Question

我有一个连接管理器，其工作方式如下：

def connect(self):
    if len(connections) >= max_connections:
        raise RuntimeError("Cannot initiate new connection.")

在这种情况下，RuntimeError是正确的错误吗？或者哪种方法更好？

Answer 1

我认为您可以使用ConnectionError处理与连接问题有关的错误。
在您的情况下，您正在寻找类似 MaxConnectionLimitReachedError 的东西，您可以按如下方式从ConnectionError继承它。

class MaxConnectionLimitReachedError(ConnectionError):
    """
    Exception raised for errors occurring from maximum number 
    of connections limit being reached/exceeded.

    Attributes:
        message -- explanation of the error
        total_connections -- total number of connections when the error occurred (optional)
        max_connections -- maximum number of connections allowed (optional)
    """

    def __init__(self, message, total_connections = None, max_connections = None):
        self.total_connections = total_connections
        self.max_connections = max_connections
        self.message = message

您的用例将如下所示：

def connect(self):
    if len(connections) >= max_connections:
        message = "Maximum connection limit ({}) reached. Cannot initiate new connection."
        raise MaxConnectionLimitReachedError(message.format(max_connections))

为达到最大连接限制而提出的建议异常类型

1 个答案: