text: # Copyright 2011, OpenStack Foundation
  # Copyright 2012, Red Hat, Inc.
  # Copyright 2013 IBM Corp.
  #
  #    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 abc
  
  import glance_store
  from oslo_config import cfg
  from oslo_log import log as logging
  import oslo_messaging
  from oslo_utils import encodeutils
  from oslo_utils import excutils
  import six
  import webob
  
  from glance.common import exception
  from glance.common import timeutils
  from glance.domain import proxy as domain_proxy
  from glance.i18n import _, _LE
  
  
  notifier_opts = [
      cfg.StrOpt('default_publisher_id',
                 default="image.localhost",
                 help=_("""
  Default publisher_id for outgoing Glance notifications.
  
  This is the value that the notification driver will use to identify
  messages for events originating from the Glance service. Typically,
  this is the hostname of the instance that generated the message.
  
  Possible values:
      * Any reasonable instance identifier, for example: image.host1
  
  Related options:
      * None
  
  """)),
      cfg.ListOpt('disabled_notifications',
                  default=[],
                  help=_("""
  List of notifications to be disabled.
  
  Specify a list of notifications that should not be emitted.
  A notification can be given either as a notification type to
  disable a single event notification, or as a notification group
  prefix to disable all event notifications within a group.
  
  Possible values:
      A comma-separated list of individual notification types or
      notification groups to be disabled. Currently supported groups:
          * image
          * image.member
          * task
          * metadef_namespace
          * metadef_object
          * metadef_property
          * metadef_resource_type
          * metadef_tag
      For a complete listing and description of each event refer to:
      http://docs.openstack.org/developer/glance/notifications.html
  
      The values must be specified as: <group_name>.<event_name>
      For example: image.create,task.success,metadef_tag
  
  Related options:
      * None
  
  """)),
  ]
  
  CONF = cfg.CONF
  CONF.register_opts(notifier_opts)
  
  LOG = logging.getLogger(__name__)
  
  
  def set_defaults(control_exchange='glance'):
      oslo_messaging.set_transport_defaults(control_exchange)
  
  
  def get_transport():
      return oslo_messaging.get_notification_transport(CONF)
  
  
  class Notifier(object):
      """Uses a notification strategy to send out messages about events."""
  
      def __init__(self):
          publisher_id = CONF.default_publisher_id
          self._transport = get_transport()
          self._notifier = oslo_messaging.Notifier(self._transport,
                                                   publisher_id=publisher_id)
  
      def warn(self, event_type, payload):
          self._notifier.warn({}, event_type, payload)
  
      def info(self, event_type, payload):
          self._notifier.info({}, event_type, payload)
  
      def error(self, event_type, payload):
          self._notifier.error({}, event_type, payload)
  
  
  def _get_notification_group(notification):
      return notification.split('.', 1)[0]
  
  
  def _is_notification_enabled(notification):
      disabled_notifications = CONF.disabled_notifications
      notification_group = _get_notification_group(notification)
  
      notifications = (notification, notification_group)
      for disabled_notification in disabled_notifications:
          if disabled_notification in notifications:
              return False
  
      return True
  
  
  def _send_notification(notify, notification_type, payload):
      if _is_notification_enabled(notification_type):
          notify(notification_type, payload)
  
  
  def format_image_notification(image):
      """
      Given a glance.domain.Image object, return a dictionary of relevant
      notification information. We purposely do not include 'location'
      as it may contain credentials.
      """
      return {
          'id': image.image_id,
          'name': image.name,
          'status': image.status,
          'created_at': timeutils.isotime(image.created_at),
          'updated_at': timeutils.isotime(image.updated_at),
          'min_disk': image.min_disk,
          'min_ram': image.min_ram,
          'protected': image.protected,
          'checksum': image.checksum,
          'owner': image.owner,
          'disk_format': image.disk_format,
          'container_format': image.container_format,
          'size': image.size,
          'virtual_size': image.virtual_size,
          'is_public': image.visibility == 'public',
          'visibility': image.visibility,
          'properties': dict(image.extra_properties),
          'tags': list(image.tags),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_image_member_notification(image_member):
      """Given a glance.domain.ImageMember object, return a dictionary of relevant
      notification information.
      """
      return {
          'image_id': image_member.image_id,
          'member_id': image_member.member_id,
          'status': image_member.status,
          'created_at': timeutils.isotime(image_member.created_at),
          'updated_at': timeutils.isotime(image_member.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_task_notification(task):
      # NOTE(nikhil): input is not passed to the notifier payload as it may
      # contain sensitive info.
      return {
          'id': task.task_id,
          'type': task.type,
          'status': task.status,
          'result': None,
          'owner': task.owner,
          'message': None,
          'expires_at': timeutils.isotime(task.expires_at),
          'created_at': timeutils.isotime(task.created_at),
          'updated_at': timeutils.isotime(task.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_metadef_namespace_notification(metadef_namespace):
      return {
          'namespace': metadef_namespace.namespace,
          'namespace_old': metadef_namespace.namespace,
          'display_name': metadef_namespace.display_name,
          'protected': metadef_namespace.protected,
          'visibility': metadef_namespace.visibility,
          'owner': metadef_namespace.owner,
          'description': metadef_namespace.description,
          'created_at': timeutils.isotime(metadef_namespace.created_at),
          'updated_at': timeutils.isotime(metadef_namespace.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_metadef_object_notification(metadef_object):
      object_properties = metadef_object.properties or {}
      properties = []
      for name, prop in six.iteritems(object_properties):
          object_property = _format_metadef_object_property(name, prop)
          properties.append(object_property)
  
      return {
          'namespace': metadef_object.namespace,
          'name': metadef_object.name,
          'name_old': metadef_object.name,
          'properties': properties,
          'required': metadef_object.required,
          'description': metadef_object.description,
          'created_at': timeutils.isotime(metadef_object.created_at),
          'updated_at': timeutils.isotime(metadef_object.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def _format_metadef_object_property(name, metadef_property):
      return {
          'name': name,
          'type': metadef_property.type or None,
          'title': metadef_property.title or None,
          'description': metadef_property.description or None,
          'default': metadef_property.default or None,
          'minimum': metadef_property.minimum or None,
          'maximum': metadef_property.maximum or None,
          'enum': metadef_property.enum or None,
          'pattern': metadef_property.pattern or None,
          'minLength': metadef_property.minLength or None,
          'maxLength': metadef_property.maxLength or None,
          'confidential': metadef_property.confidential or None,
          'items': metadef_property.items or None,
          'uniqueItems': metadef_property.uniqueItems or None,
          'minItems': metadef_property.minItems or None,
          'maxItems': metadef_property.maxItems or None,
          'additionalItems': metadef_property.additionalItems or None,
      }
  
  
  def format_metadef_property_notification(metadef_property):
      schema = metadef_property.schema
  
      return {
          'namespace': metadef_property.namespace,
          'name': metadef_property.name,
          'name_old': metadef_property.name,
          'type': schema.get('type'),
          'title': schema.get('title'),
          'description': schema.get('description'),
          'default': schema.get('default'),
          'minimum': schema.get('minimum'),
          'maximum': schema.get('maximum'),
          'enum': schema.get('enum'),
          'pattern': schema.get('pattern'),
          'minLength': schema.get('minLength'),
          'maxLength': schema.get('maxLength'),
          'confidential': schema.get('confidential'),
          'items': schema.get('items'),
          'uniqueItems': schema.get('uniqueItems'),
          'minItems': schema.get('minItems'),
          'maxItems': schema.get('maxItems'),
          'additionalItems': schema.get('additionalItems'),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_metadef_resource_type_notification(metadef_resource_type):
      return {
          'namespace': metadef_resource_type.namespace,
          'name': metadef_resource_type.name,
          'name_old': metadef_resource_type.name,
          'prefix': metadef_resource_type.prefix,
          'properties_target': metadef_resource_type.properties_target,
          'created_at': timeutils.isotime(metadef_resource_type.created_at),
          'updated_at': timeutils.isotime(metadef_resource_type.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  def format_metadef_tag_notification(metadef_tag):
      return {
          'namespace': metadef_tag.namespace,
          'name': metadef_tag.name,
          'name_old': metadef_tag.name,
          'created_at': timeutils.isotime(metadef_tag.created_at),
          'updated_at': timeutils.isotime(metadef_tag.updated_at),
          'deleted': False,
          'deleted_at': None,
      }
  
  
  class NotificationBase(object):
      def get_payload(self, obj):
          return {}
  
      def send_notification(self, notification_id, obj, extra_payload=None):
          payload = self.get_payload(obj)
          if extra_payload is not None:
              payload.update(extra_payload)
  
          _send_notification(self.notifier.info, notification_id, payload)
  
  
  @six.add_metaclass(abc.ABCMeta)
  class NotificationProxy(NotificationBase):
      def __init__(self, repo, context, notifier):
          self.repo = repo
          self.context = context
          self.notifier = notifier
  
          super_class = self.get_super_class()
          super_class.__init__(self, repo)
  
      @abc.abstractmethod
      def get_super_class(self):
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class NotificationRepoProxy(NotificationBase):
      def __init__(self, repo, context, notifier):
          self.repo = repo
          self.context = context
          self.notifier = notifier
          proxy_kwargs = {'context': self.context, 'notifier': self.notifier}
  
          proxy_class = self.get_proxy_class()
          super_class = self.get_super_class()
          super_class.__init__(self, repo, proxy_class, proxy_kwargs)
  
      @abc.abstractmethod
      def get_super_class(self):
          pass
  
      @abc.abstractmethod
      def get_proxy_class(self):
          pass
  
  
  @six.add_metaclass(abc.ABCMeta)
  class NotificationFactoryProxy(object):
      def __init__(self, factory, context, notifier):
          kwargs = {'context': context, 'notifier': notifier}
  
          proxy_class = self.get_proxy_class()
          super_class = self.get_super_class()
          super_class.__init__(self, factory, proxy_class, kwargs)
  
      @abc.abstractmethod
      def get_super_class(self):
          pass
  
      @abc.abstractmethod
      def get_proxy_class(self):
          pass
  
  
  class ImageProxy(NotificationProxy, domain_proxy.Image):
      def get_super_class(self):
          return domain_proxy.Image
  
      def get_payload(self, obj):
          return format_image_notification(obj)
  
      def _format_image_send(self, bytes_sent):
          return {
              'bytes_sent': bytes_sent,
              'image_id': self.repo.image_id,
              'owner_id': self.repo.owner,
              'receiver_tenant_id': self.context.tenant,
              'receiver_user_id': self.context.user,
          }
  
      def _get_chunk_data_iterator(self, data, chunk_size=None):
          sent = 0
          for chunk in data:
              yield chunk
              sent += len(chunk)
  
          if sent != (chunk_size or self.repo.size):
              notify = self.notifier.error
          else:
              notify = self.notifier.info
  
          try:
              _send_notification(notify, 'image.send',
                                 self._format_image_send(sent))
          except Exception as err:
              msg = (_LE("An error occurred during image.send"
                         " notification: %(err)s") % {'err': err})
              LOG.error(msg)
  
      def get_data(self, offset=0, chunk_size=None):
          # Due to the need of evaluating subsequent proxies, this one
          # should return a generator, the call should be done before
          # generator creation
          data = self.repo.get_data(offset=offset, chunk_size=chunk_size)
          return self._get_chunk_data_iterator(data, chunk_size=chunk_size)
  
      def set_data(self, data, size=None):
          self.send_notification('image.prepare', self.repo)
  
          notify_error = self.notifier.error
          try:
              self.repo.set_data(data, size)
          except glance_store.StorageFull as e:
              msg = (_("Image storage media is full: %s") %
                     encodeutils.exception_to_unicode(e))
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
          except glance_store.StorageWriteDenied as e:
              msg = (_("Insufficient permissions on image storage media: %s")
                     % encodeutils.exception_to_unicode(e))
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPServiceUnavailable(explanation=msg)
          except ValueError as e:
              msg = (_("Cannot save data for image %(image_id)s: %(error)s") %
                     {'image_id': self.repo.image_id,
                      'error': encodeutils.exception_to_unicode(e)})
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPBadRequest(
                  explanation=encodeutils.exception_to_unicode(e))
          except exception.Duplicate as e:
              msg = (_("Unable to upload duplicate image data for image"
                       "%(image_id)s: %(error)s") %
                     {'image_id': self.repo.image_id,
                      'error': encodeutils.exception_to_unicode(e)})
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPConflict(explanation=msg)
          except exception.Forbidden as e:
              msg = (_("Not allowed to upload image data for image %(image_id)s:"
                       " %(error)s")
                     % {'image_id': self.repo.image_id,
                        'error': encodeutils.exception_to_unicode(e)})
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPForbidden(explanation=msg)
          except exception.NotFound as e:
              exc_str = encodeutils.exception_to_unicode(e)
              msg = (_("Image %(image_id)s could not be found after upload."
                       " The image may have been deleted during the upload:"
                       " %(error)s") % {'image_id': self.repo.image_id,
                                        'error': exc_str})
              _send_notification(notify_error, 'image.upload', msg)
              raise webob.exc.HTTPNotFound(explanation=exc_str)
          except webob.exc.HTTPError as e:
              with excutils.save_and_reraise_exception():
                  msg = (_("Failed to upload image data for image %(image_id)s"
                           " due to HTTP error: %(error)s") %
                         {'image_id': self.repo.image_id,
                          'error': encodeutils.exception_to_unicode(e)})
                  _send_notification(notify_error, 'image.upload', msg)
          except Exception as e:
              with excutils.save_and_reraise_exception():
                  msg = (_("Failed to upload image data for image %(image_id)s "
                           "due to internal error: %(error)s") %
                         {'image_id': self.repo.image_id,
                          'error': encodeutils.exception_to_unicode(e)})
                  _send_notification(notify_error, 'image.upload', msg)
          else:
              self.send_notification('image.upload', self.repo)
              self.send_notification('image.activate', self.repo)
  
  
  class ImageMemberProxy(NotificationProxy, domain_proxy.ImageMember):
      def get_super_class(self):
          return domain_proxy.ImageMember
  
  
  class ImageFactoryProxy(NotificationFactoryProxy, domain_proxy.ImageFactory):
      def get_super_class(self):
          return domain_proxy.ImageFactory
  
      def get_proxy_class(self):
          return ImageProxy
  
  
  class ImageRepoProxy(NotificationRepoProxy, domain_proxy.Repo):
      def get_super_class(self):
          return domain_proxy.Repo
  
      def get_proxy_class(self):
          return ImageProxy
  
      def get_payload(self, obj):
          return format_image_notification(obj)
  
      def save(self, image, from_state=None):
          super(ImageRepoProxy, self).save(image, from_state=from_state)
          self.send_notification('image.update', image)
  
      def add(self, image):
          super(ImageRepoProxy, self).add(image)
          self.send_notification('image.create', image)
  
      def remove(self, image):
          super(ImageRepoProxy, self).remove(image)
          self.send_notification('image.delete', image, extra_payload={
              'deleted': True, 'deleted_at': timeutils.isotime()
          })
  
  
  class ImageMemberRepoProxy(NotificationBase, domain_proxy.MemberRepo):
  
      def __init__(self, repo, image, context, notifier):
          self.repo = repo
          self.image = image
          self.context = context
          self.notifier = notifier
          proxy_kwargs = {'context': self.context, 'notifier': self.notifier}
  
          proxy_class = self.get_proxy_class()
          super_class = self.get_super_class()
          super_class.__init__(self, image, repo, proxy_class, proxy_kwargs)
  
      def get_super_class(self):
          return domain_proxy.MemberRepo
  
      def get_proxy_class(self):
          return ImageMemberProxy
  
      def get_payload(self, obj):
          return format_image_member_notification(obj)
  
      def save(self, member, from_state=None):
          super(ImageMemberRepoProxy, self).save(member, from_state=from_state)
          self.send_notification('image.member.update', member)
  
      def add(self, member):
          super(ImageMemberRepoProxy, self).add(member)
          self.send_notification('image.member.create', member)
  
      def remove(self, member):
          super(ImageMemberRepoProxy, self).remove(member)
          self.send_notification('image.member.delete', member, extra_payload={
              'deleted': True, 'deleted_at': timeutils.isotime()
          })
  
  
  class TaskProxy(NotificationProxy, domain_proxy.Task):
      def get_super_class(self):
          return domain_proxy.Task
  
      def get_payload(self, obj):
          return format_task_notification(obj)
  
      def begin_processing(self):
          super(TaskProxy, self).begin_processing()
          self.send_notification('task.processing', self.repo)
  
      def succeed(self, result):
          super(TaskProxy, self).succeed(result)
          self.send_notification('task.success', self.repo)
  
      def fail(self, message):
          super(TaskProxy, self).fail(message)
          self.send_notification('task.failure', self.repo)
  
      def run(self, executor):
          super(TaskProxy, self).run(executor)
          self.send_notification('task.run', self.repo)
  
  
  class TaskFactoryProxy(NotificationFactoryProxy, domain_proxy.TaskFactory):
      def get_super_class(self):
          return domain_proxy.TaskFactory
  
      def get_proxy_class(self):
          return TaskProxy
  
  
  class TaskRepoProxy(NotificationRepoProxy, domain_proxy.TaskRepo):
      def get_super_class(self):
          return domain_proxy.TaskRepo
  
      def get_proxy_class(self):
          return TaskProxy
  
      def get_payload(self, obj):
          return format_task_notification(obj)
  
      def add(self, task):
          result = super(TaskRepoProxy, self).add(task)
          self.send_notification('task.create', task)
          return result
  
      def remove(self, task):
          result = super(TaskRepoProxy, self).remove(task)
          self.send_notification('task.delete', task, extra_payload={
              'deleted': True, 'deleted_at': timeutils.isotime()
          })
          return result
  
  
  class TaskStubProxy(NotificationProxy, domain_proxy.TaskStub):
      def get_super_class(self):
          return domain_proxy.TaskStub
  
  
  class TaskStubRepoProxy(NotificationRepoProxy, domain_proxy.TaskStubRepo):
      def get_super_class(self):
          return domain_proxy.TaskStubRepo
  
      def get_proxy_class(self):
          return TaskStubProxy
  
  
  class MetadefNamespaceProxy(NotificationProxy, domain_proxy.MetadefNamespace):
      def get_super_class(self):
          return domain_proxy.MetadefNamespace
  
  
  class MetadefNamespaceFactoryProxy(NotificationFactoryProxy,
                                     domain_proxy.MetadefNamespaceFactory):
      def get_super_class(self):
          return domain_proxy.MetadefNamespaceFactory
  
      def get_proxy_class(self):
          return MetadefNamespaceProxy
  
  
  class MetadefNamespaceRepoProxy(NotificationRepoProxy,
                                  domain_proxy.MetadefNamespaceRepo):
      def get_super_class(self):
          return domain_proxy.MetadefNamespaceRepo
  
      def get_proxy_class(self):
          return MetadefNamespaceProxy
  
      def get_payload(self, obj):
          return format_metadef_namespace_notification(obj)
  
      def save(self, metadef_namespace):
          name = getattr(metadef_namespace, '_old_namespace',
                         metadef_namespace.namespace)
          result = super(MetadefNamespaceRepoProxy, self).save(metadef_namespace)
          self.send_notification(
              'metadef_namespace.update', metadef_namespace,
              extra_payload={
                  'namespace_old': name,
              })
          return result
  
      def add(self, metadef_namespace):
          result = super(MetadefNamespaceRepoProxy, self).add(metadef_namespace)
          self.send_notification('metadef_namespace.create', metadef_namespace)
          return result
  
      def remove(self, metadef_namespace):
          result = super(MetadefNamespaceRepoProxy, self).remove(
              metadef_namespace)
          self.send_notification(
              'metadef_namespace.delete', metadef_namespace,
              extra_payload={'deleted': True, 'deleted_at': timeutils.isotime()}
          )
          return result
  
      def remove_objects(self, metadef_namespace):
          result = super(MetadefNamespaceRepoProxy, self).remove_objects(
              metadef_namespace)
          self.send_notification('metadef_namespace.delete_objects',
                                 metadef_namespace)
          return result
  
      def remove_properties(self, metadef_namespace):
          result = super(MetadefNamespaceRepoProxy, self).remove_properties(
              metadef_namespace)
          self.send_notification('metadef_namespace.delete_properties',
                                 metadef_namespace)
          return result
  
      def remove_tags(self, metadef_namespace):
          result = super(MetadefNamespaceRepoProxy, self).remove_tags(
              metadef_namespace)
          self.send_notification('metadef_namespace.delete_tags',
                                 metadef_namespace)
          return result
  
  
  class MetadefObjectProxy(NotificationProxy, domain_proxy.MetadefObject):
      def get_super_class(self):
          return domain_proxy.MetadefObject
  
  
  class MetadefObjectFactoryProxy(NotificationFactoryProxy,
                                  domain_proxy.MetadefObjectFactory):
      def get_super_class(self):
          return domain_proxy.MetadefObjectFactory
  
      def get_proxy_class(self):
          return MetadefObjectProxy
  
  
  class MetadefObjectRepoProxy(NotificationRepoProxy,
                               domain_proxy.MetadefObjectRepo):
      def get_super_class(self):
          return domain_proxy.MetadefObjectRepo
  
      def get_proxy_class(self):
          return MetadefObjectProxy
  
      def get_payload(self, obj):
          return format_metadef_object_notification(obj)
  
      def save(self, metadef_object):
          name = getattr(metadef_object, '_old_name', metadef_object.name)
          result = super(MetadefObjectRepoProxy, self).save(metadef_object)
          self.send_notification(
              'metadef_object.update', metadef_object,
              extra_payload={
                  'namespace': metadef_object.namespace.namespace,
                  'name_old': name,
              })
          return result
  
      def add(self, metadef_object):
          result = super(MetadefObjectRepoProxy, self).add(metadef_object)
          self.send_notification('metadef_object.create', metadef_object)
          return result
  
      def remove(self, metadef_object):
          result = super(MetadefObjectRepoProxy, self).remove(metadef_object)
          self.send_notification(
              'metadef_object.delete', metadef_object,
              extra_payload={
                  'deleted': True,
                  'deleted_at': timeutils.isotime(),
                  'namespace': metadef_object.namespace.namespace
              }
          )
          return result
  
  
  class MetadefPropertyProxy(NotificationProxy, domain_proxy.MetadefProperty):
      def get_super_class(self):
          return domain_proxy.MetadefProperty
  
  
  class MetadefPropertyFactoryProxy(NotificationFactoryProxy,
                                    domain_proxy.MetadefPropertyFactory):
      def get_super_class(self):
          return domain_proxy.MetadefPropertyFactory
  
      def get_proxy_class(self):
          return MetadefPropertyProxy
  
  
  class MetadefPropertyRepoProxy(NotificationRepoProxy,
                                 domain_proxy.MetadefPropertyRepo):
      def get_super_class(self):
          return domain_proxy.MetadefPropertyRepo
  
      def get_proxy_class(self):
          return MetadefPropertyProxy
  
      def get_payload(self, obj):
          return format_metadef_property_notification(obj)
  
      def save(self, metadef_property):
          name = getattr(metadef_property, '_old_name', metadef_property.name)
          result = super(MetadefPropertyRepoProxy, self).save(metadef_property)
          self.send_notification(
              'metadef_property.update', metadef_property,
              extra_payload={
                  'namespace': metadef_property.namespace.namespace,
                  'name_old': name,
              })
          return result
  
      def add(self, metadef_property):
          result = super(MetadefPropertyRepoProxy, self).add(metadef_property)
          self.send_notification('metadef_property.create', metadef_property)
          return result
  
      def remove(self, metadef_property):
          result = super(MetadefPropertyRepoProxy, self).remove(metadef_property)
          self.send_notification(
              'metadef_property.delete', metadef_property,
              extra_payload={
                  'deleted': True,
                  'deleted_at': timeutils.isotime(),
                  'namespace': metadef_property.namespace.namespace
              }
          )
          return result
  
  
  class MetadefResourceTypeProxy(NotificationProxy,
                                 domain_proxy.MetadefResourceType):
      def get_super_class(self):
          return domain_proxy.MetadefResourceType
  
  
  class MetadefResourceTypeFactoryProxy(NotificationFactoryProxy,
                                        domain_proxy.MetadefResourceTypeFactory):
      def get_super_class(self):
          return domain_proxy.MetadefResourceTypeFactory
  
      def get_proxy_class(self):
          return MetadefResourceTypeProxy
  
  
  class MetadefResourceTypeRepoProxy(NotificationRepoProxy,
                                     domain_proxy.MetadefResourceTypeRepo):
      def get_super_class(self):
          return domain_proxy.MetadefResourceTypeRepo
  
      def get_proxy_class(self):
          return MetadefResourceTypeProxy
  
      def get_payload(self, obj):
          return format_metadef_resource_type_notification(obj)
  
      def add(self, md_resource_type):
          result = super(MetadefResourceTypeRepoProxy, self).add(
              md_resource_type)
          self.send_notification('metadef_resource_type.create',
                                 md_resource_type)
          return result
  
      def remove(self, md_resource_type):
          result = super(MetadefResourceTypeRepoProxy, self).remove(
              md_resource_type)
          self.send_notification(
              'metadef_resource_type.delete', md_resource_type,
              extra_payload={
                  'deleted': True,
                  'deleted_at': timeutils.isotime(),
                  'namespace': md_resource_type.namespace.namespace
              }
          )
          return result
  
  
  class MetadefTagProxy(NotificationProxy, domain_proxy.MetadefTag):
      def get_super_class(self):
          return domain_proxy.MetadefTag
  
  
  class MetadefTagFactoryProxy(NotificationFactoryProxy,
                               domain_proxy.MetadefTagFactory):
      def get_super_class(self):
          return domain_proxy.MetadefTagFactory
  
      def get_proxy_class(self):
          return MetadefTagProxy
  
  
  class MetadefTagRepoProxy(NotificationRepoProxy, domain_proxy.MetadefTagRepo):
      def get_super_class(self):
          return domain_proxy.MetadefTagRepo
  
      def get_proxy_class(self):
          return MetadefTagProxy
  
      def get_payload(self, obj):
          return format_metadef_tag_notification(obj)
  
      def save(self, metadef_tag):
          name = getattr(metadef_tag, '_old_name', metadef_tag.name)
          result = super(MetadefTagRepoProxy, self).save(metadef_tag)
          self.send_notification(
              'metadef_tag.update', metadef_tag,
              extra_payload={
                  'namespace': metadef_tag.namespace.namespace,
                  'name_old': name,
              })
          return result
  
      def add(self, metadef_tag):
          result = super(MetadefTagRepoProxy, self).add(metadef_tag)
          self.send_notification('metadef_tag.create', metadef_tag)
          return result
  
      def add_tags(self, metadef_tags):
          result = super(MetadefTagRepoProxy, self).add_tags(metadef_tags)
          for metadef_tag in metadef_tags:
              self.send_notification('metadef_tag.create', metadef_tag)
  
          return result
  
      def remove(self, metadef_tag):
          result = super(MetadefTagRepoProxy, self).remove(metadef_tag)
          self.send_notification(
              'metadef_tag.delete', metadef_tag,
              extra_payload={
                  'deleted': True,
                  'deleted_at': timeutils.isotime(),
                  'namespace': metadef_tag.namespace.namespace
              }
          )
          return result
  