87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
# Copyright 2016 Nexenta Systems, Inc.
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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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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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import requests
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from cinder import exception
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from cinder.utils import retry
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LOG = logging.getLogger(__name__)
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TIMEOUT = 60
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class NexentaJSONProxy(object):
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retry_exc_tuple = (requests.exceptions.ConnectionError,)
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def __init__(self, scheme, host, port, path, user, password, auto=False,
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obj=None, method=None, session=None):
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if session:
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self.session = session
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else:
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self.session = requests.Session()
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self.session.auth = (user, password)
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self.session.headers.update({'Content-Type': 'application/json'})
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self.scheme = scheme.lower()
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self.host = host
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self.port = port
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self.path = path
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self.user = user
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self.password = password
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self.auto = auto
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self.obj = obj
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self.method = method
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def __getattr__(self, name):
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if not self.obj:
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obj, method = name, None
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elif not self.method:
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obj, method = self.obj, name
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else:
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obj, method = '%s.%s' % (self.obj, self.method), name
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return NexentaJSONProxy(self.scheme, self.host, self.port, self.path,
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self.user, self.password, self.auto, obj,
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method, self.session)
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@property
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def url(self):
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return '%s://%s:%s%s' % (self.scheme, self.host, self.port, self.path)
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def __hash__(self):
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return self.url.__hash__()
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def __repr__(self):
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return 'NMS proxy: %s' % self.url
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@retry(retry_exc_tuple, retries=6)
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def __call__(self, *args):
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data = jsonutils.dumps({
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'object': self.obj,
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'method': self.method,
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'params': args
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})
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LOG.debug('Sending JSON data: %s', data)
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r = self.session.post(self.url, data=data, timeout=TIMEOUT)
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response = r.json()
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LOG.debug('Got response: %s', response)
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if response.get('error') is not None:
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message = response['error'].get('message', '')
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raise exception.NexentaException(message)
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return response.get('result')
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