121 lines
3.1 KiB
Python
121 lines
3.1 KiB
Python
# Copyright 2013 Cloudscaling Group, 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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import abc
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from webob import exc
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from gceapi.api import base_api
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from gceapi.api import utils
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class Scope(object):
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"""Scope that contains resource.
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The following scopes exists: global, aggregated, zones, regions.
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"""
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_type = None
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_collection = None
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_name = None
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@abc.abstractmethod
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def __init__(self, scope_name):
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self._name = scope_name
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def get_type(self):
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return self._type
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def get_name(self):
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return self._name
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def get_collection(self):
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return self._collection
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def get_path(self):
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if self._collection is not None and self._name is not None:
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return "/".join([self._collection, self._name])
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else:
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return self._type
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def get_scope_api(self):
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base_api.Singleton.get_instance(self.get_type())
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class GlobalScope(Scope):
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_type = "global"
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def __init__(self):
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super(GlobalScope, self).__init__(None)
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class AggregatedScope(Scope):
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_type = "aggregated"
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def __init__(self):
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super(AggregatedScope, self).__init__(None)
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class ZoneScope(Scope):
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_type = "zone"
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_collection = utils.get_collection_name(_type)
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def __init__(self, scope_name):
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super(ZoneScope, self).__init__(scope_name)
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class RegionScope(Scope):
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_type = "region"
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_collection = utils.get_collection_name(_type)
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def __init__(self, scope_name):
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super(RegionScope, self).__init__(scope_name)
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def construct(scope_type, scope_id):
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if scope_type == "zone":
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return ZoneScope(scope_id)
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elif scope_type == "region":
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return RegionScope(scope_id)
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elif scope_type == "global":
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return GlobalScope()
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elif scope_type == "aggregated":
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return AggregatedScope()
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return None
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def construct_from_path(path, scope_id):
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path_info = [item for item in path.split("/") if item]
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path_count = len(path_info)
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if path_count == 0:
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raise exc.HTTPBadRequest(comment="Bad path %s" % path)
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if path_count < 3:
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return None
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collection_or_type = path_info[1]
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if collection_or_type in ("zones", "regions") and scope_id is None:
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return None
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if collection_or_type == "zones":
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return ZoneScope(scope_id)
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elif collection_or_type == "regions":
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return RegionScope(scope_id)
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elif collection_or_type == "global":
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return GlobalScope()
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elif collection_or_type == "aggregated":
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return AggregatedScope()
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raise exc.HTTPBadRequest(comment="Bad path %s" % path)
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