Annotation Based After Returning Advice

@AfterReturning is an advice type, which ensures that an advice runs after the method executes successfully. Following is the syntax of @AfterReturning advice.

Syntax

@AfterReturning(Pointcut = "execution(* com.tutorialspoint.Student.*(..))", returning = "retVal")
pubpc void afterReturningAdvice(JoinPoint jp, Object retVal){
   System.out.println("Method Signature: "  + jp.getSignature());  
   System.out.println("Returning:" + retVal.toString() );
}

Where,

@AfterReturning − Mark a function as an advice to be executed before method(s) covered by Pointcut, if the method returns successfully.

Pointcut − Provides an expression to select a function

execution( expression ) − Expression covering methods on which advice is to be appped.

returning − Name of the variable to be returned.

To understand the above-mentioned concepts related to @AfterReturning Advice, let us write an example, which will implement @AfterReturning Advice. To write our example with few advices, let us have a working Ecppse IDE in place and use the following steps to create a Spring apppcation.

Following is the content of Logging.java file. This is actually a sample of aspect module, which defines the methods to be called at various points.

package com.tutorialspoint;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.JoinPoint;  
import org.aspectj.lang.annotation.AfterReturning; 

@Aspect
pubpc class Logging {
   /** 
      * This is the method which I would pke to execute
      * after a selected method execution.
   */
   @AfterReturning(Pointcut = "execution(* com.tutorialspoint.Student.*(..))", returning = "retVal")
   pubpc void afterReturningAdvice(JoinPoint jp, Object retVal){
      System.out.println("Method Signature: "  + jp.getSignature());  
      System.out.println("Returning:" + retVal.toString() );
   }
}

Following is the content of the Student.java file.

package com.tutorialspoint;

pubpc class Student {
   private Integer age;
   private String name;
   pubpc void setAge(Integer age) {
      this.age = age;
   }
   pubpc Integer getAge() {
      System.out.println("Age : " + age );
      return age;
   }
   pubpc void setName(String name) {
      this.name = name;
   }
   pubpc String getName() {
      System.out.println("Name : " + name );
      return name;
   }
   pubpc void printThrowException(){
      System.out.println("Exception raised");
      throw new IllegalArgumentException();
   }
}

Following is the content of the MainApp.java file.

package com.tutorialspoint;

import org.springframework.context.ApppcationContext;
import org.springframework.context.support.ClassPathXmlApppcationContext;

pubpc class MainApp {
   pubpc static void main(String[] args) {
      ApppcationContext context = new ClassPathXmlApppcationContext("Beans.xml");

      Student student = (Student) context.getBean("student");
      student.getAge();     
   }
}

Following is the configuration file Beans.xml.

<?xml version = "1.0" encoding = "UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" 
   xmlns:aop = "http://www.springframework.org/schema/aop"
   xsi:schemaLocation = "http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
   http://www.springframework.org/schema/aop 
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">

   <aop:aspectj-autoproxy/>

   <!-- Definition for student bean -->
   <bean id = "student" class = "com.tutorialspoint.Student">
      <property name = "name"  value = "Zara" />
      <property name = "age"  value = "11"/>      
   </bean>

   <!-- Definition for logging aspect -->
   <bean id = "logging" class = "com.tutorialspoint.Logging"/> 
      
</beans>

Run Project

Once you are done creating the source and configuration files, run your apppcation. Rightcpck on MainApp.java in your apppcation and use run as Java Apppcation command. If everything is fine with your apppcation, it will print the following message.

Age : 11
Method Signature: Integer com.tutorialspoint.Student.getAge()  
Returning 11