# -*- encoding: utf-8 -*-
# Copyright 2013 IBM Corp.
#
# 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.
"""
An :ref:`Action Plan <action_plan_definition>` is a flow of
:ref:`Actions <action_definition>` that should be executed in order to satisfy
a given :ref:`Goal <goal_definition>`.
An :ref:`Action Plan <action_plan_definition>` is generated by Watcher when an
:ref:`Audit <audit_definition>` is successful which implies that the
:ref:`Strategy <strategy_definition>`
which was used has found a :ref:`Solution <solution_definition>` to achieve the
:ref:`Goal <goal_definition>` of this :ref:`Audit <audit_definition>`.
In the default implementation of Watcher, an
:ref:`Action Plan <action_plan_definition>`
is only composed of successive :ref:`Actions <action_definition>`
(i.e., a Workflow of :ref:`Actions <action_definition>` belonging to a unique
branch).
However, Watcher provides abstract interfaces for many of its components,
allowing other implementations to generate and handle more complex
:ref:`Action Plan(s) <action_plan_definition>`
composed of two types of Action Item(s):
- simple :ref:`Actions <action_definition>`: atomic tasks, which means it
can not be split into smaller tasks or commands from an OpenStack point of
view.
- composite Actions: which are composed of several simple
:ref:`Actions <action_definition>`
ordered in sequential and/or parallel flows.
An :ref:`Action Plan <action_plan_definition>` may be described using
standard workflow model description formats such as
`Business Process Model and Notation 2.0 (BPMN 2.0)
<http://www.omg.org/spec/BPMN/2.0/>`_ or `Unified Modeling Language (UML)
<http://www.uml.org/>`_.
An :ref:`Action Plan <action_plan_definition>` has a life-cycle and its current
state may be one of the following:
- **RECOMMENDED** : the :ref:`Action Plan <action_plan_definition>` is waiting
for a validation from the :ref:`Administrator <administrator_definition>`
- **ONGOING** : the :ref:`Action Plan <action_plan_definition>` is currently
being processed by the :ref:`Watcher Applier <watcher_applier_definition>`
- **SUCCEEDED** : the :ref:`Action Plan <action_plan_definition>` has been
executed successfully (i.e. all :ref:`Actions <action_definition>` that it
contains have been executed successfully)
- **FAILED** : an error occurred while executing the
:ref:`Action Plan <action_plan_definition>`
- **DELETED** : the :ref:`Action Plan <action_plan_definition>` is still
stored in the :ref:`Watcher database <watcher_database_definition>` but is
not returned any more through the Watcher APIs.
- **CANCELLED** : the :ref:`Action Plan <action_plan_definition>` was in
**PENDING** or **ONGOING** state and was cancelled by the
:ref:`Administrator <administrator_definition>`
"""
from watcher.common import exception
from watcher.common import utils
from watcher.db import api as db_api
from watcher import objects
from watcher.objects import base
from watcher.objects import fields as wfields
[docs]class State(object):
RECOMMENDED = 'RECOMMENDED'
PENDING = 'PENDING'
ONGOING = 'ONGOING'
FAILED = 'FAILED'
SUCCEEDED = 'SUCCEEDED'
DELETED = 'DELETED'
CANCELLED = 'CANCELLED'
SUPERSEDED = 'SUPERSEDED'
@base.WatcherObjectRegistry.register
[docs]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'),
}
@base.remotable_classmethod
[docs] 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
[docs] 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
[docs] 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
[docs] 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
[docs] 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)
@base.remotable
[docs] 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
[docs] 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, db_obj, eager=False)
self.obj_refresh(obj)
self.obj_reset_changes()
@base.remotable
[docs] 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
[docs] 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)