184 lines
7.1 KiB
Python
184 lines
7.1 KiB
Python
# Copyright 2013 Red Hat, Inc
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#
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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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from nova import db
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from nova import exception
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from nova.objects import base
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from nova.objects import fields
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OPTIONAL_FIELDS = ['extra_specs', 'projects']
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class Flavor(base.NovaPersistentObject, base.NovaObject):
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VERSION = '1.0'
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fields = {
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'id': fields.IntegerField(),
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'name': fields.StringField(nullable=True),
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'memory_mb': fields.IntegerField(),
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'vcpus': fields.IntegerField(),
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'root_gb': fields.IntegerField(),
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'ephemeral_gb': fields.IntegerField(),
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'flavorid': fields.StringField(),
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'swap': fields.IntegerField(),
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'rxtx_factor': fields.FloatField(nullable=True, default=1.0),
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'vcpu_weight': fields.IntegerField(nullable=True),
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'disabled': fields.BooleanField(),
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'is_public': fields.BooleanField(),
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'extra_specs': fields.DictOfStringsField(),
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'projects': fields.ListOfStringsField(),
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}
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@staticmethod
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def _from_db_object(context, flavor, db_flavor, expected_attrs=None):
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if expected_attrs is None:
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expected_attrs = []
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for name, field in flavor.fields.items():
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if name in OPTIONAL_FIELDS:
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continue
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value = db_flavor[name]
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if isinstance(field, fields.IntegerField):
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value = value if value is not None else 0
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flavor[name] = value
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if 'extra_specs' in expected_attrs:
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flavor.extra_specs = db_flavor['extra_specs']
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if 'projects' in expected_attrs:
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flavor._load_projects(context)
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flavor._context = context
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flavor.obj_reset_changes()
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return flavor
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@base.remotable
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def _load_projects(self, context):
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self.projects = [x['project_id'] for x in
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db.flavor_access_get_by_flavor_id(context,
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self.flavorid)]
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self.obj_reset_changes('projects')
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def obj_load_attr(self, attrname):
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# NOTE(danms): Only projects could be lazy-loaded right now
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if attrname != 'projects':
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raise exception.ObjectActionError(
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action='obj_load_attr', reason='unable to load %s' % attrname)
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self._load_projects()
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@base.remotable_classmethod
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def get_by_id(cls, context, id):
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db_flavor = db.flavor_get(context, id)
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return cls._from_db_object(context, cls(), db_flavor,
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expected_attrs=['extra_specs'])
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@base.remotable_classmethod
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def get_by_name(cls, context, name):
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db_flavor = db.flavor_get_by_name(context, name)
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return cls._from_db_object(context, cls(), db_flavor,
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expected_attrs=['extra_specs'])
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@base.remotable_classmethod
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def get_by_flavor_id(cls, context, flavor_id, read_deleted=None):
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db_flavor = db.flavor_get_by_flavor_id(context, flavor_id,
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read_deleted)
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return cls._from_db_object(context, cls(), db_flavor,
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expected_attrs=['extra_specs'])
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@base.remotable
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def add_access(self, context, project_id):
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if 'projects' in self.obj_what_changed():
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raise exception.ObjectActionError(action='add_access',
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reason='projects modified')
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db.flavor_access_add(context, self.flavorid, project_id)
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self._load_projects(context)
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@base.remotable
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def remove_access(self, context, project_id):
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if 'projects' in self.obj_what_changed():
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raise exception.ObjectActionError(action='remove_access',
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reason='projects modified')
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db.flavor_access_remove(context, self.flavorid, project_id)
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self._load_projects(context)
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@base.remotable
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def create(self, context):
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if self.obj_attr_is_set('id'):
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raise exception.ObjectActionError(action='create',
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reason='already created')
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updates = self.obj_get_changes()
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expected_attrs = []
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for attr in OPTIONAL_FIELDS:
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if attr in updates:
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expected_attrs.append(attr)
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projects = updates.pop('projects', [])
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db_flavor = db.flavor_create(context, updates, projects=projects)
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self._from_db_object(context, self, db_flavor,
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expected_attrs=expected_attrs)
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@base.remotable
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def save(self, context):
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updates = self.obj_get_changes()
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projects = updates.pop('projects', None)
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extra_specs = updates.pop('extra_specs', None)
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if updates:
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raise exception.ObjectActionError(
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action='save', reason='read-only fields were changed')
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if extra_specs:
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db.flavor_extra_specs_update_or_create(context, self.flavorid,
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extra_specs)
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# NOTE(danms): This could be much simpler and more efficient
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# with a smarter flavor_access_update() method in db_api.
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if projects is not None:
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current_projects = [x['project_id']
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for x in db.flavor_access_get_by_flavor_id(
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context, self.flavorid)]
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for project_id in projects:
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if project_id not in current_projects:
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db.flavor_access_add(context, self.flavorid, project_id)
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else:
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current_projects.remove(project_id)
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for condemned_project_id in current_projects:
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db.flavor_access_remove(context, self.flavorid,
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condemned_project_id)
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self.obj_reset_changes()
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@base.remotable
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def destroy(self, context):
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db.flavor_destroy(context, self.name)
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class FlavorList(base.ObjectListBase, base.NovaObject):
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VERSION = '1.0'
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fields = {
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'objects': fields.ListOfObjectsField('Flavor'),
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}
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child_versions = {
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'1.0': '1.0',
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}
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@base.remotable_classmethod
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def get_all(cls, context, inactive=False, filters=None,
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sort_key='flavorid', sort_dir='asc', limit=None, marker=None):
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db_flavors = db.flavor_get_all(context, inactive=inactive,
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filters=filters, sort_key=sort_key,
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sort_dir=sort_dir, limit=limit,
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marker=marker)
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return base.obj_make_list(context, cls(), Flavor, db_flavors,
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expected_attrs=['extra_specs'])
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