如何正确调试 Spring 事件？

Question

i'm starting to use Spring Events (using custom events and @EventListener annotation). One of my co-worker asked me if it wouldn't be good to add a log line in the @EventListener method. So i started to look if there were any "good practices" to debugging Spring Event instead of adding log lines everywhere. Kind of a generic way to know which and when events were send and which listener treated them.

Put in simple terms: How to properly trace and debug Spring Event usages?

Could not find any blog, article or StackOverflow discussion on the subject. Could someone point me in the right direction?

Thank you !

Answer 1

• You can create another logging event listener that listens for the events you specify and logs.

  @Component
  public class LoggingEventListener {
  
    @EventListener(classes=...)
    public void logEvent(ApplicationEvent event) {
        ...
    }
  }

• Or you can write log aspect based on the @EventListener annotation and it logs it.