BAEL-8130 Update article "Spring Events" (#18386)

* Create AnnotationDrivenEventListener.java

* Update AsynchronousSpringEventsConfig.java

* Update AnnotationDrivenEventListener.java

* Update AnnotationDrivenEventListener.java

Author: dvohra16

spring-core/src/main/java/com/baeldung/springevents/asynchronous/AnnotationDrivenEventListener.java

@@ -0,0 +1,27 @@
+package com.baeldung.springevents.asynchronous;
+
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.event.TransactionPhase;
+import org.springframework.transaction.event.TransactionalEventListener;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.scheduling.annotation.Async;
+import static org.springframework.transaction.annotation.Propagation.REQUIRES_NEW;
+import com.baeldung.springevents.synchronous.CustomSpringEvent;
+
+@Component
+public class AnnotationDrivenEventListener {
+
+    @EventListener
+    @Async
+    public void handleAsyncEvent(CustomSpringEvent event) {
+        System.out.println("Handle event asynchronously: " + event.getMessage());
+    }
+
+    @Async
+    @Transactional(propagation = REQUIRES_NEW)
+    @TransactionalEventListener
+    void handleCustom(CustomSpringEvent event) { 
+        /* … */ 
+    }
+}

spring-core/src/main/java/com/baeldung/springevents/asynchronous/AsynchronousSpringEventsConfig.java

@@ -6,7 +6,9 @@
 import org.springframework.context.event.ApplicationEventMulticaster;
 import org.springframework.context.event.SimpleApplicationEventMulticaster;
 import org.springframework.core.task.SimpleAsyncTaskExecutor;
+import org.springframework.scheduling.annotation.EnableAsync;
 
+@EnableAsync
 @Configuration
 @ComponentScan("com.baeldung.springevents.synchronous")
 public class AsynchronousSpringEventsConfig {