# octavia.api.v2.controllers.flavors

# Source code for octavia.api.v2.controllers.flavors

    #    Copyright 2014 Rackspace
    #    Copyright 2016 Blue Box, an IBM Company
    #
    #    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.

    from oslo_db import api as oslo_db_api
    from oslo_db import exception as odb_exceptions
    from oslo_log import log as logging
    from oslo_utils import excutils
    from oslo_utils import uuidutils
    from pecan import request as pecan_request
    from sqlalchemy.orm import exc as sa_exception
    from wsme import types as wtypes
    from wsmeext import pecan as wsme_pecan

    from octavia.api.v2.controllers import base
    from octavia.api.v2.types import flavors as flavor_types
    from octavia.common import constants
    from octavia.common import exceptions
    from octavia.db import api as db_api

    LOG = logging.getLogger(__name__)

    class FlavorsController(base.BaseController):
        RBAC_TYPE = constants.RBAC_FLAVOR

        def __init__(self):
            super().__init__()

        @wsme_pecan.wsexpose(flavor_types.FlavorRootResponse, wtypes.text,
                             [wtypes.text], ignore_extra_args=True)
        def get_one(self, id, fields=None):
            """Gets a flavor's detail."""
            context = pecan_request.context.get('octavia_context')
            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_GET_ONE)
            if id == constants.NIL_UUID:
                raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
            with context.session.begin():
                db_flavor = self._get_db_flavor(context.session, id)
            result = self._convert_db_to_type(db_flavor,
                                              flavor_types.FlavorResponse)
            if fields is not None:
                result = self._filter_fields([result], fields)[0]
            return flavor_types.FlavorRootResponse(flavor=result)

        @wsme_pecan.wsexpose(flavor_types.FlavorsRootResponse,
                             [wtypes.text], ignore_extra_args=True)
        def get_all(self, fields=None):
            """Lists all flavors."""
            pcontext = pecan_request.context
            context = pcontext.get('octavia_context')
            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_GET_ALL)
            with context.session.begin():
                db_flavors, links = self.repositories.flavor.get_all(
                    context.session,
                    pagination_helper=pcontext.get(constants.PAGINATION_HELPER))
            result = self._convert_db_to_type(
                db_flavors, [flavor_types.FlavorResponse])
            if fields is not None:
                result = self._filter_fields(result, fields)
            return flavor_types.FlavorsRootResponse(
                flavors=result, flavors_links=links)

        @wsme_pecan.wsexpose(flavor_types.FlavorRootResponse,
                             body=flavor_types.FlavorRootPOST, status_code=201)
        def post(self, flavor_):
            """Creates a flavor."""
            flavor = flavor_.flavor
            context = pecan_request.context.get('octavia_context')
            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_POST)

            # TODO(johnsom) Validate the flavor profile ID

            context.session.begin()
            try:
                flavor_dict = flavor.to_dict(render_unsets=True)
                flavor_dict['id'] = uuidutils.generate_uuid()
                db_flavor = self.repositories.flavor.create(context.session,
                                                            **flavor_dict)
                context.session.commit()
            except odb_exceptions.DBDuplicateEntry as e:
                context.session.rollback()
                raise exceptions.RecordAlreadyExists(field='flavor',
                                                     name=flavor.name) from e
            except Exception:
                with excutils.save_and_reraise_exception():
                    context.session.rollback()
            result = self._convert_db_to_type(db_flavor,
                                              flavor_types.FlavorResponse)
            return flavor_types.FlavorRootResponse(flavor=result)

        @wsme_pecan.wsexpose(flavor_types.FlavorRootResponse,
                             wtypes.text, status_code=200,
                             body=flavor_types.FlavorRootPUT)
        def put(self, id, flavor_):
            flavor = flavor_.flavor
            context = pecan_request.context.get('octavia_context')
            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_PUT)
            if id == constants.NIL_UUID:
                raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
            context.session.begin()
            try:
                flavor_dict = flavor.to_dict(render_unsets=False)
                if flavor_dict:
                    self.repositories.flavor.update(context.session, id,
                                                    **flavor_dict)
                context.session.commit()
            except Exception:
                with excutils.save_and_reraise_exception():
                    context.session.rollback()

            # Force SQL alchemy to query the DB, otherwise we get inconsistent
            # results
            context.session.expire_all()
            with context.session.begin():
                db_flavor = self._get_db_flavor(context.session, id)
            result = self._convert_db_to_type(db_flavor,
                                              flavor_types.FlavorResponse)
            return flavor_types.FlavorRootResponse(flavor=result)

        @oslo_db_api.wrap_db_retry(max_retries=5, retry_on_deadlock=True)
        @wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
        def delete(self, flavor_id):
            """Deletes a Flavor"""
            context = pecan_request.context.get('octavia_context')

            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_DELETE)
            if flavor_id == constants.NIL_UUID:
                raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
            serial_session = db_api.get_session()
            serial_session.begin()
            serial_session.connection(
                execution_options={'isolation_level': 'SERIALIZABLE'})
            try:
                self.repositories.flavor.delete(serial_session, id=flavor_id)
                serial_session.commit()
            # Handle when load balancers still reference this flavor
            except odb_exceptions.DBReferenceError as e:
                serial_session.rollback()
                raise exceptions.ObjectInUse(object='Flavor', id=flavor_id) from e
            except sa_exception.NoResultFound as e:
                serial_session.rollback()
                raise exceptions.NotFound(resource='Flavor', id=flavor_id) from e
            except Exception as e:
                with excutils.save_and_reraise_exception():
                    LOG.error('Unknown flavor delete exception: %s', str(e))
                    serial_session.rollback()
            finally:
                serial_session.close()

this page last updated: 2026-04-02 20:14:22

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