Source code for ceilometer.api.controllers.v2.capabilities

# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2013 IBM Corp.
# Copyright 2013 eNovance <>
# Copyright Ericsson AB 2013. All rights reserved
# Copyright 2014 Hewlett-Packard Company
# Copyright 2015 Huawei Technologies Co., Ltd.
# 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
# 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.

import pecan
from pecan import rest
from wsme import types as wtypes
import wsmeext.pecan as wsme_pecan

from ceilometer.api.controllers.v2 import base
from ceilometer import utils

def _flatten_capabilities(capabilities):
    return dict((k, v) for k, v in utils.recursive_keypairs(capabilities))

[docs]class Capabilities(base.Base): """A representation of the API and storage capabilities. Usually constrained by restrictions imposed by the storage driver. """ api = {wtypes.text: bool} "A flattened dictionary of API capabilities" storage = {wtypes.text: bool} "A flattened dictionary of storage capabilities" event_storage = {wtypes.text: bool} "A flattened dictionary of event storage capabilities" @classmethod
[docs] def sample(cls): return cls( api=_flatten_capabilities({ 'meters': {'query': {'simple': True, 'metadata': True}}, 'resources': {'query': {'simple': True, 'metadata': True}}, 'samples': {'query': {'simple': True, 'metadata': True, 'complex': True}}, 'statistics': {'groupby': True, 'query': {'simple': True, 'metadata': True}, 'aggregation': {'standard': True, 'selectable': { 'max': True, 'min': True, 'sum': True, 'avg': True, 'count': True, 'stddev': True, 'cardinality': True, 'quartile': False}}}, 'events': {'query': {'simple': True}}, }), storage=_flatten_capabilities( {'storage': {'production_ready': True}}), event_storage=_flatten_capabilities( {'storage': {'production_ready': True}}), )
[docs]class CapabilitiesController(rest.RestController): """Manages capabilities queries.""" @wsme_pecan.wsexpose(Capabilities)
[docs] def get(self): """Returns a flattened dictionary of API capabilities. Capabilities supported by the currently configured storage driver. """ # variation in API capabilities is effectively determined by # the lack of strict feature parity across storage drivers conn = pecan.request.storage_conn event_conn = pecan.request.event_storage_conn driver_capabilities = conn.get_capabilities().copy() driver_capabilities['events'] = event_conn.get_capabilities()['events'] driver_perf = conn.get_storage_capabilities() event_driver_perf = event_conn.get_storage_capabilities() return Capabilities(api=_flatten_capabilities(driver_capabilities), storage=_flatten_capabilities(driver_perf), event_storage=_flatten_capabilities( event_driver_perf))

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