d7054053ae
The word "Copyright" alone is sufficient to claim copyright, the (c) symbol need not be present.[1] As per PEP 263, a Python file with non-ASCII characters must have a line with "coding: <some-encoding>". Python files containing only 7-bit ASCII characters need no such line.[2] This commit removes unnecessary Unicode copyright symbols and unnecessary encoding lines. [1]: http://www.copyright.gov/circs/circ03.pdf [2]: http://legacy.python.org/dev/peps/pep-0263/ Closes-Bug: #1324686 Change-Id: Id381ea1f029a0cfddd3773c6d9f16c47842d9c33
108 lines
4.0 KiB
Python
108 lines
4.0 KiB
Python
#
|
|
# Copyright 2013 ZHAW SoE
|
|
# Copyright 2014 Intel Corp.
|
|
#
|
|
# Authors: Lucas Graf <graflu0@students.zhaw.ch>
|
|
# Toni Zehnder <zehndton@students.zhaw.ch>
|
|
# Lianhao Lu <lianhao.lu@intel.com>
|
|
#
|
|
# 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 class for plugins used by the hardware agent."""
|
|
|
|
import abc
|
|
import itertools
|
|
import six
|
|
|
|
from ceilometer.central import plugin
|
|
from ceilometer.hardware import inspector as insloader
|
|
from ceilometer.openstack.common.gettextutils import _
|
|
from ceilometer.openstack.common import log
|
|
from ceilometer.openstack.common import network_utils
|
|
|
|
LOG = log.getLogger(__name__)
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class HardwarePollster(plugin.CentralPollster):
|
|
"""Base class for plugins that support the polling API."""
|
|
|
|
CACHE_KEY = None
|
|
INSPECT_METHOD = None
|
|
|
|
def __init__(self):
|
|
super(HardwarePollster, self).__init__()
|
|
self.inspectors = {}
|
|
|
|
def get_samples(self, manager, cache, resources=None):
|
|
"""Return an iterable of Sample instances from polling the resources.
|
|
|
|
:param manager: The service manager invoking the plugin
|
|
:param cache: A dictionary for passing data between plugins
|
|
:param resources: end point to poll data from
|
|
"""
|
|
resources = resources or []
|
|
h_cache = cache.setdefault(self.CACHE_KEY, {})
|
|
sample_iters = []
|
|
for res in resources:
|
|
parsed_url = network_utils.urlsplit(res)
|
|
inspector = self._get_inspector(parsed_url)
|
|
func = getattr(inspector, self.INSPECT_METHOD)
|
|
|
|
try:
|
|
# Call hardware inspector to poll for the data
|
|
i_cache = h_cache.setdefault(res, {})
|
|
if res not in i_cache:
|
|
i_cache[res] = list(func(parsed_url))
|
|
# Generate samples
|
|
if i_cache[res]:
|
|
sample_iters.append(self.generate_samples(parsed_url,
|
|
i_cache[res]))
|
|
except Exception as err:
|
|
LOG.exception(_('inspector call %(func)r failed for '
|
|
'host %(host)s: %(err)s'),
|
|
dict(func=func,
|
|
host=parsed_url.hostname,
|
|
err=err))
|
|
return itertools.chain(*sample_iters)
|
|
|
|
def generate_samples(self, host_url, data):
|
|
"""Generate an iterable Sample from the data returned by inspector
|
|
|
|
:param host_url: host url of the endpoint
|
|
:param data: list of data returned by the corresponding inspector
|
|
|
|
"""
|
|
return (self.generate_one_sample(host_url, datum) for datum in data)
|
|
|
|
@abc.abstractmethod
|
|
def generate_one_sample(self, host_url, c_data):
|
|
"""Return one Sample.
|
|
|
|
:param host_url: host url of the endpoint
|
|
:param c_data: data returned by the corresponding inspector, of
|
|
one of the types defined in the file
|
|
ceilometer.hardware.inspector.base.CPUStats
|
|
"""
|
|
|
|
def _get_inspector(self, parsed_url):
|
|
if parsed_url.scheme not in self.inspectors:
|
|
try:
|
|
driver = insloader.get_inspector(parsed_url)
|
|
self.inspectors[parsed_url.scheme] = driver
|
|
except Exception as err:
|
|
LOG.exception(_("Can NOT load inspector %(name)s: %(err)s"),
|
|
dict(name=parsed_url.scheme,
|
|
err=err))
|
|
raise err
|
|
return self.inspectors[parsed_url.scheme]
|