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OpenStack Study: types_manage.py

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# Copyright (c) 2011 Zadara Storage Inc.

# Copyright (c) 2011 OpenStack Foundation

#

# 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.

"""The volume types manage extension."""

import six

import webob

from cinder.api import extensions

from cinder.api.openstack import wsgi

from cinder.api.v1 import types

from cinder.api.views import types as views_types

from cinder import exception

from cinder import rpc

from cinder.volume import volume_types

authorize = extensions.extension_authorizer('volume', 'types_manage')

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class VolumeTypesManageController(wsgi.Controller):

"""The volume types API controller for the OpenStack API."""

_view_builder_class = views_types.ViewBuilder

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    def _notify_volume_type_error(self, context, method, payload):

        rpc.get_notifier('volumeType').error(context, method, payload)

    @wsgi.action("create")

    @wsgi.serializers(xml=types.VolumeTypeTemplate)

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    def _create(self, req, body):

        """Creates a new volume type."""

        context = req.environ['cinder.context']

        authorize(context)

        if not self.is_valid_body(body, 'volume_type'):

            raise webob.exc.HTTPBadRequest()

        vol_type = body['volume_type']

        name = vol_type.get('name', None)

        specs = vol_type.get('extra_specs', {})

        if name is None or name == "":

            raise webob.exc.HTTPBadRequest()

        try:

            volume_types.create(context, name, specs)

            vol_type = volume_types.get_volume_type_by_name(context, name)

            notifier_info = dict(volume_types=vol_type)

            rpc.get_notifier('volumeType').info(context, 'volume_type.create',

                                                notifier_info)

        except exception.VolumeTypeExists as err:

            notifier_err = dict(volume_types=vol_type, error_message=err)

            self._notify_volume_type_error(context,

                                           'volume_type.create',

                                           notifier_err)

            raise webob.exc.HTTPConflict(explanation=six.text_type(err))

        except exception.NotFound as err:

            notifier_err = dict(volume_types=vol_type, error_message=err)

            self._notify_volume_type_error(context,

                                           'volume_type.create',

                                           notifier_err)

            raise webob.exc.HTTPNotFound()

        return self._view_builder.show(req, vol_type)

    @wsgi.action("delete")

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    def _delete(self, req, id):

        """Deletes an existing volume type."""

        context = req.environ['cinder.context']

        authorize(context)

        try:

            vol_type = volume_types.get_volume_type(context, id)

            volume_types.destroy(context, vol_type['id'])

            notifier_info = dict(volume_types=vol_type)

            rpc.get_notifier('volumeType').info(context,

                                                'volume_type.delete',

                                                notifier_info)

        except exception.VolumeTypeInUse as err:

            notifier_err = dict(id=id, error_message=err)

            self._notify_volume_type_error(context,

                                           'volume_type.delete',

                                           notifier_err)

            msg = _('Target volume type is still in use.')

            raise webob.exc.HTTPBadRequest(explanation=msg)

        except exception.NotFound as err:

            notifier_err = dict(id=id, error_message=err)

            self._notify_volume_type_error(context,

                                           'volume_type.delete',

                                           notifier_err)

            raise webob.exc.HTTPNotFound()

        return webob.Response(status_int=202)

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class Types_manage(extensions.ExtensionDescriptor):

"""Types manage support."""

name = "TypesManage"

alias = "os-types-manage"

namespace = "http://docs.openstack.org/volume/ext/types-manage/api/v1"

updated = "2011-08-24T00:00:00+00:00"

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    def get_controller_extensions(self):

        controller = VolumeTypesManageController()

        extension = extensions.ControllerExtension(self, 'types', controller)

        return [extension]