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In this Spring AOP example, we will learn to use AspectJ @AfterReturning annotation in Spring-based applications. AfterReturning advice methods annotated with a @AfterReturning annotation that will execute after a join point completes normally, meaning that the target method returns normally without throwing an exception.

In this example, We will create a simple spring boot application, add logging aspect and then invoke aspect methods based on pointcuts information passed in a @AfterReturning annotation.

AspectJ @AfterReturning Annotation Quick Example

Below snippet shows usage of @AfterReturning annotation:

@Aspect
@Component
public class LoggingAspect {

    private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());

    @AfterReturning("execution(* net.guides.springboot2.springaop.service.EmployeeService.*(..))")
    public void logAfterReturningAllMethods() throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningAllMethods() ");
    }

    @AfterReturning(pointcut = "execution(* net.guides.springboot2.springaop.service.EmployeeService.getEmployeeById(..))", returning = "retVal")
    public void logAfterReturningGetEmployee(Object retVal) throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningGetEmployee() ");
    }

    @AfterReturning("execution(* net.guides.springboot2.springaop.service.EmployeeService.addEmployee(..))")
    public void logAfterReturningAddEmployee() throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningAddEmployee() ");
    }
}

Let's demonstrate the usage of @AfterReturning annotation with a complete step by step example.

1. Creating a Spring Boot Application

There are many ways to create a Spring Boot application. You can refer below articles to create a Spring Boot application.

>> Create Spring Boot Project With Spring Initializer
>> Create Spring Boot Project in Spring Tool Suite [STS]

Refer next step to create project packaging structure.

Maven Dependencies

<?xml version="1.0" encoding="UTF-8"?>
<project
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>net.guides.springboot2</groupId>
    <artifactId>springboot2-springaop-example</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>springboot2-springaop-example</name>
    <description>Demo project for Spring Boot</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.0.4</version>
        <relativePath />
        <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Project Structure

Below project structure for your reference -

Create an Aspect - LogginAspect.java

@Aspect
@Component
public class LoggingAspect {

    private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());

    @AfterReturning("execution(* net.guides.springboot2.springaop.service.EmployeeService.*(..))")
    public void logAfterReturningAllMethods() throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningAllMethods() ");
    }

    @AfterReturning(pointcut = "execution(* net.guides.springboot2.springaop.service.EmployeeService.getEmployeeById(..))", returning = "retVal")
    public void logAfterReturningGetEmployee(Object retVal) throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningGetEmployee() ");
    }

    @AfterReturning("execution(* net.guides.springboot2.springaop.service.EmployeeService.addEmployee(..))")
    public void logAfterReturningAddEmployee() throws Throwable {
        LOGGER.debug("****LoggingAspect.logAfterReturningAddEmployee() ");
    }
}

Create a Java POJO - Employee.java

package net.guides.springboot2.springaop.model;

public class Employee {

 private long id;
 private String firstName;
 private String lastName;
 private String emailId;
 
 public Employee() {
  
 }
 
 public Employee(long id, String firstName, String lastName, String emailId) {
  this.id = id;
  this.firstName = firstName;
  this.lastName = lastName;
  this.emailId = emailId;
 }
 
 public long getId() {
  return id;
 }
 public void setId(long id) {
  this.id = id;
 }
 
 public String getFirstName() {
  return firstName;
 }
 public void setFirstName(String firstName) {
  this.firstName = firstName;
 }
 
 public String getLastName() {
  return lastName;
 }
 public void setLastName(String lastName) {
  this.lastName = lastName;
 }
 
 public String getEmailId() {
  return emailId;
 }
 public void setEmailId(String emailId) {
  this.emailId = emailId;
 }

 @Override
 public String toString() {
  return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", emailId=" + emailId
    + "]";
 } 
}

Create service methods - EmployeeService.java

Let's create a few service methods for Employee on which aspects need to be executed.

package net.guides.springboot2.springaop.service;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Service;

import net.guides.springboot2.springaop.model.Employee;

/**
 * Employee Service
 * 
 * @author Ramesh
 *
 */
@Service
public class EmployeeService {

    private List < Employee > employees = new ArrayList < > ();

    public List < Employee > getAllEmployees() {
        System.out.println("Method getAllEmployees() called");
        return employees;
    }

    public Employee getEmployeeById(Long employeeId) {
        System.out.println("Method getEmployeeById() called");
        for (Employee employee: employees) {
            if (employee.getId() == Long.valueOf(employeeId)) {
                return employee;
            }
        }
        return null;
    }

    public void addEmployee(Employee employee) {
        System.out.println("Method addEmployee() called");
        employees.add(employee);
    }

    public void updateEmployee(Employee employeeDetails) {
        System.out.println("Method updateEmployee() called");
        for (Employee employee: employees) {
            if (employee.getId() == Long.valueOf(employeeDetails.getId())) {
                employees.remove(employee);
                employees.add(employeeDetails);
            }
        }
    }

    public void deleteEmployee(Long employeeId) {
        System.out.println("Method deleteEmployee() called");
        for (Employee employee: employees) {
            if (employee.getId() == Long.valueOf(employeeId)) {
                employees.remove(employee);
            }
        }
    }
}

Test Spring AspectJ Configuration and Execution

Now let’s test whether the above-configured aspects execute on given pointcut information using Spring boot Application:

package net.guides.springboot2.springaop;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;

import net.guides.springboot2.springaop.model.Employee;
import net.guides.springboot2.springaop.service.EmployeeService;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        ApplicationContext applicationContext = SpringApplication.run(Application.class, args);
        EmployeeService employeeService = applicationContext.getBean(EmployeeService.class);
        employeeService.addEmployee(new Employee(100 L, "ramesh", "fadatare", "ramesh@gmail.com"));
        employeeService.getEmployeeById(100 L);
        employeeService.getAllEmployees();
    }
}

Output:

From the above diagram, it clears that aspect advice executed on relevant joinpoints.

To learn more about Spring AOP then check out the complete Spring AOP Tutorial.

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

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Search This Blog

Spring AOP AspectJ @AfterReturning Annotation Example

AspectJ @AfterReturning Annotation Quick Example

1. Creating a Spring Boot Application

Maven Dependencies

Project Structure

Create an Aspect - LogginAspect.java

Create a Java POJO - Employee.java

Create service methods - EmployeeService.java

Test Spring AspectJ Configuration and Execution

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

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ChatGPT for Java Developers: Boost Your Productivity with AI

Comments

Post a Comment

Spring Boot 3 Paid Course Published for Free
on my Java Guides YouTube Channel

Spring AOP AspectJ @AfterReturning Annotation Example

AspectJ @AfterReturning Annotation Quick Example

1. Creating a Spring Boot Application

Maven Dependencies

Project Structure

Create an Aspect - LogginAspect.java

Create a Java POJO - Employee.java

Create service methods - EmployeeService.java

Test Spring AspectJ Configuration and Execution

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

Build REST APIs with Spring Boot 4, Spring Security 7, and JWT

[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25

ChatGPT + Generative AI + Prompt Engineering for Beginners

Spring 7 and Spring Boot 4 for Beginners (Includes 8 Projects)

Building Real-Time REST APIs with Spring Boot - Blog App

Building Microservices with Spring Boot and Spring Cloud

Java Full-Stack Developer Course with Spring Boot and React JS

Build 5 Spring Boot Projects with Java: Line-by-Line Coding

Testing Spring Boot Application with JUnit and Mockito

Spring Boot Thymeleaf Real-Time Web Application - Blog App

Master Spring Data JPA with Hibernate

Spring Boot + Apache Kafka Course - The Practical Guide

Java Testing: Mastering JUnit 5 Framework

Reactive Programming in Java: Spring WebFlux and Testing

Spring Boot + RabbitMQ Course - The Practical Guide

Functional Programming in Java (Includes Java Collections)

ChatGPT for Java Developers: Boost Your Productivity with AI

Comments

Post a Comment

Spring Boot 3 Paid Course Published for Free on my Java Guides YouTube Channel

Spring Boot 3 Paid Course Published for Free
on my Java Guides YouTube Channel