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

Click here to watch on Youtube:
https://www.youtube.com/watch?v=yXAkHLQcsnM&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge:

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

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

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

Click the below link to download the code:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_AspectJ_before_all_methods.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_AspectJ_before_all_methods

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/a5cdfdc3da3c676ee6dec77cfdb6b5c635be29d3/Spring_2018/SpringDemo_AspectJ_before_all_methods/?at=master

See also:

All JavaEE Videos Playlist

All JavaEE Videos

All JAVA EE Links

Spring Tutorial

Servlets Tutorial

All Design Patterns Links

JDBC Tutorial

Java Collection Framework Tutorial

JAVA Tutorial

Kids Tutorial

Cooking Tutorial