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# src/utils/logger.py
import logging
import sys
from typing import Optional
def setup_logger(
name: str = "chatbot",
log_level: str = "INFO",
log_file: Optional[str] = None
) -> logging.Logger:
"""
Set up a comprehensive logger for the application
Args:
name (str): Name of the logger
log_level (str): Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
log_file (Optional[str]): Path to log file (optional)
Returns:
logging.Logger: Configured logger instance
"""
# Create logger
logger = logging.getLogger(name)
logger.setLevel(getattr(logging, log_level.upper()))
# Create formatters
console_formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
file_formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(filename)s:%(lineno)d - %(message)s'
)
# Console Handler
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setFormatter(console_formatter)
logger.addHandler(console_handler)
# File Handler (if log_file is provided)
if log_file:
file_handler = logging.FileHandler(log_file)
file_handler.setFormatter(file_formatter)
logger.addHandler(file_handler)
return logger
# Global logger instance
logger = setup_logger()
class AppException(Exception):
"""
Custom base exception for the application
"""
def __init__(self, message: str, error_code: Optional[str] = None):
"""
Initialize custom exception
Args:
message (str): Error message
error_code (Optional[str]): Optional error code
"""
self.message = message
self.error_code = error_code
super().__init__(self.message)
# Log the exception
logger.error(f"AppException: {message}")
class ConfigurationError(AppException):
"""Exception raised for configuration-related errors"""
pass
class LLMProviderError(AppException):
"""Exception raised for LLM provider-related errors"""
pass
class EmbeddingError(AppException):
"""Exception raised for embedding-related errors"""
pass
class VectorStoreError(AppException):
"""Exception raised for vector store-related errors"""
pass |