res]
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def _update(self, url, body, response_key=None):
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resp, body = self.api.json_request('PUT', url, body=body)
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# PUT requests may not return a body
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if body:
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return self.resource_class(self, body)
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def _delete(self, url):
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self.api.raw_request('DELETE', url)
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class Resource(base.Resource):
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"""A resource represents a particular instance of an object (tenant, user,
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etc). This is pretty much just a bag for attributes.
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:param manager: Manager object
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:param info: dictionary representing resource attributes
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:param loaded: prevent lazy-loading if set to True
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"""
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def to_dict(self):
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return copy.deepcopy(self._info)
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