JAVA EE: Spring AOP AspectJ @Before Annotation Example [Apply to multiple methods]

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Spring AOP AspectJ @Before Annotation Example [Apply to multiple methods] | Spring Tutorial

pom.xml

<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ram.core</groupId>

    <artifactId>SpringDemo</artifactId>

    <packaging>jar</packaging>

    <version>1.0-SNAPSHOT</version>

    <name>SpringDemo</name>

    <url>http://maven.apache.org</url>

    <properties>

        <spring.version>5.0.5.RELEASE</spring.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>3.8.1</version>

            <scope>test</scope>

        </dependency>

        <!-- Spring 5 dependencies -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <!-- Spring AOP + AspectJ -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-aop</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjrt</artifactId>

            <version>1.9.1</version>

        </dependency>

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjweaver</artifactId>

            <version>1.9.1</version>

        </dependency>

    </dependencies>

</project>

EmployeeService.java

package com.ram.service;

public class EmployeeService

{

    public void addEmployee()

    {

        System.out.println("addEmployee() method is called \n");

    }

    public void addEmployee(String name, int age)

    {

        System.out.println(

                "addEmployee(String name, int age) method is called \n");

    }

    public void modifyEmployee()

    {

        System.out.println("modifyEmployee() method is called \n ");

    }

    public void deleteEmployee()

    {

        System.out.println("deleteEmployee() method is called \n ");

    }

}

LoggingAspect.java

package com.ram.Aspect;

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;

@Aspect

public class LoggingAspect

{

    @Before("execution(* com.ram.service.EmployeeService.*Employee(..))")

    public void logBefore(JoinPoint joinPoint)

    {

        System.out.print("logBefore() is running!");

        System.out.println(", before "

                + joinPoint.getSignature().getName() + " method");

    }

}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:aop="http://www.springframework.org/schema/aop"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-4.3.xsd

    http://www.springframework.org/schema/aop 

    http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">

    <aop:aspectj-autoproxy />

    <bean id="employeeService" class="com.ram.service.EmployeeService"></bean>

    <!-- Aspect -->

    <bean id="logAspect" class="com.ram.Aspect.LoggingAspect" />

</beans>

App.java

package com.ram.core;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.service.EmployeeService;

public class App

{

    public static void main(String[] args)

    {

        ApplicationContext context = new ClassPathXmlApplicationContext(

                "applicationContext.xml");

        System.out.println("---------------------------------------");

        EmployeeService employeeService = context

                .getBean("employeeService", EmployeeService.class);

        employeeService.addEmployee();

        employeeService.addEmployee("Peter", 45);

        employeeService.modifyEmployee();

        employeeService.deleteEmployee();

    }

}

Output

Nov 03, 2018 10:47:42 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh

INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@4bf558aa: startup date [Sat Nov 03 10:47:42 IST 2018]; root of context hierarchy

Nov 03, 2018 10:47:42 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

INFO: Loading XML bean definitions from class path resource [applicationContext.xml]

---------------------------------------

logBefore() is running!, before addEmployee method

addEmployee() method is called

logBefore() is running!, before addEmployee method

addEmployee(String name, int age) method is called

logBefore() is running!, before modifyEmployee method

modifyEmployee() method is called

logBefore() is running!, before deleteEmployee method

deleteEmployee() method is called