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logger.py
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"""
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Centralized Logging System for Flare Platform
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"""
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import sys
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import logging
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import json
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import os
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import threading
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import traceback
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from datetime import datetime
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from enum import Enum
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from typing import Optional, Dict, Any, Union
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from pathlib import Path
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class LogLevel(Enum):
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DEBUG = "DEBUG"
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INFO = "INFO"
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WARNING = "WARNING"
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ERROR = "ERROR"
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CRITICAL = "CRITICAL"
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class FlareLogger:
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_instance = None
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_lock = threading.Lock()
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def __new__(cls):
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if cls._instance is None:
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with cls._lock:
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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cls._instance._initialized = False
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return cls._instance
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def __init__(self):
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if self._initialized:
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return
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self._initialized = True
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# Log level from environment
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self.log_level = LogLevel[os.getenv('LOG_LEVEL', 'INFO')]
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# Configure Python logging
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self.logger = logging.getLogger('flare')
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self.logger.setLevel(self.log_level.value)
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# Remove default handlers
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self.logger.handlers = []
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# Console handler with custom format
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console_handler = logging.StreamHandler(sys.stdout)
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console_handler.setFormatter(self._get_formatter())
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self.logger.addHandler(console_handler)
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# File handler for production
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if os.getenv('LOG_TO_FILE', 'false').lower() == 'true':
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log_dir = Path('logs')
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log_dir.mkdir(exist_ok=True)
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file_handler = logging.FileHandler(
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log_dir / f"flare_{datetime.now().strftime('%Y%m%d')}.log"
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)
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file_handler.setFormatter(self._get_formatter())
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self.logger.addHandler(file_handler)
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# Future: Add ElasticSearch handler here
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# if os.getenv('ELASTICSEARCH_URL'):
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# from elasticsearch_handler import ElasticsearchHandler
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# es_handler = ElasticsearchHandler(
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# hosts=[os.getenv('ELASTICSEARCH_URL')],
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# index='flare-logs'
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# )
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# self.logger.addHandler(es_handler)
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def _get_formatter(self):
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return logging.Formatter(
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'[%(asctime)s.%(msecs)03d] [%(levelname)s] [%(name)s] %(message)s',
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datefmt='%H:%M:%S'
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)
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def log(self, level: LogLevel, message: str, **kwargs):
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"""Central logging method with structured data"""
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# Add context data
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extra_data = {
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'timestamp': datetime.utcnow().isoformat(),
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'service': 'flare',
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'thread_id': threading.get_ident(),
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**kwargs
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}
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# Log with structured data
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log_message = message
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if kwargs:
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# Format kwargs for readability
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kwargs_str = json.dumps(kwargs, ensure_ascii=False, default=str)
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log_message = f"{message} | {kwargs_str}"
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getattr(self.logger, level.value.lower())(log_message, extra={'data': extra_data})
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# Always flush for real-time debugging
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sys.stdout.flush()
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def debug(self, message: str, **kwargs):
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"""Log debug message"""
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self.log(LogLevel.DEBUG, message, **kwargs)
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def info(self, message: str, **kwargs):
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"""Log info message"""
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self.log(LogLevel.INFO, message, **kwargs)
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def warning(self, message: str, **kwargs):
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"""Log warning message"""
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self.log(LogLevel.WARNING, message, **kwargs)
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def error(self, message: str, **kwargs):
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"""Log error message"""
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self.log(LogLevel.ERROR, message, **kwargs)
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def critical(self, message: str, **kwargs):
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"""Log critical message"""
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self.log(LogLevel.CRITICAL, message, **kwargs)
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def set_level(self, level: str):
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"""Dynamically change log level"""
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try:
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self.log_level = LogLevel[level.upper()]
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self.logger.setLevel(self.log_level.value)
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self.info(f"Log level changed to {level}")
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except KeyError:
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self.warning(f"Invalid log level: {level}")
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# Global logger instance
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logger = FlareLogger()
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# Convenience functions
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def log_debug(message: str, **kwargs):
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"""Log debug message"""
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logger.debug(message, **kwargs)
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def log_info(message: str, **kwargs):
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"""Log info message"""
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logger.info(message, **kwargs)
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def log_warning(message: str, **kwargs):
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"""Log warning message"""
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logger.warning(message, **kwargs)
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def log_error(message: str, exception: Optional[Exception] = None, **kwargs):
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"""
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Log error message with optional exception
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Usage:
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log_error("Error occurred")
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log_error("Error occurred", e) # Otomatik olarak str(e) ve traceback ekler
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log_error("Error occurred", error="custom error")
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log_error("Error occurred", e, extra_field="value")
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"""
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import traceback
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# Eğer exception parametresi verilmişse, otomatik olarak error ve traceback ekle
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if exception is not None:
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# Eğer kwargs'da error yoksa, exception'dan al
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if 'error' not in kwargs:
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kwargs['error'] = str(exception)
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# Exception tipini ekle
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if 'error_type' not in kwargs:
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kwargs['error_type'] = type(exception).__name__
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# Eğer kwargs'da traceback yoksa ve bu bir Exception ise, traceback ekle
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if 'traceback' not in kwargs and isinstance(exception, Exception):
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kwargs['traceback'] = traceback.format_exc()
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# Özel exception tipleri için ekstra bilgi
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if hasattr(exception, '__dict__'):
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# Custom exception'ların attribute'larını ekle
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for attr, value in exception.__dict__.items():
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if not attr.startswith('_') and attr not in kwargs:
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kwargs[f'exc_{attr}'] = value
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# HTTP status code varsa ekle
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if hasattr(exception, 'status_code') and 'status_code' not in kwargs:
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kwargs['status_code'] = exception.status_code
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# Orijinal logger'a gönder
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logger.error(message, **kwargs)
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def log_critical(message: str, **kwargs):
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"""Log critical message"""
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logger.critical(message, **kwargs)
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# Backward compatibility
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def log(message: str, level: str = "INFO", **kwargs):
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"""Legacy log function for compatibility"""
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getattr(logger, level.lower())(message, **kwargs)
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# Performance logging helpers
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class LogTimer:
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"""Context manager for timing operations"""
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def __init__(self, operation_name: str, **extra_kwargs):
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self.operation_name = operation_name
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self.extra_kwargs = extra_kwargs
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self.start_time = None
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def __enter__(self):
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self.start_time = datetime.now()
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log_debug(f"Starting {self.operation_name}", **self.extra_kwargs)
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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duration_ms = (datetime.now() - self.start_time).total_seconds() * 1000
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if exc_type:
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log_error(
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f"{self.operation_name} failed after {duration_ms:.2f}ms",
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error=str(exc_val),
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duration_ms=duration_ms,
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**self.extra_kwargs
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)
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else:
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log_info(
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f"{self.operation_name} completed in {duration_ms:.2f}ms",
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duration_ms=duration_ms,
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**self.extra_kwargs
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)
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