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###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
from utils.inventory_mgr import InventoryMgr
from utils.logging.full_logger import FullLogger
from utils.mongo_access import MongoAccess
from utils.singleton import Singleton
class Configuration(metaclass=Singleton):
def __init__(self, environments_collection="environments_config"):
super().__init__()
self.db_client = MongoAccess()
self.db = MongoAccess.db
self.inv = InventoryMgr()
self.collection = self.inv.collections.get(environments_collection)
self.env_name = None
self.environment = None
self.configuration = None
self.log = FullLogger()
def use_env(self, env_name):
self.log.info("Configuration taken from environment: {}".format(env_name))
self.env_name = env_name
envs = self.collection.find({"name": env_name})
if envs.count() == 0:
raise ValueError("use_env: could not find matching environment")
if envs.count() > 1:
raise ValueError("use_env: found multiple matching environments")
self.environment = envs[0]
self.configuration = self.environment["configuration"]
def get_env_config(self):
return self.environment
def get_configuration(self):
return self.configuration
def get_env_name(self):
return self.env_name
def update_env(self, values):
self.collection.update_one({"name": self.env_name},
{'$set': MongoAccess.encode_mongo_keys(values)})
def get(self, component):
try:
matches = [c for c in self.configuration if c["name"] == component]
except AttributeError:
raise ValueError("Configuration: environment not set")
if len(matches) == 0:
raise IndexError("No matches for configuration component: " + component)
if len(matches) > 1:
raise IndexError("Found multiple matches for configuration component: " + component)
return matches[0]
def has_network_plugin(self, name):
if 'mechanism_drivers' not in self.environment:
self.log.error('Environment missing mechanism_drivers definition: ' +
self.environment['name'])
mechanism_drivers = self.environment['mechanism_drivers']
return name in mechanism_drivers
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