Wednesday 14 November 2018

Spring AOP Example – Advice, Pointcut, Advisor - NameMatchMethodPointcut | Spring Tutorial


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Spring AOP Example – Advice, Pointcut, Advisor - NameMatchMethodPointcut | Spring Tutorial

Spring AOP Example – Advice, Pointcut, Advisor - NameMatchMethodPointcut | Spring Tutorial

Spring AOP Example – Advice, Pointcut, Advisor - NameMatchMethodPointcut | Spring Tutorial

Spring AOP Example – Advice, Pointcut, Advisor - NameMatchMethodPointcut | 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>
    </dependencies>
</project>

EmployeeService.java

package com.ram.service;

public class EmployeeService
{
    public String getEmployeeName()
    {
        System.out.println("Get Employee Name");
        return "Dave";
    }
   
    public int getEmployeeAge()
    {
        System.out.println("Get Employee Age");
        return 28;
    }
   
    public String getEmployeeAddress()
    {
        System.out.println("Get Employee Address");
        return "A111, East Street";
    }
}

AroundAdvice.java

package com.ram.Advice;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

public class AroundAdvice implements MethodInterceptor
{

    public Object invoke(MethodInvocation mi) throws Throwable
    {
        Object obj;
        System.out.println("AroundAdvice applied before actual method = "
                + mi.getMethod().getName());
        obj = mi.proceed();
        System.out.println("obj = " + obj);
        System.out.println("AroundAdvice applied after actual method =  "
                + mi.getMethod().getName());
        return obj;
    }

}

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"
    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">


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

    <bean id="employeeServiceProxy" class="org.springframework.aop.framework.ProxyFactoryBean">

        <property name="target" ref="employeeService"></property>
        <property name="interceptorNames">
            <list>
                <value>employeeAdvisor</value>
            </list>
        </property>
    </bean>

    <bean id="employeePointcut"
                class="org.springframework.aop.support.NameMatchMethodPointcut">
        <property name="mappedName" value="getEmployeeAge" />
    </bean>

    <bean id="employeeAdvisor"
                class="org.springframework.aop.support.DefaultPointcutAdvisor">
        <property name="pointcut" ref="employeePointcut" />
        <property name="advice" ref="aroundAdvice" />
    </bean>
   
</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("employeeServiceProxy", EmployeeService.class);

        employeeService.getEmployeeName();

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

        employeeService.getEmployeeAge();

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

        employeeService.getEmployeeAddress();
    }

}

Output

Oct 19, 2018 5:22:11 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@6ebc05a6: startup date [Fri Oct 19 17:22:11 IST 2018]; root of context hierarchy
Oct 19, 2018 5:22:11 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Get Employee Name
----------------------------------------
AroundAdvice applied before actual method = getEmployeeAge
Get Employee Age

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

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

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/f6c87f76a1833b5633bb135b038a4b624da36770/Spring_2018/SpringDemo_NameMatchMethodPointcut/?at=master

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