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awx/awx/lib/site-packages/pyrax/service_catalog.py

61 lines
2.2 KiB
Python

# Copyright 2011 OpenStack LLC.
# Copyright 2011, Piston Cloud Computing, Inc.
# Copyright 2012, Rackspace
#
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import pyrax.exceptions as exc
class ServiceCatalog(object):
"""Helper methods for dealing with a Keystone Service Catalog."""
def __init__(self, resource_dict):
self.catalog = resource_dict
def get_token(self):
"""Extracts and returns the authentication token."""
return self.catalog["access"]["token"]["id"]
def url_for(self, attr=None, filter_value=None,
service_type=None, endpoint_type="publicURL",
service_name=None, volume_service_name=None):
"""Fetches the public URL from the given service for
a particular endpoint attribute. If none given, returns
the first. See tests for sample service catalog."""
matching_endpoints = []
# We don't always get a service catalog back ...
if "serviceCatalog" not in self.catalog["access"]:
return None
# Full catalog ...
catalog = self.catalog["access"]["serviceCatalog"]
for service in catalog:
if service.get("type") != service_type:
continue
endpoints = service["endpoints"]
for endpoint in endpoints:
if not filter_value or endpoint.get(attr) == filter_value:
endpoint["serviceName"] = service.get("name")
matching_endpoints.append(endpoint)
if not matching_endpoints:
raise exc.EndpointNotFound()
elif len(matching_endpoints) > 1:
raise exc.AmbiguousEndpoints(endpoints=matching_endpoints)
else:
return matching_endpoints[0][endpoint_type]