/usr/lib/python2.7/dist-packages/aodh/api/controllers/v2/capabilities.py is in python-aodh 2.0.0-0ubuntu1.
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# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2013 IBM Corp.
# Copyright 2013 eNovance <licensing@enovance.com>
# 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
#
# 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.
import pecan
from pecan import rest
import six
from wsme import types as wtypes
import wsmeext.pecan as wsme_pecan
from aodh.api.controllers.v2 import base
def _decode_unicode(input):
"""Decode the unicode of the message, and encode it into utf-8."""
if isinstance(input, dict):
temp = {}
# If the input data is a dict, create an equivalent dict with a
# predictable insertion order to avoid inconsistencies in the
# message signature computation for equivalent payloads modulo
# ordering
for key, value in sorted(six.iteritems(input)):
temp[_decode_unicode(key)] = _decode_unicode(value)
return temp
elif isinstance(input, (tuple, list)):
# When doing a pair of JSON encode/decode operations to the tuple,
# the tuple would become list. So we have to generate the value as
# list here.
return [_decode_unicode(element) for element in input]
elif isinstance(input, six.text_type):
return input.encode('utf-8')
else:
return input
def _recursive_keypairs(d, separator=':'):
"""Generator that produces sequence of keypairs for nested dictionaries."""
for name, value in sorted(six.iteritems(d)):
if isinstance(value, dict):
for subname, subvalue in _recursive_keypairs(value, separator):
yield ('%s%s%s' % (name, separator, subname), subvalue)
elif isinstance(value, (tuple, list)):
yield name, _decode_unicode(value)
else:
yield name, value
def _flatten_capabilities(capabilities):
return dict((k, v) for k, v in _recursive_keypairs(capabilities))
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"
alarm_storage = {wtypes.text: bool}
"A flattened dictionary of alarm storage capabilities"
@classmethod
def sample(cls):
return cls(
api=_flatten_capabilities({
'alarms': {'query': {'simple': True,
'complex': True},
'history': {'query': {'simple': True,
'complex': True}}},
}),
alarm_storage=_flatten_capabilities(
{'storage': {'production_ready': True}}),
)
class CapabilitiesController(rest.RestController):
"""Manages capabilities queries."""
@wsme_pecan.wsexpose(Capabilities)
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
alarm_conn = pecan.request.alarm_storage_conn
driver_capabilities = {
'alarms': alarm_conn.get_capabilities()['alarms'],
}
alarm_driver_perf = alarm_conn.get_storage_capabilities()
return Capabilities(api=_flatten_capabilities(driver_capabilities),
alarm_storage=_flatten_capabilities(
alarm_driver_perf))
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