68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
"""
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Persistence (Postgresql) configuration
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2022 Concordia CERC group
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Project Coder Peter Yefi peteryefi@gmail.com
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"""
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import logging
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import os
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from pathlib import Path
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from dotenv import load_dotenv
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from sqlalchemy.ext.declarative import declarative_base
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Models = declarative_base()
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class Configuration:
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"""
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Configuration class to hold common persistence configuration
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"""
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def __init__(self, db_name: str, dotenv_path: str, app_env='TEST'):
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"""
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:param db_name: database name
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:param app_env: application environment, test or production
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:param dotenv_path: the absolute path to dotenv file
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"""
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try:
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# load environmental variables
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if not Path(dotenv_path).exists():
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error_message = f'dotenv file doesn\'t exists at {dotenv_path}'
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logging.error(error_message)
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raise FileNotFoundError(error_message)
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load_dotenv(dotenv_path=dotenv_path)
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self._db_name = db_name
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self._db_host = os.getenv(f'{app_env}_DB_HOST')
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self._db_user = os.getenv(f'{app_env}_DB_USER')
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self._db_pass = os.getenv(f'{app_env}_DB_PASSWORD')
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self._db_port = os.getenv(f'{app_env}_DB_PORT')
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self.hub_token = os.getenv('HUB_TOKEN')
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except KeyError as err:
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logging.error('Error with credentials: %s', err)
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@property
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def connection_string(self):
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"""
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Returns a connection string postgresql
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:return: connection string
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"""
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if self._db_pass:
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return f'postgresql://{self._db_user}:{self._db_pass}@{self._db_host}:{self._db_port}/{self._db_name}'
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return f'postgresql://{self._db_user}@{self._db_host}:{self._db_port}/{self._db_name}'
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@property
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def db_user(self):
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"""
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retrieve the configured username
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"""
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return self._db_user
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@property
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def db_name(self):
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"""
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retrieve the configured database name
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"""
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return self._db_name
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