0c0d8f00a9
More specifically uses global CONF for the quantum.conf file.
Added support for the RYU plugin (similar to ovs and lb,
which use non-global conf for plugins)
patch 27: clean up find_config_file
patch 28: for config file use old paths (plugin unit tests)
this hopefully will be replaced when we move to common
config file
patch 30: rebase and merge (utils.py and policy.py)
Change-Id: Ic0bf5bdd44f24a557240f7afe4e070dee448c63c
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2011 Nicira Networks, 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.
|
|
# @author: Somik Behera, Nicira Networks, Inc.
|
|
|
|
"""
|
|
Quantum's Manager class is responsible for parsing a config file and
|
|
instantiating the correct plugin that concretely implement quantum_plugin_base
|
|
class.
|
|
The caller should make sure that QuantumManager is a singleton.
|
|
"""
|
|
|
|
import logging
|
|
|
|
from quantum.common.exceptions import ClassNotFound
|
|
from quantum.openstack.common import cfg
|
|
from quantum.openstack.common import importutils
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
def get_plugin(plugin_provider):
|
|
# If the plugin can't be found let them know gracefully
|
|
try:
|
|
LOG.info("Loading Plugin: %s" % plugin_provider)
|
|
plugin_klass = importutils.import_class(plugin_provider)
|
|
except ClassNotFound:
|
|
LOG.exception("Error loading plugin")
|
|
raise Exception("Plugin not found. You can install a "
|
|
"plugin with: pip install <plugin-name>\n"
|
|
"Example: pip install quantum-sample-plugin")
|
|
return plugin_klass()
|
|
|
|
|
|
class QuantumManager(object):
|
|
|
|
_instance = None
|
|
|
|
def __init__(self, options=None, config_file=None):
|
|
# If no options have been provided, create an empty dict
|
|
if not options:
|
|
options = {}
|
|
|
|
# NOTE(jkoelker) Testing for the subclass with the __subclasshook__
|
|
# breaks tach monitoring. It has been removed
|
|
# intentianally to allow v2 plugins to be monitored
|
|
# for performance metrics.
|
|
plugin_provider = cfg.CONF.core_plugin
|
|
LOG.debug("Plugin location:%s", plugin_provider)
|
|
self.plugin = get_plugin(plugin_provider)
|
|
|
|
@classmethod
|
|
def get_plugin(cls):
|
|
if cls._instance is None:
|
|
cls._instance = cls()
|
|
return cls._instance.plugin
|