#!/usr/bin/env python
# -*- coding: utf-8 -*-
###############################################################################
# Copyright 2013 Kitware Inc.
#
# 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.
###############################################################################
import pymongo
from pymongo.read_preferences import ReadPreference
from girder.utility import config
from girder.constants import TerminalColor
_dbClient = None
[docs]def getDbConfig():
"""Get the database configuration values from the cherrypy config."""
cfg = config.getConfig()
if 'database' in cfg:
return cfg['database']
else:
return {}
[docs]def getDbConnection():
"""
Get a MongoClient object that is connected to the configured database.
We lazy-instantiate a module-level singleton, the MongoClient objects
manage their own connection pools internally.
"""
global _dbClient
if _dbClient is not None:
return _dbClient
dbConf = getDbConfig()
if not dbConf.get('uri'):
dbUriRedacted = 'mongodb://localhost:27017/girder'
print(TerminalColor.warning('WARNING: No MongoDB URI specified, using '
'the default value'))
_dbClient = pymongo.MongoClient(dbUriRedacted)
else:
parts = dbConf['uri'].split('@')
if len(parts) == 2:
dbUriRedacted = 'mongodb://' + parts[1]
else:
dbUriRedacted = dbConf['uri']
replicaSet = dbConf.get('replica_set')
if replicaSet:
_dbClient = pymongo.MongoReplicaSetClient(
dbConf['uri'], replicaSet=replicaSet)
_dbClient.read_preference = ReadPreference.SECONDARY_PREFERRED
else:
_dbClient = pymongo.MongoClient(dbConf['uri'])
print(TerminalColor.info('Connected to MongoDB: {}'
.format(dbUriRedacted)))
return _dbClient