122 lines
4.8 KiB
Python
122 lines
4.8 KiB
Python
#
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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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#
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from neutron_lib.db import api as db_api
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from neutron_lib.db import model_query
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from neutron_lib.db import resource_extend
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from neutron_lib.objects import exceptions as obj_exc
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from neutron_lib.plugins import directory
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from oslo_log import helpers as log_helpers
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from sqlalchemy.orm import exc
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from neutron.db import common_db_mixin
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from neutron.db import standard_attr
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from neutron.extensions import tagging
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from neutron.objects import tag as tag_obj
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# Taggable resources
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resource_model_map = standard_attr.get_standard_attr_resource_model_map()
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@resource_extend.has_resource_extenders
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class TagPlugin(common_db_mixin.CommonDbMixin, tagging.TagPluginBase):
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"""Implementation of the Neutron Tag Service Plugin."""
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supported_extension_aliases = ['standard-attr-tag']
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__filter_validation_support = True
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def __new__(cls, *args, **kwargs):
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inst = super(TagPlugin, cls).__new__(cls, *args, **kwargs)
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tag_obj.register_tag_hooks()
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return inst
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@staticmethod
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@resource_extend.extends(list(resource_model_map))
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def _extend_tags_dict(response_data, db_data):
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if not directory.get_plugin(tagging.TAG_PLUGIN_TYPE):
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return
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tags = [tag_db.tag for tag_db in db_data.standard_attr.tags]
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response_data['tags'] = tags
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def _get_resource(self, context, resource, resource_id):
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model = resource_model_map[resource]
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try:
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return model_query.get_by_id(context, model, resource_id)
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except exc.NoResultFound:
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raise tagging.TagResourceNotFound(resource=resource,
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resource_id=resource_id)
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@log_helpers.log_method_call
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def get_tags(self, context, resource, resource_id):
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res = self._get_resource(context, resource, resource_id)
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tags = [tag_db.tag for tag_db in res.standard_attr.tags]
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return dict(tags=tags)
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@log_helpers.log_method_call
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def get_tag(self, context, resource, resource_id, tag):
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res = self._get_resource(context, resource, resource_id)
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if not any(tag == tag_db.tag for tag_db in res.standard_attr.tags):
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raise tagging.TagNotFound(tag=tag)
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@log_helpers.log_method_call
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@db_api.retry_if_session_inactive()
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def update_tags(self, context, resource, resource_id, body):
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with db_api.CONTEXT_WRITER.using(context):
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# We get and do all operations with objects in one session
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res = self._get_resource(context, resource, resource_id)
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new_tags = set(body['tags'])
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old_tags = {tag_db.tag for tag_db in res.standard_attr.tags}
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tags_added = new_tags - old_tags
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tags_removed = old_tags - new_tags
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if tags_removed:
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tag_obj.Tag.delete_objects(
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context,
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standard_attr_id=res.standard_attr_id,
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tag=[
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tag_db.tag
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for tag_db in res.standard_attr.tags
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if tag_db.tag in tags_removed
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]
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)
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for tag in tags_added:
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tag_obj.Tag(context, standard_attr_id=res.standard_attr_id,
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tag=tag).create()
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return body
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@log_helpers.log_method_call
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def update_tag(self, context, resource, resource_id, tag):
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res = self._get_resource(context, resource, resource_id)
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if any(tag == tag_db.tag for tag_db in res.standard_attr.tags):
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return
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try:
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tag_obj.Tag(context, standard_attr_id=res.standard_attr_id,
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tag=tag).create()
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except obj_exc.NeutronDbObjectDuplicateEntry:
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pass
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@log_helpers.log_method_call
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def delete_tags(self, context, resource, resource_id):
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res = self._get_resource(context, resource, resource_id)
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tag_obj.Tag.delete_objects(context,
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standard_attr_id=res.standard_attr_id)
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@log_helpers.log_method_call
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def delete_tag(self, context, resource, resource_id, tag):
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res = self._get_resource(context, resource, resource_id)
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if not tag_obj.Tag.delete_objects(
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context, tag=tag, standard_attr_id=res.standard_attr_id):
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raise tagging.TagNotFound(tag=tag)
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