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"""
Logging configuration for the detection demo application.
Provides centralized logging setup with proper formatting and levels.
"""
import logging
import sys
from pathlib import Path
class LoggerManager:
"""Singleton logger manager for the application."""
_instance = None
_initialized = False
def __new__(cls):
if cls._instance is None:
cls._instance = super().__new__(cls)
return cls._instance
def __init__(self):
if not self._initialized:
self._setup_default_logging()
self._initialized = True
def _setup_default_logging(self):
"""Setup default logging configuration."""
# Create main logger
self.logger = logging.getLogger("detection-demo")
self.logger.setLevel(logging.INFO)
# Prevent duplicate handlers
if self.logger.handlers:
return
# Console handler
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setLevel(logging.INFO)
console_formatter = logging.Formatter(
fmt="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
datefmt="%H:%M:%S",
)
console_handler.setFormatter(console_formatter)
self.logger.addHandler(console_handler)
# File handler (logs/app.log)
log_file = Path("logs/app.log")
log_file.parent.mkdir(parents=True, exist_ok=True)
file_handler = logging.FileHandler(log_file)
file_handler.setLevel(logging.DEBUG)
file_formatter = logging.Formatter(
fmt="%(asctime)s - %(name)s - %(levelname)s - %(funcName)s:%(lineno)d - %(message)s",
datefmt="%Y-%m-%d %H:%M:%S",
)
file_handler.setFormatter(file_formatter)
self.logger.addHandler(file_handler)
def get_logger(self, name: str = None) -> logging.Logger:
"""Get a logger instance."""
if name:
return logging.getLogger(f"detection-demo.{name}")
return self.logger
# Global logger manager instance
_logger_manager = LoggerManager()
def get_logger(name: str = None) -> logging.Logger:
"""
Get a logger instance for the application.
Args:
name: Optional module name (will be prefixed with app name)
Returns:
Logger instance
"""
return _logger_manager.get_logger(name)
# Module-level logger
logger = get_logger(__name__)
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