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# DEPENDENCIES
import sys
import time
import json
import logging
import traceback
from typing import Any
from typing import Dict
from pathlib import Path
from typing import Optional
from functools import wraps
from datetime import datetime
class ContractAnalyzerLogger:
"""
Production-grade logging for contract analysis
Features:
- Structured JSON logging
- Separate files for errors/warnings
- Request ID tracking
- Performance metrics
- Log rotation
"""
_loggers : Dict[str, logging.Logger] = dict()
_log_dir : Optional[Path] = None
# Log levels
DEBUG = logging.DEBUG
INFO = logging.INFO
WARNING = logging.WARNING
ERROR = logging.ERROR
CRITICAL = logging.CRITICAL
@classmethod
def setup(cls, log_dir: str = "logs", app_name: str = "contract_analyzer"):
"""
Setup logging system
Arguments:
----------
log_dir { str } : Directory for log files
app_name { str } : Application name for log files
"""
cls._log_dir = Path(log_dir)
cls._log_dir.mkdir(parents = True, exist_ok = True)
# Create main logger
cls._create_logger(name = app_name,
log_file = cls._log_dir / f"{app_name}.log",
level = logging.INFO,
)
# Create error logger
cls._create_logger(name = f"{app_name}.error",
log_file = cls._log_dir / f"{app_name}_error.log",
level = logging.ERROR,
)
# Create performance logger
cls._create_logger(name = f"{app_name}.performance",
log_file = cls._log_dir / f"{app_name}_performance.log",
level = logging.INFO,
)
print(f"[Logger] Logging initialized. Logs: {cls._log_dir}")
@classmethod
def _create_logger(cls, name: str, log_file: Path, level: int) -> logging.Logger:
"""
Create and configure a logger
"""
logger = logging.getLogger(name)
logger.setLevel(level)
# Clear existing handlers
logger.handlers.clear()
# File handler
file_handler = logging.FileHandler(log_file)
file_handler.setLevel(level)
# Console handler (for errors and above)
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setLevel(logging.WARNING)
# Formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s', datefmt = '%Y-%m-%d %H:%M:%S')
file_handler.setFormatter(formatter)
console_handler.setFormatter(formatter)
logger.addHandler(file_handler)
logger.addHandler(console_handler)
cls._loggers[name] = logger
return logger
@classmethod
def get_logger(cls, name: str = "contract_analyzer") -> logging.Logger:
"""
Get logger by name
"""
if name not in cls._loggers:
# Lazy initialization
cls.setup()
return cls._loggers.get(name, logging.getLogger(name))
@classmethod
def log_structured(cls, level: int, message: str, **kwargs):
"""
Log structured data as JSON
Arguments:
----------
level { int } : Log level
message { str } : Log message
**kwargs : Additional structured data
"""
logger = cls.get_logger()
log_data = {"timestamp" : datetime.now().isoformat(),
"message" : message,
**kwargs
}
logger.log(level, json.dumps(log_data))
@classmethod
def log_error(cls, error: Exception, context: Dict[str, Any] = None):
"""
Log error with full traceback and context
Arguments:
----------
error { Exception } : Exception object
context { dict } : Additional context dictionary
"""
error_logger = cls._loggers.get("contract_analyzer.error")
if not error_logger:
error_logger = cls.get_logger()
error_data = {"timestamp" : datetime.now().isoformat(),
"error_type" : type(error).__name__,
"error_message" : str(error),
"traceback" : traceback.format_exc(),
"context" : context or {},
}
error_logger.error(json.dumps(error_data, indent = 2))
@classmethod
def log_performance(cls, operation: str, duration: float, **metrics):
"""
Log performance metrics
Arguments:
----------
operation { str } : Operation name
duration { float } : Duration in seconds
**metrics : Additional metrics
"""
perf_logger = cls._loggers.get("contract_analyzer.performance")
if not perf_logger:
perf_logger = cls.get_logger()
perf_data = {"timestamp" : datetime.now().isoformat(),
"operation" : operation,
"duration_seconds" : round(duration, 3),
**metrics
}
perf_logger.info(json.dumps(perf_data))
@staticmethod
def log_execution_time(operation_name: str = None):
"""
Decorator to log execution time of functions
"""
def decorator(func):
@wraps(func)
def wrapper(*args, **kwargs):
op_name = operation_name or func.__name__
start_time = time.time()
try:
result = func(*args, **kwargs)
duration = time.time() - start_time
ContractAnalyzerLogger.log_performance(operation = op_name,
duration = duration,
status = "success",
)
return result
except Exception as e:
duration = time.time() - start_time
ContractAnalyzerLogger.log_performance(operation = op_name,
duration = duration,
status = "error",
error = str(e),
)
ContractAnalyzerLogger.log_error(e, context = {"operation" : op_name})
raise
return wrapper
return decorator
# Convenience functions
def get_logger(name: str = "contract_analyzer") -> logging.Logger:
"""
Get logger instance
"""
return ContractAnalyzerLogger.get_logger(name)
def log_info(message: str, **kwargs):
"""
Log info message
"""
ContractAnalyzerLogger.log_structured(logging.INFO, message, **kwargs)
def log_warning(message: str, **kwargs):
"""
Log warning message
"""
ContractAnalyzerLogger.log_structured(logging.WARNING, message, **kwargs)
def log_error(error: Exception, context: Dict[str, Any] = None):
"""
Log error with context
"""
ContractAnalyzerLogger.log_error(error, context)
def log_debug(message: str, **kwargs):
"""
Log debug message
"""
ContractAnalyzerLogger.log_structured(logging.DEBUG, message, **kwargs)
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