Java log throwable only in debug mode

Question

I want make log with throwable only when log-level is under debug mode.

My way is

try {
    // ...
} catch (Exception e){
    if(logger.isDebugEnabled()){
        logger.warn("ERR Occurs", e);
    } else {
        logger.warn("ERR Occurs");
    }
}

But it is hard to change all my code and It is difficult to see the code at a glance

Is there any alternatives?

Answer 1

There is a simpler one line equivalent to your own:

logger.warn("ERR Occurs", logger.isDebugEnabled() ? e : null);

You might consider packaging the ternary operator as a simple static method logEx(e) if not wanting to override the logging class.

However: hiding exceptions is a bad idea - especially when not in debug mode, so you are better off with addressing the conditions causing the exception and leaving the logging as:

logger.warn("ERR Occurs", e);