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Discussion on: Spring Data — Power of Domain Events

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cezarcruz profile image
Cezar Cruz •

First time I see that, and looks amazing. There is some performance drawback?

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kirekov profile image
Semyon Kirekov •

@cezarcruz
These two approaches have approximately the same performance.

Though there might be a problem if you have too many listeners called on BEFORE_COMMIT phase. As long as they act synchronously, it can impact the transaction running time.

Anyway, it's not the end of the world. You can make your listeners run asynchronously

@Component
public class Listener {
    @TransactionalEventListener(phase = AFTER_COMMIT)
    @Async
    void captureEvent(SomeEvent event) {
        // do stuff
    }
}
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But not all listeners should be run asynchronously. For example, email sender is a perfect candidate. Whilst the one that stores archive records is not.