201 lines
7.1 KiB
Python
201 lines
7.1 KiB
Python
# 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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"""
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:class:`~openstack.profile.Profile` is the class that is used to
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define the various preferences for different services. The preferences that
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are currently supported are service name, region, version and interface.
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The :class:`~openstack.profile.Profile` and the
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:class:`~openstack.connection.Connection` classes are the most important
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user facing classes.
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Examples
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--------
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The :class:`~openstack.profile.Profile` class is constructed
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with no arguments.
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Set Methods
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~~~~~~~~~~~
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A user's preferences are set based on the service type. Service type would
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normally be something like 'compute', 'identity', 'object-store', etc.::
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from openstack import profile
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prof = profile.Profile()
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prof.set_name('compute', 'matrix')
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prof.set_region(prof.ALL, 'zion')
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prof.set_version('identity', 'v3')
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prof.set_interface('object-store', 'internal')
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for service in prof.get_services():
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print str(prof.get_preference(service.service_type))
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The resulting preference print out would look something like::
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service_type=compute,region=zion,service_name=matrix
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service_type=network,region=zion
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service_type=database,region=zion
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service_type=image,region=zion
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service_type=metering,region=zion
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service_type=orchestration,region=zion
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service_type=object-store,interface=internal,region=zion
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service_type=identity,region=zion,version=v3
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"""
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import logging
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import six
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from openstack.block_store import block_store_service
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from openstack.cluster import cluster_service
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from openstack.compute import compute_service
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from openstack.database import database_service
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from openstack import exceptions
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from openstack.identity import identity_service
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from openstack.image import image_service
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from openstack.key_management import key_management_service
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from openstack.message import message_service
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from openstack.metric import metric_service
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from openstack import module_loader
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from openstack.network import network_service
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from openstack.object_store import object_store_service
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from openstack.orchestration import orchestration_service
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from openstack.telemetry import telemetry_service
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_logger = logging.getLogger(__name__)
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class Profile(object):
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ALL = "*"
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"""Wildcard service identifier representing all services."""
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def __init__(self, extensions=None):
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"""User preference for each service.
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:param list extensions: List of entry point namespace to load.
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Create a new :class:`~openstack.profile.Profile`
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object with no preferences defined, but knowledge of the services.
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Services are identified by their service type, e.g.: 'identity',
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'compute', etc.
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"""
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self._preferences = {}
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self._services = {}
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self._add_service(cluster_service.ClusterService())
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self._add_service(compute_service.ComputeService())
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self._add_service(database_service.DatabaseService())
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self._add_service(identity_service.IdentityService())
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self._add_service(image_service.ImageService())
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self._add_service(metric_service.MetricService())
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self._add_service(network_service.NetworkService())
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self._add_service(object_store_service.ObjectStoreService())
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self._add_service(orchestration_service.OrchestrationService())
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self._add_service(key_management_service.KeyManagementService())
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self._add_service(telemetry_service.TelemetryService())
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self._add_service(block_store_service.BlockStoreService())
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self._add_service(message_service.MessageService())
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if extensions:
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for extension in extensions:
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self._load_extension(extension)
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self.service_names = sorted(self._services.keys())
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def __repr__(self):
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return repr(self._preferences)
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def _add_service(self, serv):
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serv.set_interface(None)
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self._services[serv.service_type] = serv
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def _load_extension(self, namespace):
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"""Load a service extension.
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:param str namespace: Entry point namespace
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"""
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services = module_loader.load_service_extensions(namespace)
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for service_type in services:
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if service_type in self._services:
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_logger.debug("Overriding %s with %s", service_type,
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services[service_type])
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self._add_service(services[service_type])
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def get_preference(self, service):
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"""Get a service preference.
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:param str service: Desired service type.
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"""
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return self._preferences.get(service, None)
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def get_services(self):
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"""Get a list of all the known services."""
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services = []
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for name, service in six.iteritems(self._services):
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services.append(service)
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return services
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def _get_service(self, service):
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"""Get a valid service filter."""
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serv = self._services.get(service, None)
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if serv is not None:
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self._preferences[service] = serv
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return serv
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msg = ("Service %s not in list of valid services: %s" %
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(service, self.service_names))
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raise exceptions.SDKException(msg)
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def set_name(self, service, name):
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"""Set the desired name for the specified service.
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:param str service: Service type.
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:param str name: Desired service name.
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"""
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if service == self.ALL:
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services = self.service_names
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else:
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services = [service]
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for service in services:
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self._get_service(service).service_name = name
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def set_region(self, service, region):
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"""Set the desired region for the specified service.
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:param str service: Service type.
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:param str region: Desired service region.
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"""
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if service == self.ALL:
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services = self.service_names
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else:
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services = [service]
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for service in services:
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self._get_service(service).region = region
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def set_version(self, service, version):
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"""Set the desired version for the specified service.
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:param str service: Service type.
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:param str version: Desired service version.
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"""
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self._get_service(service).version = version
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def set_interface(self, service, interface):
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"""Set the desired interface for the specified service.
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:param str service: Service type.
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:param str interface: Desired service interface.
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"""
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if service == self.ALL:
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services = self.service_names
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else:
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services = [service]
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for service in services:
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self._get_service(service).set_interface(interface)
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