#Before Advice Annotation not Applied in the Spring Application - spring

Question

I have been trying to develop a small application that demonstrates the #Before Annotation , but its not working
pom.xml
<?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>aopdemo</groupId>
<artifactId>aopdemo</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.11</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.0</version>
</dependency>
</dependencies>
AccoutDAO.java file is
package org.java.aop.dao;
import org.springframework.stereotype.Component;
#Component
public class AccoutDAO {
public void addAccount()
{
System.out.println("Adding account"+getClass());
}
}
The Aspect configuration file is
package org.java.aop.aspects;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
#Aspect
#Component
public class MyAspects {
#Before("execution(public void addAccount())")
public void display()
{
System.out.println("=====================>>CALLING Aspects");
}
}
The spring config file(spring-config.xml) is
<?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:mvc="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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="accountDAO" class="org.java.aop.dao.AccoutDAO">
</bean>
<aop:aspectj-autoproxy/>
</beans>
And finally my main code is
package org.java.aop;
import org.java.aop.dao.AccoutDAO;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MainDemo {
public static void main(String arg[])
{
try
{
ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("spring-config.xml");
AccoutDAO accoutDAO=context.getBean("accountDAO",AccoutDAO.class);
accoutDAO.addAccount();
context.close();
}
catch (Exception e)
{
System.out.print(e);
}
}
}
I am able to get the output as "INFO: Loading XML bean definitions from class path resource [spring-config.xml]
Adding accountclass org.java.aop.dao.AccoutDAO
Nov 22, 2018 2:06:14 AM org.springframework.context.support.AbstractApplicationContext doClose
INFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext#1ed6993a: startup date [Thu Nov 22 02:06:14 IST 2018]; root of context hierarchy"
But i could not able to get the output for #Before Annotation.Kindly tell me whats wrong in this code

Answer 1

The above problem is resolved by adding component scan in spring-config.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:mvc="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="accountDAO" class="org.java.aop.dao.AccoutDAO">
</bean>
<aop:aspectj-autoproxy/>
<context:component-scan base-package="org.java.aop"/>
</beans>