TransactionalEventListener

TransactionalEventListener is an annotation in Spring Framework that can be used to mark event listener methods to be executed within a transaction. This means that the event listener will participate in the ongoing transaction and will only be executed if the transaction completes successfully. If the transaction fails, the event listener method will not be executed.

This annotation can be used with any event listener method in Spring, including methods annotated with @EventListener or methods registered with Spring's ApplicationEventMulticaster. The transactional semantics of the event listener can be configured using the propagation, isolation, timeout, and read-only settings of the @Transactional annotation.

Example usage of TransactionalEventListener:

@TransactionalEventListener
public void handleUserRegisteredEvent(UserRegisteredEvent event) {
    // Process the event within a transaction
}

In this example, the handleUserRegisteredEvent method is marked with the TransactionalEventListener annotation, which means that it will execute within a transaction. If the transaction fails, the method will not be executed. This can be useful for ensuring data consistency when processing events that modify the database.