Create AOP examples

- Use different types of advice
- Use various types of pointcut expressions

spring-mvc-java/src/main/java/org/baeldung/aop/PublishingAspect.java

@@ -0,0 +1,36 @@
+package org.baeldung.aop;
+
+import org.aspectj.lang.JoinPoint;
+import org.aspectj.lang.annotation.AfterReturning;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Pointcut;
+import org.baeldung.events.FooCreationEvent;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.stereotype.Component;
+
+@Component
+@Aspect
+public class PublishingAspect {
+
+    private ApplicationEventPublisher eventPublisher;
+
+    @Autowired
+    public void setEventPublisher(ApplicationEventPublisher eventPublisher) {
+        this.eventPublisher = eventPublisher;
+    }
+
+    @Pointcut("@target(org.springframework.stereotype.Repository)")
+    public void repositoryMethods() {}
+
+    @Pointcut("execution(* *..create*(Long,..))")
+    public void firstLongParamMethods() {}
+
+    @Pointcut("repositoryMethods() && firstLongParamMethods()")
+    public void entityCreationMethods() {}
+
+    @AfterReturning(value = "entityCreationMethods()", returning = "entity")
+    public void logMethodCall(JoinPoint jp, Object entity) throws Throwable {
+        eventPublisher.publishEvent(new FooCreationEvent(entity));
+    }
+}