예제 #1
0
class TerseAuditPayload(notificationbase.NotificationPayloadBase):
    SCHEMA = {
        'uuid': ('audit', 'uuid'),
        'audit_type': ('audit', 'audit_type'),
        'state': ('audit', 'state'),
        'parameters': ('audit', 'parameters'),
        'interval': ('audit', 'interval'),
        'scope': ('audit', 'scope'),
        'created_at': ('audit', 'created_at'),
        'updated_at': ('audit', 'updated_at'),
        'deleted_at': ('audit', 'deleted_at'),
    }

    # Version 1.0: Initial version
    VERSION = '1.0'

    fields = {
        'uuid': wfields.UUIDField(),
        'audit_type': wfields.StringField(),
        'state': wfields.StringField(),
        'parameters': wfields.FlexibleDictField(nullable=True),
        'interval': wfields.IntegerField(nullable=True),
        'scope': wfields.FlexibleListOfDictField(nullable=True),
        'goal_uuid': wfields.UUIDField(),
        'strategy_uuid': wfields.UUIDField(nullable=True),
        'created_at': wfields.DateTimeField(nullable=True),
        'updated_at': wfields.DateTimeField(nullable=True),
        'deleted_at': wfields.DateTimeField(nullable=True),
    }

    def __init__(self, audit, goal_uuid, strategy_uuid=None, **kwargs):
        super(TerseAuditPayload, self).__init__(goal_uuid=goal_uuid,
                                                strategy_uuid=strategy_uuid,
                                                **kwargs)
        self.populate_schema(audit=audit)
예제 #2
0
class StrategyPayload(notificationbase.NotificationPayloadBase):
    SCHEMA = {
        'uuid': ('strategy', 'uuid'),
        'name': ('strategy', 'name'),
        'display_name': ('strategy', 'display_name'),
        'parameters_spec': ('strategy', 'parameters_spec'),
        'created_at': ('strategy', 'created_at'),
        'updated_at': ('strategy', 'updated_at'),
        'deleted_at': ('strategy', 'deleted_at'),
    }

    # Version 1.0: Initial version
    VERSION = '1.0'

    fields = {
        'uuid': wfields.UUIDField(),
        'name': wfields.StringField(),
        'display_name': wfields.StringField(),
        'parameters_spec': wfields.FlexibleDictField(nullable=True),
        'created_at': wfields.DateTimeField(nullable=True),
        'updated_at': wfields.DateTimeField(nullable=True),
        'deleted_at': wfields.DateTimeField(nullable=True),
    }

    def __init__(self, strategy, **kwargs):
        super(StrategyPayload, self).__init__(**kwargs)
        self.populate_schema(strategy=strategy)
예제 #3
0
class TerseActionPlanPayload(notificationbase.NotificationPayloadBase):
    SCHEMA = {
        'uuid': ('action_plan', 'uuid'),
        'state': ('action_plan', 'state'),
        'global_efficacy': ('action_plan', 'global_efficacy'),
        'created_at': ('action_plan', 'created_at'),
        'updated_at': ('action_plan', 'updated_at'),
        'deleted_at': ('action_plan', 'deleted_at'),
    }

    # Version 1.0: Initial version
    VERSION = '1.0'

    fields = {
        'uuid': wfields.UUIDField(),
        'state': wfields.StringField(),
        'global_efficacy': wfields.FlexibleDictField(nullable=True),
        'audit_uuid': wfields.UUIDField(),
        'strategy_uuid': wfields.UUIDField(nullable=True),
        'created_at': wfields.DateTimeField(nullable=True),
        'updated_at': wfields.DateTimeField(nullable=True),
        'deleted_at': wfields.DateTimeField(nullable=True),
    }

    def __init__(self, action_plan, audit=None, strategy=None, **kwargs):
        super(TerseActionPlanPayload, self).__init__(audit=audit,
                                                     strategy=strategy,
                                                     **kwargs)
        self.populate_schema(action_plan=action_plan)
예제 #4
0
파일: audit.py 프로젝트: sjamgade/watcher
class TerseAuditPayload(notificationbase.NotificationPayloadBase):
    SCHEMA = {
        'uuid': ('audit', 'uuid'),
        'name': ('audit', 'name'),
        'audit_type': ('audit', 'audit_type'),
        'state': ('audit', 'state'),
        'parameters': ('audit', 'parameters'),
        'interval': ('audit', 'interval'),
        'scope': ('audit', 'scope'),
        'auto_trigger': ('audit', 'auto_trigger'),
        'next_run_time': ('audit', 'next_run_time'),
        'created_at': ('audit', 'created_at'),
        'updated_at': ('audit', 'updated_at'),
        'deleted_at': ('audit', 'deleted_at'),
    }

    # Version 1.0: Initial version
    # Version 1.1: Added 'auto_trigger' boolean field,
    #              Added 'next_run_time' DateTime field,
    #              'interval' type has been changed from Integer to String
    # Version 1.2: Added 'name' string field
    VERSION = '1.2'

    fields = {
        'uuid': wfields.UUIDField(),
        'name': wfields.StringField(),
        'audit_type': wfields.StringField(),
        'state': wfields.StringField(),
        'parameters': wfields.FlexibleDictField(nullable=True),
        'interval': wfields.StringField(nullable=True),
        'scope': wfields.FlexibleListOfDictField(nullable=True),
        'goal_uuid': wfields.UUIDField(),
        'strategy_uuid': wfields.UUIDField(nullable=True),
        'auto_trigger': wfields.BooleanField(),
        'next_run_time': wfields.DateTimeField(nullable=True),
        'created_at': wfields.DateTimeField(nullable=True),
        'updated_at': wfields.DateTimeField(nullable=True),
        'deleted_at': wfields.DateTimeField(nullable=True),
    }

    def __init__(self, audit, goal_uuid, strategy_uuid=None, **kwargs):
        super(TerseAuditPayload, self).__init__(goal_uuid=goal_uuid,
                                                strategy_uuid=strategy_uuid,
                                                **kwargs)
        self.populate_schema(audit=audit)
예제 #5
0
class Audit(base.WatcherPersistentObject, base.WatcherObject,
            base.WatcherObjectDictCompat):

    # Version 1.0: Initial version
    # Version 1.1: Added 'goal' and 'strategy' object field
    # Version 1.2  Added 'auto_trigger' boolean field
    VERSION = '1.2'

    dbapi = db_api.get_instance()

    fields = {
        'id': wfields.IntegerField(),
        'uuid': wfields.UUIDField(),
        'audit_type': wfields.StringField(),
        'state': wfields.StringField(),
        'parameters': wfields.FlexibleDictField(nullable=True),
        'interval': wfields.IntegerField(nullable=True),
        'scope': wfields.FlexibleListOfDictField(nullable=True),
        'goal_id': wfields.IntegerField(),
        'strategy_id': wfields.IntegerField(nullable=True),
        'auto_trigger': wfields.BooleanField(),

        'goal': wfields.ObjectField('Goal', nullable=True),
        'strategy': wfields.ObjectField('Strategy', nullable=True),
    }

    object_fields = {
        'goal': (objects.Goal, 'goal_id'),
        'strategy': (objects.Strategy, 'strategy_id'),
    }

    # Proxified field so we can keep the previous value after an update
    _state = None
    _old_state = None

    # NOTE(v-francoise): The way oslo.versionedobjects works is by using a
    # __new__ that will automatically create the attributes referenced in
    # fields. These attributes are properties that raise an exception if no
    # value has been assigned, which means that they store the actual field
    # value in an "_obj_%(field)s" attribute. So because we want to proxify a
    # value that is already proxified, we have to do what you see below.
    @property
    def _obj_state(self):
        return self._state

    @property
    def _obj_old_state(self):
        return self._old_state

    @property
    def old_state(self):
        return self._old_state

    @_obj_old_state.setter
    def _obj_old_state(self, value):
        self._old_state = value

    @_obj_state.setter
    def _obj_state(self, value):
        if self._old_state is None and self._state is None:
            self._state = value
        else:
            self._old_state, self._state = self._state, value

    @base.remotable_classmethod
    def get(cls, context, audit_id, eager=False):
        """Find a audit based on its id or uuid and return a Audit object.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Audit(context)
        :param audit_id: the id *or* uuid of a audit.
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`Audit` object.
        """
        if utils.is_int_like(audit_id):
            return cls.get_by_id(context, audit_id, eager=eager)
        elif utils.is_uuid_like(audit_id):
            return cls.get_by_uuid(context, audit_id, eager=eager)
        else:
            raise exception.InvalidIdentity(identity=audit_id)

    @base.remotable_classmethod
    def get_by_id(cls, context, audit_id, eager=False):
        """Find a audit based on its integer id and return a Audit object.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Audit(context)
        :param audit_id: the id of a audit.
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`Audit` object.
        """
        db_audit = cls.dbapi.get_audit_by_id(context, audit_id, eager=eager)
        audit = cls._from_db_object(cls(context), db_audit, eager=eager)
        return audit

    @base.remotable_classmethod
    def get_by_uuid(cls, context, uuid, eager=False):
        """Find a audit based on uuid and return a :class:`Audit` object.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Audit(context)
        :param uuid: the uuid of a audit.
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`Audit` object.
        """

        db_audit = cls.dbapi.get_audit_by_uuid(context, uuid, eager=eager)
        audit = cls._from_db_object(cls(context), db_audit, eager=eager)
        return audit

    @base.remotable_classmethod
    def list(cls, context, limit=None, marker=None, filters=None,
             sort_key=None, sort_dir=None, eager=False):
        """Return a list of Audit objects.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Audit(context)
        :param limit: maximum number of resources to return in a single result.
        :param marker: pagination marker for large data sets.
        :param filters: Filters to apply. Defaults to None.
        :param sort_key: column to sort results by.
        :param sort_dir: direction to sort. "asc" or "desc".
        :param eager: Load object fields if True (Default: False)
        :returns: a list of :class:`Audit` object.

        """
        db_audits = cls.dbapi.get_audit_list(context,
                                             limit=limit,
                                             marker=marker,
                                             filters=filters,
                                             sort_key=sort_key,
                                             sort_dir=sort_dir,
                                             eager=eager)
        return [cls._from_db_object(cls(context), obj, eager=eager)
                for obj in db_audits]

    @base.remotable
    def create(self):
        """Create an :class:`Audit` record in the DB.

        :returns: An :class:`Audit` object.
        """
        values = self.obj_get_changes()
        db_audit = self.dbapi.create_audit(values)
        # Note(v-francoise): Always load eagerly upon creation so we can send
        # notifications containing information about the related relationships
        self._from_db_object(self, db_audit, eager=True)

        def _notify():
            notifications.audit.send_create(self._context, self)

        _notify()

    @base.remotable
    def destroy(self):
        """Delete the Audit from the DB."""
        self.dbapi.destroy_audit(self.uuid)
        self.obj_reset_changes()

    @base.remotable
    def save(self):
        """Save updates to this Audit.

        Updates will be made column by column based on the result
        of self.what_changed().
        """
        updates = self.obj_get_changes()
        db_obj = self.dbapi.update_audit(self.uuid, updates)
        obj = self._from_db_object(
            self.__class__(self._context), db_obj, eager=False)
        self.obj_refresh(obj)

        def _notify():
            notifications.audit.send_update(
                self._context, self, old_state=self.old_state)

        _notify()

        self.obj_reset_changes()

    @base.remotable
    def refresh(self, eager=False):
        """Loads updates for this Audit.

        Loads a audit with the same uuid from the database and
        checks for updated attributes. Updates are applied from
        the loaded audit column by column, if there are any updates.
        :param eager: Load object fields if True (Default: False)
        """
        current = self.get_by_uuid(self._context, uuid=self.uuid, eager=eager)
        self.obj_refresh(current)

    @base.remotable
    def soft_delete(self):
        """Soft Delete the Audit from the DB."""
        self.state = State.DELETED
        self.save()
        db_obj = self.dbapi.soft_delete_audit(self.uuid)
        obj = self._from_db_object(
            self.__class__(self._context), db_obj, eager=False)
        self.obj_refresh(obj)

        def _notify():
            notifications.audit.send_delete(self._context, self)

        _notify()
예제 #6
0
class ActionPlan(base.WatcherPersistentObject, base.WatcherObject,
                 base.WatcherObjectDictCompat):

    # Version 1.0: Initial version
    # Version 1.1: Added 'audit' and 'strategy' object field
    # Version 1.2: audit_id is not nullable anymore
    # Version 2.0: Removed 'first_action_id' object field
    VERSION = '2.0'

    dbapi = db_api.get_instance()

    fields = {
        'id': wfields.IntegerField(),
        'uuid': wfields.UUIDField(),
        'audit_id': wfields.IntegerField(),
        'strategy_id': wfields.IntegerField(),
        'state': wfields.StringField(nullable=True),
        'global_efficacy': wfields.FlexibleDictField(nullable=True),
        'audit': wfields.ObjectField('Audit', nullable=True),
        'strategy': wfields.ObjectField('Strategy', nullable=True),
    }

    object_fields = {
        'audit': (objects.Audit, 'audit_id'),
        'strategy': (objects.Strategy, 'strategy_id'),
    }

    # Proxified field so we can keep the previous value after an update
    _state = None
    _old_state = None

    # NOTE(v-francoise): The way oslo.versionedobjects works is by using a
    # __new__ that will automatically create the attributes referenced in
    # fields. These attributes are properties that raise an exception if no
    # value has been assigned, which means that they store the actual field
    # value in an "_obj_%(field)s" attribute. So because we want to proxify a
    # value that is already proxified, we have to do what you see below.
    @property
    def _obj_state(self):
        return self._state

    @property
    def _obj_old_state(self):
        return self._old_state

    @property
    def old_state(self):
        return self._old_state

    @_obj_old_state.setter
    def _obj_old_state(self, value):
        self._old_state = value

    @_obj_state.setter
    def _obj_state(self, value):
        if self._old_state is None and self._state is None:
            self._state = value
        else:
            self._old_state, self._state = self._state, value

    @base.remotable_classmethod
    def get(cls, context, action_plan_id, eager=False):
        """Find a action_plan based on its id or uuid and return a Action object.

        :param action_plan_id: the id *or* uuid of a action_plan.
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`Action` object.
        """
        if utils.is_int_like(action_plan_id):
            return cls.get_by_id(context, action_plan_id, eager=eager)
        elif utils.is_uuid_like(action_plan_id):
            return cls.get_by_uuid(context, action_plan_id, eager=eager)
        else:
            raise exception.InvalidIdentity(identity=action_plan_id)

    @base.remotable_classmethod
    def get_by_id(cls, context, action_plan_id, eager=False):
        """Find a action_plan based on its integer id and return a ActionPlan object.

        :param action_plan_id: the id of a action_plan.
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`ActionPlan` object.
        """
        db_action_plan = cls.dbapi.get_action_plan_by_id(context,
                                                         action_plan_id,
                                                         eager=eager)
        action_plan = cls._from_db_object(cls(context),
                                          db_action_plan,
                                          eager=eager)
        return action_plan

    @base.remotable_classmethod
    def get_by_uuid(cls, context, uuid, eager=False):
        """Find a action_plan based on uuid and return a :class:`ActionPlan` object.

        :param uuid: the uuid of a action_plan.
        :param context: Security context
        :param eager: Load object fields if True (Default: False)
        :returns: a :class:`ActionPlan` object.
        """
        db_action_plan = cls.dbapi.get_action_plan_by_uuid(context,
                                                           uuid,
                                                           eager=eager)
        action_plan = cls._from_db_object(cls(context),
                                          db_action_plan,
                                          eager=eager)
        return action_plan

    @base.remotable_classmethod
    def list(cls,
             context,
             limit=None,
             marker=None,
             filters=None,
             sort_key=None,
             sort_dir=None,
             eager=False):
        """Return a list of ActionPlan objects.

        :param context: Security context.
        :param limit: maximum number of resources to return in a single result.
        :param marker: pagination marker for large data sets.
        :param filters: Filters to apply. Defaults to None.
        :param sort_key: column to sort results by.
        :param sort_dir: direction to sort. "asc" or "desc".
        :param eager: Load object fields if True (Default: False)
        :returns: a list of :class:`ActionPlan` object.
        """
        db_action_plans = cls.dbapi.get_action_plan_list(context,
                                                         limit=limit,
                                                         marker=marker,
                                                         filters=filters,
                                                         sort_key=sort_key,
                                                         sort_dir=sort_dir,
                                                         eager=eager)

        return [
            cls._from_db_object(cls(context), obj, eager=eager)
            for obj in db_action_plans
        ]

    @base.remotable
    def create(self):
        """Create an :class:`ActionPlan` record in the DB.

        :returns: An :class:`ActionPlan` object.
        """
        values = self.obj_get_changes()
        db_action_plan = self.dbapi.create_action_plan(values)
        # Note(v-francoise): Always load eagerly upon creation so we can send
        # notifications containing information about the related relationships
        self._from_db_object(self, db_action_plan, eager=True)

        def _notify():
            notifications.action_plan.send_create(self._context, self)

        _notify()

    @base.remotable
    def destroy(self):
        """Delete the action plan from the DB"""
        related_efficacy_indicators = objects.EfficacyIndicator.list(
            context=self._context, filters={"action_plan_uuid": self.uuid})

        # Cascade soft_delete of related efficacy indicators
        for related_efficacy_indicator in related_efficacy_indicators:
            related_efficacy_indicator.destroy()

        self.dbapi.destroy_action_plan(self.uuid)
        self.obj_reset_changes()

    @base.remotable
    def save(self):
        """Save updates to this Action plan.

        Updates will be made column by column based on the result
        of self.what_changed().
        """
        updates = self.obj_get_changes()
        db_obj = self.dbapi.update_action_plan(self.uuid, updates)
        obj = self._from_db_object(self.__class__(self._context),
                                   db_obj,
                                   eager=False)
        self.obj_refresh(obj)

        def _notify():
            notifications.action_plan.send_update(self._context,
                                                  self,
                                                  old_state=self.old_state)

        _notify()

        self.obj_reset_changes()

    @base.remotable
    def refresh(self, eager=False):
        """Loads updates for this Action plan.

        Loads a action_plan with the same uuid from the database and
        checks for updated attributes. Updates are applied from
        the loaded action_plan column by column, if there are any updates.
        :param eager: Load object fields if True (Default: False)
        """
        current = self.get_by_uuid(self._context, uuid=self.uuid, eager=eager)
        self.obj_refresh(current)

    @base.remotable
    def soft_delete(self):
        """Soft Delete the Action plan from the DB"""
        related_actions = objects.Action.list(
            context=self._context, filters={"action_plan_uuid": self.uuid})

        # Cascade soft_delete of related actions
        for related_action in related_actions:
            related_action.soft_delete()

        related_efficacy_indicators = objects.EfficacyIndicator.list(
            context=self._context, filters={"action_plan_uuid": self.uuid})

        # Cascade soft_delete of related efficacy indicators
        for related_efficacy_indicator in related_efficacy_indicators:
            related_efficacy_indicator.soft_delete()

        self.state = State.DELETED
        self.save()
        db_obj = self.dbapi.soft_delete_action_plan(self.uuid)
        obj = self._from_db_object(self.__class__(self._context),
                                   db_obj,
                                   eager=False)
        self.obj_refresh(obj)

        def _notify():
            notifications.action_plan.send_delete(self._context, self)

        _notify()
예제 #7
0
class Strategy(base.WatcherPersistentObject, base.WatcherObject,
               base.WatcherObjectDictCompat):

    # Version 1.0: Initial version
    # Version 1.1: Added Goal object field
    VERSION = '1.1'

    dbapi = db_api.get_instance()

    fields = {
        'id': wfields.IntegerField(),
        'uuid': wfields.UUIDField(),
        'name': wfields.StringField(),
        'display_name': wfields.StringField(),
        'goal_id': wfields.IntegerField(),
        'parameters_spec': wfields.FlexibleDictField(nullable=True),
        'goal': wfields.ObjectField('Goal', nullable=True),
    }

    object_fields = {'goal': (objects.Goal, 'goal_id')}

    @base.remotable_classmethod
    def get(cls, context, strategy_id, eager=False):
        """Find a strategy based on its id or uuid

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :param strategy_id: the id *or* uuid of a strategy.
        :param eager: Load object fields if True (Default: False)
        :returns: A :class:`Strategy` object.
        """
        if utils.is_int_like(strategy_id):
            return cls.get_by_id(context, strategy_id, eager=eager)
        elif utils.is_uuid_like(strategy_id):
            return cls.get_by_uuid(context, strategy_id, eager=eager)
        else:
            raise exception.InvalidIdentity(identity=strategy_id)

    @base.remotable_classmethod
    def get_by_id(cls, context, strategy_id, eager=False):
        """Find a strategy based on its integer id

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :param strategy_id: the id of a strategy.
        :param eager: Load object fields if True (Default: False)
        :returns: A :class:`Strategy` object.
        """
        db_strategy = cls.dbapi.get_strategy_by_id(context,
                                                   strategy_id,
                                                   eager=eager)
        strategy = cls._from_db_object(cls(context), db_strategy, eager=eager)
        return strategy

    @base.remotable_classmethod
    def get_by_uuid(cls, context, uuid, eager=False):
        """Find a strategy based on uuid

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :param uuid: the uuid of a strategy.
        :param eager: Load object fields if True (Default: False)
        :returns: A :class:`Strategy` object.
        """

        db_strategy = cls.dbapi.get_strategy_by_uuid(context,
                                                     uuid,
                                                     eager=eager)
        strategy = cls._from_db_object(cls(context), db_strategy, eager=eager)
        return strategy

    @base.remotable_classmethod
    def get_by_name(cls, context, name, eager=False):
        """Find a strategy based on name

        :param context: Security context
        :param name: the name of a strategy.
        :param eager: Load object fields if True (Default: False)
        :returns: A :class:`Strategy` object.
        """

        db_strategy = cls.dbapi.get_strategy_by_name(context,
                                                     name,
                                                     eager=eager)
        strategy = cls._from_db_object(cls(context), db_strategy, eager=eager)
        return strategy

    @base.remotable_classmethod
    def list(cls,
             context,
             limit=None,
             marker=None,
             filters=None,
             sort_key=None,
             sort_dir=None,
             eager=False):
        """Return a list of :class:`Strategy` objects.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :param limit: maximum number of resources to return in a single result.
        :param marker: pagination marker for large data sets.
        :param filters: dict mapping the filter key to a value.
        :param sort_key: column to sort results by.
        :param sort_dir: direction to sort. "asc" or "desc`".
        :param eager: Load object fields if True (Default: False)
        :returns: a list of :class:`Strategy` object.
        """
        db_strategies = cls.dbapi.get_strategy_list(context,
                                                    filters=filters,
                                                    limit=limit,
                                                    marker=marker,
                                                    sort_key=sort_key,
                                                    sort_dir=sort_dir)

        return [
            cls._from_db_object(cls(context), obj, eager=eager)
            for obj in db_strategies
        ]

    @base.remotable
    def create(self, context=None):
        """Create a :class:`Strategy` record in the DB.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :returns: A :class:`Strategy` object.
        """

        values = self.obj_get_changes()
        db_strategy = self.dbapi.create_strategy(values)
        # Note(v-francoise): Always load eagerly upon creation so we can send
        # notifications containing information about the related relationships
        self._from_db_object(self, db_strategy, eager=True)

    def destroy(self, context=None):
        """Delete the :class:`Strategy` from the DB.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        """
        self.dbapi.destroy_strategy(self.id)
        self.obj_reset_changes()

    @base.remotable
    def save(self, context=None):
        """Save updates to this :class:`Strategy`.

        Updates will be made column by column based on the result
        of self.what_changed().

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        """
        updates = self.obj_get_changes()
        self.dbapi.update_strategy(self.id, updates)

        self.obj_reset_changes()

    @base.remotable
    def refresh(self, context=None, eager=False):
        """Loads updates for this :class:`Strategy`.

        Loads a strategy with the same uuid from the database and
        checks for updated attributes. Updates are applied from
        the loaded strategy column by column, if there are any updates.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        :param eager: Load object fields if True (Default: False)
        """
        current = self.__class__.get_by_id(self._context,
                                           strategy_id=self.id,
                                           eager=eager)
        for field in self.fields:
            if (hasattr(self, base.get_attrname(field))
                    and self[field] != current[field]):
                self[field] = current[field]

    @base.remotable
    def soft_delete(self, context=None):
        """Soft Delete the :class:`Strategy` from the DB.

        :param context: Security context. NOTE: This should only
                        be used internally by the indirection_api.
                        Unfortunately, RPC requires context as the first
                        argument, even though we don't use it.
                        A context should be set when instantiating the
                        object, e.g.: Strategy(context)
        """
        self.dbapi.soft_delete_strategy(self.id)