java - 如何处理执行许多不同背景更改的外观方法的错误？

Question

假设我有一个如下所示的服务:

public interface MyAccountService
{
    boolean create( String user );
}

create 方法执行了一些更改，即(为了讨论):

1. 将消息添加到队列中
2. 将一行添加到多个表中
3. 创建 LDAP 帐户等...

目前，我将所有错误消息折叠为单个 boolean 返回值。现在，如果在内部出现错误，我将为支持团队记录这些错误。

例如用户创建失败的典型日志

按照以下(严格)顺序创建“alistair”帐户:

• 添加到表 Foo:成功
• 添加到表格栏:成功
• 添加到 LDAP:失败
• 添加到队列:成功

这样，技术支持人员就可以决定如何修复帐户。

设计系统的最佳实践是什么，以便我们可以轻松跟踪交易的成功/失败(并手动修复)？正在返回 boolean 值并吞掉所有异常是一个好的设计吗？

编辑:通过吞咽异常，我的意思是不将它们扔给调用者。不过，我确实记录了异常，并将它们转换为 false/true 返回值。

Answer 1

我喜欢文章presented here中描述的方法，有相关讨论here ...

这个想法是考虑异常类型，并以不同的方式处理它们:

One type of exception is a contingency, which means that a process was executed that cannot succeed because of a known problem (the example he uses is that of a checking account, where the account has insufficient funds, or a check has a stop payment issued.) These problems should be handled by way of a distinct mechanism, and the code should expect to manage them.

The other type of exception is a fault, such as the IOException. A fault is typically not something that is or should be expected, and therefore handling faults should probably not be part of a normal process.