119 lines
3.3 KiB
Python
119 lines
3.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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import logging
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LOG = logging.getLogger(__name__)
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class Resource(object):
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resource_name = 'Something'
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defaults = {}
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def __init__(self, manager, info):
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self.manager = manager
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self._info = info
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self._set_defaults(info)
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self._add_details(info)
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def _set_defaults(self, info):
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for name, value in self.defaults.iteritems():
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if name not in info:
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info[name] = value
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def _add_details(self, info):
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for (k, v) in info.iteritems():
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try:
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setattr(self, k, v)
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self._info[k] = v
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except AttributeError:
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# In this case we already defined the attribute on the class
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pass
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def __str__(self):
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return '%s %s' % (self.resource_name, str(self._info))
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def _check_items(obj, searches):
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try:
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return all(getattr(obj, attr) == value for (attr, value) in searches)
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except AttributeError:
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return False
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#TODO(nkonovalov) handle response body in case of error
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class ResourceManager(object):
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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 find(self, **kwargs):
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return [i for i in self.list() if _check_items(i, kwargs.items())]
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def _create(self, url, data):
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resp = self.api.client.post(url, json.dumps(data))
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if resp.status_code != 202:
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self._raise_api_exception(resp)
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def _update(self, url, data):
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resp = self.api.client.put(url, json.dumps(data))
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if resp.status_code != 202:
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self._raise_api_exception(resp)
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def _list(self, url, response_key):
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resp = self.api.client.get(url)
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if resp.status_code == 200:
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data = resp.json()[response_key]
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return [self.resource_class(self, res)
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for res in data]
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else:
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self._raise_api_exception(resp)
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def _get(self, url, response_key=None):
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resp = self.api.client.get(url)
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if resp.status_code == 200:
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if response_key is not None:
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data = resp.json()[response_key]
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else:
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data = resp.json()
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return self.resource_class(self, data)
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else:
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self._raise_api_exception(resp)
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def _delete(self, url):
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resp = self.api.client.delete(url)
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if resp.status_code != 204:
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self._raise_api_exception(resp)
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def _plurify_resource_name(self):
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return self.resource_class.resource_name + 's'
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def _raise_api_exception(self, resp):
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error_data = resp.json()
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raise APIException(error_data["error_message"])
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class APIException(Exception):
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pass
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