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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 #
###############################################################################
import os
from pymongo import MongoClient
from utils.config_file import ConfigFile
from utils.dict_naming_converter import DictNamingConverter
from utils.logging.console_logger import ConsoleLogger
from utils.logging.file_logger import FileLogger
# Provides access to MongoDB using PyMongo library
#
# Notes on authentication:
# default config file is calipso_mongo_access.conf
# you can also specify name of file from CLI with --mongo_config
class MongoAccess(DictNamingConverter):
client = None
db = None
default_conf_file = '/local_dir/calipso_mongo_access.conf'
config_file = None
DB_NAME = 'calipso'
LOG_FILENAME = 'mongo_access.log'
DEFAULT_LOG_FILE = os.path.join(os.path.abspath("."), LOG_FILENAME)
def __init__(self):
super().__init__()
self.log_file = os.path.join(FileLogger.LOG_DIRECTORY,
MongoAccess.LOG_FILENAME)
try:
self.log = FileLogger(self.log_file)
except OSError as e:
ConsoleLogger().warning("Couldn't use file {} for logging. "
"Using default location: {}.\n"
"Error: {}"
.format(self.log_file,
self.DEFAULT_LOG_FILE,
e))
self.log_file = self.DEFAULT_LOG_FILE
self.log = FileLogger(self.log_file)
self.connect_params = {}
self.mongo_connect(self.config_file)
def is_db_ready(self) -> bool:
return MongoAccess.client is not None
@staticmethod
def set_config_file(_conf_file):
MongoAccess.config_file = _conf_file
def mongo_connect(self, config_file_path=""):
if MongoAccess.client:
return
self.connect_params = {
"server": "localhost",
"port": 27017
}
if not config_file_path:
config_file_path = self.default_conf_file
try:
config_file = ConfigFile(config_file_path)
# read connection parameters from config file
config_params = config_file.read_config()
self.connect_params.update(config_params)
except Exception as e:
self.log.exception(e)
raise
self.prepare_connect_uri()
MongoAccess.client = MongoClient(
self.connect_params["server"],
self.connect_params["port"]
)
MongoAccess.db = getattr(MongoAccess.client,
config_params.get('auth_db', self.DB_NAME))
MongoAccess.db.authenticate(name=self.connect_params['user'],
password=self.connect_params['pwd'])
self.log.info('Connected to MongoDB')
def prepare_connect_uri(self):
params = self.connect_params
self.log.debug('connecting to MongoDB server: {}'
.format(params['server']))
uri = 'mongodb://'
if 'pwd' in params:
uri = uri + params['user'] + ':' + params['pwd'] + '@'
else:
self.log.info('MongoDB credentials missing')
uri = uri + params['server']
if 'auth_db' in params:
uri = uri + '/' + params['auth_db']
self.connect_params['server'] = uri
@staticmethod
def update_document(collection, document, upsert=False):
if isinstance(collection, str):
collection = MongoAccess.db[collection]
doc_id = document.pop('_id')
collection.update_one({'_id': doc_id}, {'$set': document},
upsert=upsert)
document['_id'] = doc_id
@staticmethod
def encode_dots(s):
return s.replace(".", "[dot]")
@staticmethod
def decode_dots(s):
return s.replace("[dot]", ".")
# Mongo will not accept dot (".") in keys, or $ in start of keys
# $ in beginning of key does not happen in OpenStack,
# so need to translate only "." --> "[dot]"
@staticmethod
def encode_mongo_keys(item):
return MongoAccess.change_dict_naming_convention(item, MongoAccess.encode_dots)
@staticmethod
def decode_mongo_keys(item):
return MongoAccess.change_dict_naming_convention(item, MongoAccess.decode_dots)
@staticmethod
def decode_object_id(item: dict):
return dict(item, **{"_id": str(item["_id"])}) if item and "_id" in item else item
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