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OpenStack Study: flavorextraspecs.py**** CubicPower OpenStack Study ****
# Copyright 2011 University of Southern California # All Rights Reserved. # # 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 instance type extra specs extension.""" from webob import exc from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova.api.openstack import xmlutil from nova.compute import flavors from nova import db from nova import exception from nova.openstack.common.gettextutils import _ authorize = extensions.extension_authorizer('compute', 'flavorextraspecs')
**** CubicPower OpenStack Study **** class ExtraSpecsTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): extra_specs_dict = xmlutil.make_flat_dict('extra_specs', colon_ns=True) return xmlutil.MasterTemplate(extra_specs_dict, 1)
**** CubicPower OpenStack Study **** class ExtraSpecTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): sel = xmlutil.Selector(xmlutil.get_items, 0) root = xmlutil.TemplateElement('extra_spec', selector=sel) root.set('key', 0) root.text = 1 return xmlutil.MasterTemplate(root, 1)
**** CubicPower OpenStack Study **** class FlavorExtraSpecsController(object): """The flavor extra specs API controller for the OpenStack API."""
**** CubicPower OpenStack Study **** def _get_extra_specs(self, context, flavor_id): extra_specs = db.flavor_extra_specs_get(context, flavor_id) return dict(extra_specs=extra_specs)
**** CubicPower OpenStack Study **** def _check_body(self, body): if body is None or body == "": expl = _('No Request Body') raise exc.HTTPBadRequest(explanation=expl)
**** CubicPower OpenStack Study **** def _check_key_names(self, keys): try: flavors.validate_extra_spec_keys(keys) except exception.InvalidInput as error: raise exc.HTTPBadRequest(explanation=error.format_message()) @wsgi.serializers(xml=ExtraSpecsTemplate)
**** CubicPower OpenStack Study **** def index(self, req, flavor_id): """Returns the list of extra specs for a given flavor.""" context = req.environ['nova.context'] authorize(context, action='index') return self._get_extra_specs(context, flavor_id) @wsgi.serializers(xml=ExtraSpecsTemplate)
**** CubicPower OpenStack Study **** def create(self, req, flavor_id, body): context = req.environ['nova.context'] authorize(context, action='create') self._check_body(body) specs = body.get('extra_specs') self._check_key_names(specs.keys()) try: db.flavor_extra_specs_update_or_create(context, flavor_id, specs) except exception.MetadataLimitExceeded as error: raise exc.HTTPBadRequest(explanation=error.format_message()) return body @wsgi.serializers(xml=ExtraSpecTemplate)
**** CubicPower OpenStack Study **** def update(self, req, flavor_id, id, body): context = req.environ['nova.context'] authorize(context, action='update') self._check_body(body) if id not in body: expl = _('Request body and URI mismatch') raise exc.HTTPBadRequest(explanation=expl) if len(body) > 1: expl = _('Request body contains too many items') raise exc.HTTPBadRequest(explanation=expl) try: db.flavor_extra_specs_update_or_create(context, flavor_id, body) except exception.MetadataLimitExceeded as error: raise exc.HTTPBadRequest(explanation=error.format_message()) return body @wsgi.serializers(xml=ExtraSpecTemplate)
**** CubicPower OpenStack Study **** def show(self, req, flavor_id, id): """Return a single extra spec item.""" context = req.environ['nova.context'] authorize(context, action='show') try: extra_spec = db.flavor_extra_specs_get_item(context, flavor_id, id) return extra_spec except exception.FlavorExtraSpecsNotFound: raise exc.HTTPNotFound()
**** CubicPower OpenStack Study **** def delete(self, req, flavor_id, id): """Deletes an existing extra spec.""" context = req.environ['nova.context'] authorize(context, action='delete') try: db.flavor_extra_specs_delete(context, flavor_id, id) except exception.FlavorExtraSpecsNotFound as e: raise exc.HTTPNotFound(explanation=e.format_message())
**** CubicPower OpenStack Study **** class Flavorextraspecs(extensions.ExtensionDescriptor): """Instance type (flavor) extra specs.""" name = "FlavorExtraSpecs" alias = "os-flavor-extra-specs" namespace = ("http://docs.openstack.org/compute/ext/" "flavor_extra_specs/api/v1.1") updated = "2011-06-23T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_resources(self): resources = [] res = extensions.ResourceExtension( 'os-extra_specs', FlavorExtraSpecsController(), parent=dict(member_name='flavor', collection_name='flavors')) resources.append(res) return resources
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