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Diffstat (limited to 'ceilometerclient/apiclient/base.py')
| -rw-r--r-- | ceilometerclient/apiclient/base.py | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/ceilometerclient/apiclient/base.py b/ceilometerclient/apiclient/base.py deleted file mode 100644 index 6e9990a..0000000 --- a/ceilometerclient/apiclient/base.py +++ /dev/null @@ -1,535 +0,0 @@ -# Copyright 2010 Jacob Kaplan-Moss -# Copyright 2011 OpenStack Foundation -# Copyright 2012 Grid Dynamics -# Copyright 2013 OpenStack Foundation -# 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. - -""" -Base utilities to build API operation managers and objects on top of. -""" - -######################################################################## -# -# THIS MODULE IS DEPRECATED -# -# Please refer to -# https://etherpad.openstack.org/p/kilo-ceilometerclient-library-proposals for -# the discussion leading to this deprecation. -# -# We recommend checking out the python-openstacksdk project -# (https://launchpad.net/python-openstacksdk) instead. -# -######################################################################## - - -# E1102: %s is not callable -# pylint: disable=E1102 - -import abc -import copy - -from oslo_utils import reflection -from oslo_utils import strutils -import six -from six.moves.urllib import parse - -from ceilometerclient.apiclient import exceptions -from ceilometerclient.i18n import _ - - -def getid(obj): - """Return id if argument is a Resource. - - Abstracts the common pattern of allowing both an object or an object's ID - (UUID) as a parameter when dealing with relationships. - """ - try: - if obj.uuid: - return obj.uuid - except AttributeError: - pass - try: - return obj.id - except AttributeError: - return obj - - -# TODO(aababilov): call run_hooks() in HookableMixin's child classes -class HookableMixin(object): - """Mixin so classes can register and run hooks.""" - _hooks_map = {} - - @classmethod - def add_hook(cls, hook_type, hook_func): - """Add a new hook of specified type. - - :param cls: class that registers hooks - :param hook_type: hook type, e.g., '__pre_parse_args__' - :param hook_func: hook function - """ - if hook_type not in cls._hooks_map: - cls._hooks_map[hook_type] = [] - - cls._hooks_map[hook_type].append(hook_func) - - @classmethod - def run_hooks(cls, hook_type, *args, **kwargs): - """Run all hooks of specified type. - - :param cls: class that registers hooks - :param hook_type: hook type, e.g., '__pre_parse_args__' - :param args: args to be passed to every hook function - :param kwargs: kwargs to be passed to every hook function - """ - hook_funcs = cls._hooks_map.get(hook_type) or [] - for hook_func in hook_funcs: - hook_func(*args, **kwargs) - - -class BaseManager(HookableMixin): - """Basic manager type providing common operations. - - Managers interact with a particular type of API (servers, flavors, images, - etc.) and provide CRUD operations for them. - """ - resource_class = None - - def __init__(self, client): - """Initializes BaseManager with `client`. - - :param client: instance of BaseClient descendant for HTTP requests - """ - super(BaseManager, self).__init__() - self.client = client - - def _list(self, url, response_key=None, obj_class=None, json=None): - """List the collection. - - :param url: a partial URL, e.g., '/servers' - :param response_key: the key to be looked up in response dictionary, - e.g., 'servers'. If response_key is None - all response body - will be used. - :param obj_class: class for constructing the returned objects - (self.resource_class will be used by default) - :param json: data that will be encoded as JSON and passed in POST - request (GET will be sent by default) - """ - if json: - body = self.client.post(url, json=json).json() - else: - body = self.client.get(url).json() - - if obj_class is None: - obj_class = self.resource_class - - data = body[response_key] if response_key is not None else body - # NOTE(ja): keystone returns values as list as {'values': [ ... ]} - # unlike other services which just return the list... - try: - data = data['values'] - except (KeyError, TypeError): - pass - - return [obj_class(self, res, loaded=True) for res in data if res] - - def _get(self, url, response_key=None): - """Get an object from collection. - - :param url: a partial URL, e.g., '/servers' - :param response_key: the key to be looked up in response dictionary, - e.g., 'server'. If response_key is None - all response body - will be used. - """ - body = self.client.get(url).json() - data = body[response_key] if response_key is not None else body - return self.resource_class(self, data, loaded=True) - - def _head(self, url): - """Retrieve request headers for an object. - - :param url: a partial URL, e.g., '/servers' - """ - resp = self.client.head(url) - return resp.status_code == 204 - - def _post(self, url, json, response_key=None, return_raw=False): - """Create an object. - - :param url: a partial URL, e.g., '/servers' - :param json: data that will be encoded as JSON and passed in POST - request (GET will be sent by default) - :param response_key: the key to be looked up in response dictionary, - e.g., 'server'. If response_key is None - all response body - will be used. - :param return_raw: flag to force returning raw JSON instead of - Python object of self.resource_class - """ - body = self.client.post(url, json=json).json() - data = body[response_key] if response_key is not None else body - if return_raw: - return data - return self.resource_class(self, data) - - def _put(self, url, json=None, response_key=None): - """Update an object with PUT method. - - :param url: a partial URL, e.g., '/servers' - :param json: data that will be encoded as JSON and passed in POST - request (GET will be sent by default) - :param response_key: the key to be looked up in response dictionary, - e.g., 'servers'. If response_key is None - all response body - will be used. - """ - resp = self.client.put(url, json=json) - # PUT requests may not return a body - if resp.content: - body = resp.json() - if response_key is not None: - return self.resource_class(self, body[response_key]) - else: - return self.resource_class(self, body) - - def _patch(self, url, json=None, response_key=None): - """Update an object with PATCH method. - - :param url: a partial URL, e.g., '/servers' - :param json: data that will be encoded as JSON and passed in POST - request (GET will be sent by default) - :param response_key: the key to be looked up in response dictionary, - e.g., 'servers'. If response_key is None - all response body - will be used. - """ - body = self.client.patch(url, json=json).json() - if response_key is not None: - return self.resource_class(self, body[response_key]) - else: - return self.resource_class(self, body) - - def _delete(self, url): - """Delete an object. - - :param url: a partial URL, e.g., '/servers/my-server' - """ - return self.client.delete(url) - - -@six.add_metaclass(abc.ABCMeta) -class ManagerWithFind(BaseManager): - """Manager with additional `find()`/`findall()` methods.""" - - @abc.abstractmethod - def list(self): - pass - - def find(self, **kwargs): - """Find a single item with attributes matching ``**kwargs``. - - This isn't very efficient: it loads the entire list then filters on - the Python side. - """ - matches = self.findall(**kwargs) - num_matches = len(matches) - if num_matches == 0: - msg = _("No %(name)s matching %(args)s.") % { - 'name': self.resource_class.__name__, - 'args': kwargs - } - raise exceptions.NotFound(msg) - elif num_matches > 1: - raise exceptions.NoUniqueMatch() - else: - return matches[0] - - def findall(self, **kwargs): - """Find all items with attributes matching ``**kwargs``. - - This isn't very efficient: it loads the entire list then filters on - the Python side. - """ - found = [] - searches = kwargs.items() - - for obj in self.list(): - try: - if all(getattr(obj, attr) == value - for (attr, value) in searches): - found.append(obj) - except AttributeError: - continue - - return found - - -class CrudManager(BaseManager): - """Base manager class for manipulating entities. - - Children of this class are expected to define a `collection_key` and `key`. - - - `collection_key`: Usually a plural noun by convention (e.g. `entities`); - used to refer collections in both URL's (e.g. `/v3/entities`) and JSON - objects containing a list of member resources (e.g. `{'entities': [{}, - {}, {}]}`). - - `key`: Usually a singular noun by convention (e.g. `entity`); used to - refer to an individual member of the collection. - - """ - collection_key = None - key = None - - def build_url(self, base_url=None, **kwargs): - """Builds a resource URL for the given kwargs. - - Given an example collection where `collection_key = 'entities'` and - `key = 'entity'`, the following URL's could be generated. - - By default, the URL will represent a collection of entities, e.g.:: - - /entities - - If kwargs contains an `entity_id`, then the URL will represent a - specific member, e.g.:: - - /entities/{entity_id} - - :param base_url: if provided, the generated URL will be appended to it - """ - url = base_url if base_url is not None else '' - - url += '/%s' % self.collection_key - - # do we have a specific entity? - entity_id = kwargs.get('%s_id' % self.key) - if entity_id is not None: - url += '/%s' % entity_id - - return url - - def _filter_kwargs(self, kwargs): - """Drop null values and handle ids.""" - for key, ref in six.iteritems(kwargs.copy()): - if ref is None: - kwargs.pop(key) - else: - if isinstance(ref, Resource): - kwargs.pop(key) - kwargs['%s_id' % key] = getid(ref) - return kwargs - - def create(self, **kwargs): - kwargs = self._filter_kwargs(kwargs) - return self._post( - self.build_url(**kwargs), - {self.key: kwargs}, - self.key) - - def get(self, **kwargs): - kwargs = self._filter_kwargs(kwargs) - return self._get( - self.build_url(**kwargs), - self.key) - - def head(self, **kwargs): - kwargs = self._filter_kwargs(kwargs) - return self._head(self.build_url(**kwargs)) - - def list(self, base_url=None, **kwargs): - """List the collection. - - :param base_url: if provided, the generated URL will be appended to it - """ - kwargs = self._filter_kwargs(kwargs) - - return self._list( - '%(base_url)s%(query)s' % { - 'base_url': self.build_url(base_url=base_url, **kwargs), - 'query': '?%s' % parse.urlencode(kwargs) if kwargs else '', - }, - self.collection_key) - - def put(self, base_url=None, **kwargs): - """Update an element. - - :param base_url: if provided, the generated URL will be appended to it - """ - kwargs = self._filter_kwargs(kwargs) - - return self._put(self.build_url(base_url=base_url, **kwargs)) - - def update(self, **kwargs): - kwargs = self._filter_kwargs(kwargs) - params = kwargs.copy() - params.pop('%s_id' % self.key) - - return self._patch( - self.build_url(**kwargs), - {self.key: params}, - self.key) - - def delete(self, **kwargs): - kwargs = self._filter_kwargs(kwargs) - - return self._delete( - self.build_url(**kwargs)) - - def find(self, base_url=None, **kwargs): - """Find a single item with attributes matching ``**kwargs``. - - :param base_url: if provided, the generated URL will be appended to it - """ - kwargs = self._filter_kwargs(kwargs) - - rl = self._list( - '%(base_url)s%(query)s' % { - 'base_url': self.build_url(base_url=base_url, **kwargs), - 'query': '?%s' % parse.urlencode(kwargs) if kwargs else '', - }, - self.collection_key) - num = len(rl) - - if num == 0: - msg = _("No %(name)s matching %(args)s.") % { - 'name': self.resource_class.__name__, - 'args': kwargs - } - raise exceptions.NotFound(404, msg) - elif num > 1: - raise exceptions.NoUniqueMatch - else: - return rl[0] - - -class Extension(HookableMixin): - """Extension descriptor.""" - - SUPPORTED_HOOKS = ('__pre_parse_args__', '__post_parse_args__') - manager_class = None - - def __init__(self, name, module): - super(Extension, self).__init__() - self.name = name - self.module = module - self._parse_extension_module() - - def _parse_extension_module(self): - self.manager_class = None - for attr_name, attr_value in self.module.__dict__.items(): - if attr_name in self.SUPPORTED_HOOKS: - self.add_hook(attr_name, attr_value) - else: - try: - if issubclass(attr_value, BaseManager): - self.manager_class = attr_value - except TypeError: - pass - - def __repr__(self): - return "<Extension '%s'>" % self.name - - -class Resource(object): - """Base class for OpenStack resources (tenant, user, etc.). - - This is pretty much just a bag for attributes. - """ - - HUMAN_ID = False - NAME_ATTR = 'name' - - def __init__(self, manager, info, loaded=False): - """Populate and bind to a manager. - - :param manager: BaseManager object - :param info: dictionary representing resource attributes - :param loaded: prevent lazy-loading if set to True - """ - self.manager = manager - self._info = info - self._add_details(info) - self._loaded = loaded - - def __repr__(self): - reprkeys = sorted(k - for k in self.__dict__.keys() - if k[0] != '_' and k != 'manager') - info = ", ".join("%s=%s" % (k, getattr(self, k)) for k in reprkeys) - self_cls_name = reflection.get_class_name(self, - fully_qualified=False) - return "<%s %s>" % (self_cls_name, info) - - @property - def human_id(self): - """Human-readable ID which can be used for bash completion.""" - if self.HUMAN_ID: - name = getattr(self, self.NAME_ATTR, None) - if name is not None: - return strutils.to_slug(name) - return None - - def _add_details(self, info): - for (k, v) in six.iteritems(info): - try: - setattr(self, k, v) - self._info[k] = v - except AttributeError: - # In this case we already defined the attribute on the class - pass - - def __getattr__(self, k): - if k not in self.__dict__: - # NOTE(bcwaldon): disallow lazy-loading if already loaded once - if not self.is_loaded(): - self.get() - return self.__getattr__(k) - - raise AttributeError(k) - else: - return self.__dict__[k] - - def get(self): - """Support for lazy loading details. - - Some clients, such as novaclient have the option to lazy load the - details, details which can be loaded with this function. - """ - # set_loaded() first ... so if we have to bail, we know we tried. - self.set_loaded(True) - if not hasattr(self.manager, 'get'): - return - - new = self.manager.get(self.id) - if new: - self._add_details(new._info) - self._add_details( - {'x_request_id': self.manager.client.last_request_id}) - - def __eq__(self, other): - if not isinstance(other, Resource): - return NotImplemented - # two resources of different types are not equal - if not isinstance(other, self.__class__): - return False - return self._info == other._info - - def __ne__(self, other): - return not self.__eq__(other) - - def is_loaded(self): - return self._loaded - - def set_loaded(self, val): - self._loaded = val - - def to_dict(self): - return copy.deepcopy(self._info) |