Class LazyFileHandler

fastdeploy/logger/handlers.py:213–251

延迟创建日志文件的处理器，仅在首次写入日志时创建实际的文件处理器

class LazyFileHandler(logging.Handler):
    """
    延迟创建日志文件的处理器，仅在首次写入日志时创建实际的文件处理器
    """

    def __init__(self, filename, backupCount, level=logging.NOTSET, formatter=None):
        super().__init__(level=level)
        self.filename = filename
        self.backupCount = backupCount
        self.formatter = formatter
        self._real_handler = None

    def create_real_handler(self):
        """创建实际的文件处理器"""
        handler = DailyRotatingFileHandler(self.filename, backupCount=self.backupCount)
        handler.setLevel(self.level)
        if self.formatter:
            handler.setFormatter(self.formatter)
        return handler

    def emit(self, record):
        # 检查日志级别
        if record.levelno < self.level:
            return

        self.acquire()
        try:
            if self._real_handler is None:
                self._real_handler = self.create_real_handler()
        finally:
            self.release()
        # 将日志记录传递给实际处理器
        self._real_handler.emit(record)

    def close(self):
        # 关闭实际处理器（如果存在）
        if self._real_handler is not None:
            self._real_handler.close()
        super().close()


class DailyRotatingFileHandler(BaseRotatingHandler):