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# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# 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 logging, sqlalchemy, sqlalchemy_utils
from common.Settings import get_setting
LOGGER = logging.getLogger(__name__)
APP_NAME = 'tfs'
class Engine:
def get_engine(self) -> sqlalchemy.engine.Engine:
ccdb_url = get_setting('CCDB_URL')
try:
engine = sqlalchemy.create_engine(
ccdb_url, connect_args={'application_name': APP_NAME}, echo=False, future=True)
except: # pylint: disable=bare-except
LOGGER.exception('Failed to connect to database: {:s}'.format(ccdb_url))
return None
try:
if not sqlalchemy_utils.database_exists(engine.url):
sqlalchemy_utils.create_database(engine.url)
except: # pylint: disable=bare-except
LOGGER.exception('Failed to check/create to database: {:s}'.format(ccdb_url))
return None
return engine