160 lines
6.0 KiB
Python
160 lines
6.0 KiB
Python
# Copyright 2013 IBM Corp.
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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 availability_zones
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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 compute_node
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from nova.objects import fields
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from nova.openstack.common.gettextutils import _
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from nova.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class Service(base.NovaPersistentObject, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Added compute_node nested object
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# Version 1.2: String attributes updated to support unicode
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VERSION = '1.2'
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fields = {
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'id': fields.IntegerField(),
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'host': fields.StringField(nullable=True),
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'binary': fields.StringField(nullable=True),
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'topic': fields.StringField(nullable=True),
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'report_count': fields.IntegerField(),
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'disabled': fields.BooleanField(),
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'disabled_reason': fields.StringField(nullable=True),
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'availability_zone': fields.StringField(nullable=True),
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'compute_node': fields.ObjectField('ComputeNode'),
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}
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@staticmethod
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def _do_compute_node(context, service, db_service):
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try:
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# NOTE(danms): The service.compute_node relationship returns
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# a list, which should only have one item in it. If it's empty
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# or otherwise malformed, ignore it.
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db_compute = db_service['compute_node'][0]
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except Exception:
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return
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service.compute_node = compute_node.ComputeNode._from_db_object(
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context, compute_node.ComputeNode(), db_compute)
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@staticmethod
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def _from_db_object(context, service, db_service):
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allow_missing = ('availability_zone',)
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for key in service.fields:
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if key in allow_missing and key not in db_service:
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continue
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if key == 'compute_node':
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service._do_compute_node(context, service, db_service)
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else:
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service[key] = db_service[key]
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service._context = context
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service.obj_reset_changes()
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return service
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def obj_load_attr(self, attrname):
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if not self._context:
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raise exception.OrphanedObjectError(method='obj_load_attr',
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objtype=self.obj_name())
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LOG.debug(_("Lazy-loading `%(attr)s' on %(name)s id %(id)s"),
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{'attr': attrname,
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'name': self.obj_name(),
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'id': self.id,
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})
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if attrname != 'compute_node':
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raise exception.ObjectActionError(
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action='obj_load_attr',
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reason='attribute %s not lazy-loadable' % attrname)
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self.compute_node = compute_node.ComputeNode.get_by_service_id(
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self._context, self.id)
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@base.remotable_classmethod
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def get_by_id(cls, context, service_id):
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db_service = db.service_get(context, service_id)
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return cls._from_db_object(context, cls(), db_service)
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@base.remotable_classmethod
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def get_by_host_and_topic(cls, context, host, topic):
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db_service = db.service_get_by_host_and_topic(context, host, topic)
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return cls._from_db_object(context, cls(), db_service)
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@base.remotable_classmethod
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def get_by_compute_host(cls, context, host):
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db_service = db.service_get_by_compute_host(context, host)
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return cls._from_db_object(context, cls(), db_service)
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@base.remotable_classmethod
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def get_by_args(cls, context, host, binary):
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db_service = db.service_get_by_args(context, host, binary)
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return cls._from_db_object(context, cls(), db_service)
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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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updates.pop('id', None)
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db_service = db.service_create(context, updates)
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self._from_db_object(context, self, db_service)
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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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updates.pop('id', None)
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db_service = db.service_update(context, self.id, updates)
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self._from_db_object(context, self, db_service)
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@base.remotable
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def destroy(self, context):
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db.service_destroy(context, self.id)
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class ServiceList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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# Service <= version 1.2
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VERSION = '1.0'
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fields = {
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'objects': fields.ListOfObjectsField('Service'),
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}
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child_versions = {
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'1.0': '1.2',
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# NOTE(danms): Service was at 1.2 before we added this
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}
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@base.remotable_classmethod
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def get_by_topic(cls, context, topic):
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db_services = db.service_get_all_by_topic(context, topic)
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return base.obj_make_list(context, ServiceList(), Service, db_services)
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@base.remotable_classmethod
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def get_by_host(cls, context, host):
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db_services = db.service_get_all_by_host(context, host)
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return base.obj_make_list(context, ServiceList(), Service, db_services)
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@base.remotable_classmethod
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def get_all(cls, context, disabled=None, set_zones=False):
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db_services = db.service_get_all(context, disabled=disabled)
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if set_zones:
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db_services = availability_zones.set_availability_zones(
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context, db_services)
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return base.obj_make_list(context, ServiceList(), Service, db_services)
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