# -*- encoding: utf-8 -*-
# Copyright 2013 Red Hat, Inc.
# All Rights Reserved.
#
# 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.
"""
A :ref:`Goal <goal_definition>` is a human readable, observable and measurable
end result having one objective to be achieved.
Here are some examples of :ref:`Goals <goal_definition>`:
- minimize the energy consumption
- minimize the number of compute nodes (consolidation)
- balance the workload among compute nodes
- minimize the license cost (some softwares have a licensing model which is
based on the number of sockets or cores where the software is deployed)
- find the most appropriate moment for a planned maintenance on a
given group of host (which may be an entire availability zone):
power supply replacement, cooling system replacement, hardware
modification, ...
"""
import pecan
from pecan import rest
import wsme
from wsme import types as wtypes
import wsmeext.pecan as wsme_pecan
from watcher.api.controllers import base
from watcher.api.controllers import link
from watcher.api.controllers.v1 import collection
from watcher.api.controllers.v1 import types
from watcher.api.controllers.v1 import utils as api_utils
from watcher.common import exception
from watcher.common import policy
from watcher import objects
[docs]class Goal(base.APIBase):
"""API representation of a goal.
This class enforces type checking and value constraints, and converts
between the internal object model and the API representation of a goal.
"""
uuid = types.uuid
"""Unique UUID for this goal"""
name = wtypes.text
"""Name of the goal"""
display_name = wtypes.text
"""Localized name of the goal"""
efficacy_specification = wtypes.wsattr(types.jsontype, readonly=True)
"""Efficacy specification for this goal"""
links = wsme.wsattr([link.Link], readonly=True)
"""A list containing a self link and associated audit template links"""
def __init__(self, **kwargs):
self.fields = []
fields = list(objects.Goal.fields)
for k in fields:
# Skip fields we do not expose.
if not hasattr(self, k):
continue
self.fields.append(k)
setattr(self, k, kwargs.get(k, wtypes.Unset))
@staticmethod
def _convert_with_links(goal, url, expand=True):
if not expand:
goal.unset_fields_except(['uuid', 'name', 'display_name',
'efficacy_specification'])
goal.links = [link.Link.make_link('self', url,
'goals', goal.uuid),
link.Link.make_link('bookmark', url,
'goals', goal.uuid,
bookmark=True)]
return goal
[docs] @classmethod
def convert_with_links(cls, goal, expand=True):
goal = Goal(**goal.as_dict())
return cls._convert_with_links(goal, pecan.request.host_url, expand)
[docs] @classmethod
def sample(cls, expand=True):
sample = cls(
uuid='27e3153e-d5bf-4b7e-b517-fb518e17f34c',
name='DUMMY',
display_name='Dummy strategy',
efficacy_specification=[
{'description': 'Dummy indicator', 'name': 'dummy',
'schema': 'Range(min=0, max=100, min_included=True, '
'max_included=True, msg=None)',
'unit': '%'}
])
return cls._convert_with_links(sample, 'http://localhost:9322', expand)
[docs]class GoalCollection(collection.Collection):
"""API representation of a collection of goals."""
goals = [Goal]
"""A list containing goals objects"""
def __init__(self, **kwargs):
super(GoalCollection, self).__init__()
self._type = 'goals'
[docs] @staticmethod
def convert_with_links(goals, limit, url=None, expand=False,
**kwargs):
goal_collection = GoalCollection()
goal_collection.goals = [
Goal.convert_with_links(g, expand) for g in goals]
goal_collection.next = goal_collection.get_next(
limit, url=url, **kwargs)
return goal_collection
[docs] @classmethod
def sample(cls):
sample = cls()
sample.goals = [Goal.sample(expand=False)]
return sample
[docs]class GoalsController(rest.RestController):
"""REST controller for Goals."""
def __init__(self):
super(GoalsController, self).__init__()
from_goals = False
"""A flag to indicate if the requests to this controller are coming
from the top-level resource Goals."""
_custom_actions = {
'detail': ['GET'],
}
def _get_goals_collection(self, marker, limit, sort_key, sort_dir,
expand=False, resource_url=None):
api_utils.validate_sort_key(
sort_key, list(objects.Goal.fields))
limit = api_utils.validate_limit(limit)
api_utils.validate_sort_dir(sort_dir)
marker_obj = None
if marker:
marker_obj = objects.Goal.get_by_uuid(
pecan.request.context, marker)
sort_db_key = (sort_key if sort_key in objects.Goal.fields
else None)
goals = objects.Goal.list(pecan.request.context, limit, marker_obj,
sort_key=sort_db_key, sort_dir=sort_dir)
return GoalCollection.convert_with_links(goals, limit,
url=resource_url,
expand=expand,
sort_key=sort_key,
sort_dir=sort_dir)
[docs] @wsme_pecan.wsexpose(GoalCollection, wtypes.text,
int, wtypes.text, wtypes.text)
def get_all(self, marker=None, limit=None, sort_key='id', sort_dir='asc'):
"""Retrieve a list of goals.
:param marker: pagination marker for large data sets.
:param limit: maximum number of resources to return in a single result.
:param sort_key: column to sort results by. Default: id.
:param sort_dir: direction to sort. "asc" or "desc". Default: asc.
"""
context = pecan.request.context
policy.enforce(context, 'goal:get_all',
action='goal:get_all')
return self._get_goals_collection(marker, limit, sort_key, sort_dir)
[docs] @wsme_pecan.wsexpose(GoalCollection, wtypes.text, int,
wtypes.text, wtypes.text)
def detail(self, marker=None, limit=None, sort_key='id', sort_dir='asc'):
"""Retrieve a list of goals with detail.
:param marker: pagination marker for large data sets.
:param limit: maximum number of resources to return in a single result.
:param sort_key: column to sort results by. Default: id.
:param sort_dir: direction to sort. "asc" or "desc". Default: asc.
"""
context = pecan.request.context
policy.enforce(context, 'goal:detail',
action='goal:detail')
# NOTE(lucasagomes): /detail should only work agaist collections
parent = pecan.request.path.split('/')[:-1][-1]
if parent != "goals":
raise exception.HTTPNotFound
expand = True
resource_url = '/'.join(['goals', 'detail'])
return self._get_goals_collection(marker, limit, sort_key, sort_dir,
expand, resource_url)
[docs] @wsme_pecan.wsexpose(Goal, wtypes.text)
def get_one(self, goal):
"""Retrieve information about the given goal.
:param goal: UUID or name of the goal.
"""
if self.from_goals:
raise exception.OperationNotPermitted
context = pecan.request.context
rpc_goal = api_utils.get_resource('Goal', goal)
policy.enforce(context, 'goal:get', rpc_goal, action='goal:get')
return Goal.convert_with_links(rpc_goal)
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