python-novaclient/novaclient/service_catalog.py
2011-10-25 09:34:23 -07:00

60 lines
2.1 KiB
Python

# Copyright 2011 OpenStack LLC.
# Copyright 2011, Piston Cloud Computing, Inc.
#
# 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 novaclient.exceptions
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):
return self.catalog['access']['token']['id']
def url_for(self, attr=None, filter_value=None,
service_type='compute', endpoint_type='publicURL'):
"""Fetch the public URL from the Compute service for
a particular endpoint attribute. If none given, return
the first. See tests for sample service catalog."""
if 'endpoints' in self.catalog:
# We have a bastardized service catalog. Treat it special. :/
for endpoint in self.catalog['endpoints']:
if not filter_value or endpoint[attr] == filter_value:
return endpoint[endpoint_type]
raise novaclient.exceptions.EndpointNotFound()
# We don't always get a service catalog back ...
if not 'serviceCatalog' in self.catalog['access']:
return None
# Full catalog ...
catalog = self.catalog['access']['serviceCatalog']
for service in catalog:
if service['type'] != service_type:
continue
endpoints = service['endpoints']
for endpoint in endpoints:
if not filter_value or endpoint[attr] == filter_value:
return endpoint[endpoint_type]
raise novaclient.exceptions.EndpointNotFound()