161 lines
5.6 KiB
Python
161 lines
5.6 KiB
Python
# 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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"""Senlin common internal object model"""
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import re
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from oslo_utils import versionutils
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from oslo_versionedobjects import base
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from oslo_versionedobjects import fields as base_fields
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from senlin.common.i18n import _
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from senlin import objects
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VersionedObjectDictCompat = base.VersionedObjectDictCompat
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VersionedObjectSerializer = base.VersionedObjectSerializer
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class SenlinObject(base.VersionedObject):
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"""Base class for senlin objects.
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This is the base class for all objects that can be remoted or instantiated
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via RPC. Simply defining a sub-class of this class would make it remotely
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instantiatable. Objects should implement the "get" class method and the
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"save" object method.
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"""
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OBJ_SERIAL_NAMESPACE = 'senlin_object'
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OBJ_PROJECT_NAMESPACE = 'senlin'
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BASE_VERSION = '1.0'
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VERSION = '1.0'
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# list of version maps from api request version to object version
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# higher api versions after lower api versions. e.g.
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# {'1.2': '1.0', '1.4': '1.1'}
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VERSION_MAP = {}
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@staticmethod
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def _from_db_object(context, obj, db_obj):
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if db_obj is None:
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return None
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for field in obj.fields:
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if field == 'metadata':
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obj['metadata'] = db_obj['meta_data']
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else:
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obj[field] = db_obj[field]
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obj._context = context
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obj.obj_reset_changes()
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return obj
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@staticmethod
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def _transpose_metadata(values):
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"""Utility function to translate metadata field."""
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if 'metadata' in values:
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value = values.pop('metadata')
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values['meta_data'] = value
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return values
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@classmethod
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def to_json_schema(cls):
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obj_name = cls.obj_name()
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schema = {
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'$schema': 'http://json-schema.org/draft-04/schema#',
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'title': obj_name,
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}
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schema.update(base_fields.Object(obj_name).get_schema())
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dataf = cls.OBJ_SERIAL_NAMESPACE + ".data"
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schema["properties"][dataf]["additionalProperties"] = False
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return schema
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@classmethod
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def obj_class_from_name(cls, objname, objver=None):
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if objver is None:
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objver = cls.VERSION
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return super(SenlinObject, cls).obj_class_from_name(objname, objver)
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@classmethod
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def find_version(cls, context):
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match = re.match(r"^([1-9]\d*)\.([1-9]\d*|0)$", context.api_version)
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req_major = int(match.group(1))
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req_minor = int(match.group(2))
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# base version is '1.0'
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matched_version = cls.BASE_VERSION
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for api_ver in sorted(cls.VERSION_MAP.keys()):
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match = re.match(r"^([1-9]\d*)\.([1-9]\d*|0)$", api_ver)
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api_major = int(match.group(1))
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api_minor = int(match.group(2))
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if (api_major, api_minor) <= (req_major, req_minor):
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matched_version = cls.VERSION_MAP[api_ver]
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else:
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break
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return matched_version
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@classmethod
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def normalize_req(cls, name, req, key=None):
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result = {
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cls.OBJ_SERIAL_NAMESPACE + '.version': cls.VERSION,
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cls.OBJ_SERIAL_NAMESPACE + '.namespace': cls.OBJ_PROJECT_NAMESPACE,
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cls.OBJ_SERIAL_NAMESPACE + '.name': name,
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}
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if key is not None:
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if key not in req:
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raise ValueError(_("Request body missing '%s' key.") % key)
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result[cls.OBJ_SERIAL_NAMESPACE + '.data'] = {
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key: {
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cls.OBJ_SERIAL_NAMESPACE + '.version': cls.VERSION,
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cls.OBJ_SERIAL_NAMESPACE + '.namespace':
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cls.OBJ_PROJECT_NAMESPACE,
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cls.OBJ_SERIAL_NAMESPACE + '.name': name + 'Body',
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cls.OBJ_SERIAL_NAMESPACE + '.data': req[key]
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}
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}
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else:
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result[cls.OBJ_SERIAL_NAMESPACE + '.data'] = req
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return result
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class SenlinObjectRegistry(base.VersionedObjectRegistry):
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notification_classes = []
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def registration_hook(self, cls, index):
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"""Callback for object registration.
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When an object is registered, this function will be called for
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maintaining senlin.objects.$OBJECT as the highest-versioned
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implementation of a given object.
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"""
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version = versionutils.convert_version_to_tuple(cls.VERSION)
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if not hasattr(objects, cls.obj_name()):
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setattr(objects, cls.obj_name(), cls)
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else:
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curr_version = versionutils.convert_version_to_tuple(
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getattr(objects, cls.obj_name()).VERSION)
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if version >= curr_version:
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setattr(objects, cls.obj_name(), cls)
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@classmethod
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def register_notification(cls, notification_cls):
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"""Register a class as concrete notification.
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This is used only to register concrete notification or payload
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classes. Do NOT register base classes intended for inheritance only.
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"""
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cls.register_if(False)(notification_cls)
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cls.notification_classes.append(notification_cls)
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return notification_cls
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