Question

I created a CustomExceptionClass that its messages are from a configuration file and are a friendlier message to the user.

Then I want to log wich exception was thrown because, if something went wrong, I want to know details then I can fix this. So, I have a doubt.

Where to log these exceptions using log4j? Inside the CustomExceptionClass, or I let the method that throws this exception log it?

Answer 1

You should log wherever you are catching the Exception. If you are not catching it anywhere it really depends how you are running your application.

Answer 2

我不敢肯定,你是否特别对原木4j有问题,但APIC只是需要一些东西来打log.eror(Object,Throwable),将电文作为第一个参数传递,并将错误作为第二个参数。

Regarding the question of where to call log.error, do not call log.error from within your CustomExceptionClass subclass of Throwable. Instead, I d make the decision as follows:

If you want to log details about exactly what happened, but you don t plan to put those details into your subclass of Exception, then log the details before throwing the error.

同样,如果你想要做一些具体的事情,无论是否或如何抓住例外,那么显然在放弃例外之前需要这样做。你对谁使用非私人方法的控制相对较少。

否则,在捕获区就会出现记录。这使你能够跟踪所发生情况以及你的申请如何反应。如果你只掌握了第一件资料,那么其他人就必须阅读该守则,以了解“什么?”

最后,它认为,在一切透镜中使用非专业例外处理器是一种良好做法。详情见Thread. UncaultExceptionHandler。基本上,你确实希望至少记录长期申请的所有例外。

Answer 3

您应将其登录在错误处理代码中,而不是最初产生错误之处。

Answer 4

在习俗例外情况下,我通常超负荷工作,只能正常工作。

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