拯救如何进一步提高或忘记例外

Question

如何在埃菲尔铁塔中举起 exception further？我有3个案例

我想重试

a_feature
    local
        l_retries_count: INTEGER
    do
        some_potential_failing_feature
    rescue
        if l_retries_count <= 3 then
            l_retries_count := l_retries_count + 1
            retry
        end
    end

我想关闭数据库连接并忽略异常

a_feature
    do
        some_potential_failing_feature
    rescue
        db_connection.close
    end

我想关闭数据库连接并发送电子邮件给管理员并忽略

a_feature
    do
        some_potential_failing_feature
    rescue
        db_connection.close
        send_email_to_admin
    end

我想关闭db_connection并进一步引发异常，我会把我能想到的所有情况都放在上面的代码中

a_feature
    local
        l_retries_count: INTEGER
    do
        some_potential_failing_feature
    rescue
        if l_retries_count <= 3 then
            l_retries_count := l_retries_count + 1
            log_error ("Error, retrying for " + l_retries_count.out + "th time")
            retry
        else
            db_connection.close
            send_email_to_admin
            -- raise the_created_exception_from_some_potential_failing_feature -- how do I do that?
        end
    end

Answer 1

您可以尝试以下方法之一：

{EXCEPTION_MANAGER}.last_exception.original.raise
{EXCEPTION_MANAGER}.last_exception.cause.raise
{EXCEPTION_MANAGER}.last_exception.raise

第一个经历异常链，忽略那些因例程失败而触发的异常。可能就是您要找的那个。

接下来的两个检索当前异常的原因或当前异常本身，尽管它可能不是您要查找的那个，因为它取决于异常的上下文和嵌套调用。

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