| #!/usr/bin/env python |
| # coding=utf-8 |
| |
| """Custom logging module. |
| |
| This module is responsible to manage log messages and log file. |
| """ |
| |
| import sys |
| import os |
| import os.path |
| import logging |
| |
| DEFAULT_LOG_LEVEL = logging.INFO |
| DEFAULT_LOG_DIR = '/tmp' |
| |
| |
| class Logger(logging.getLoggerClass()): |
| """Custom logger class. |
| |
| Use this class to customize the logger behavior or to intercept the |
| messages. |
| """ |
| def error(self, msg, *args, **kwargs): |
| # Add here code to intercept the project error messages |
| super(Logger, self).error(msg, *args, **kwargs) |
| |
| def critical(self, msg, *args, **kwargs): |
| # Add here code to intercept the project critical messages |
| super(Logger, self).critical(msg, *args, **kwargs) |
| |
| |
| logging.setLoggerClass(Logger) |
| |
| |
| def get_logger(name, namespace='{{project.package}}', |
| log_level=DEFAULT_LOG_LEVEL, log_dir=DEFAULT_LOG_DIR): |
| """Build a logger that outputs to a file and to the console,""" |
| |
| log_level = (os.getenv('{}_LOG_LEVEL'.format(namespace.upper())) or |
| os.getenv('LOG_LEVEL', log_level)) |
| log_dir = (os.getenv('{}_LOG_DIR'.format(namespace.upper())) or |
| os.getenv('LOG_DIR', log_dir)) |
| |
| logger = logging.getLogger('{}.{}'.format(namespace, name)) |
| logger.setLevel(log_level) |
| |
| formatter = logging.Formatter( |
| '%(asctime)s - %(name)s - %(levelname)s - %(message)s') |
| |
| # Create a console stream handler |
| console_handler = logging.StreamHandler() |
| console_handler.setLevel(log_level) |
| console_handler.setFormatter(formatter) |
| logger.addHandler(console_handler) |
| |
| try: |
| if log_dir: |
| log_path = os.path.abspath(log_dir) |
| log_filename = '{name}.{pid}.log'.format( |
| name=namespace, pid=os.getpid()) |
| |
| file_path = str(os.path.join(log_path, log_filename)) |
| |
| if not os.path.exists(log_path): |
| os.makedirs(log_path, mode=774) |
| |
| # Create a file handler |
| file_handler = logging.FileHandler(file_path) |
| file_handler.setLevel(log_level) |
| file_handler.setFormatter(formatter) |
| logger.addHandler(file_handler) |
| except OSError as e: |
| logger.error('Could not create log file {file}: {error}'.format( |
| file=file_path, error=e.strerror)) |
| |
| return logger |
| |