33-Naming-Conventions-and-Custom-Advice-Annotations

                                @Pointcut("within(org.yash.watertechsol.model.*Service.(..))")

You can write advice using annotation also.

@Around("@annotation(org.yash.watertechsol.aspect.Loggable)")

Loggable.java (annotation class)

package org.yash.watertechsol.aspect;

public @interface Loggable {

}

ShapeService.java

      @Loggable  

      public Circle getCircle() {

            return circle;

      }

AopMain.java

package org.yash.watertechsol;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.yash.watertechsol.service.ShapeService;

public class AopMain {

      public static void main(String args[]){

            ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");

           

            ShapeService shapeService = ctx.getBean("shapeService", ShapeService.class);

            shapeService.getCircle();

      }

}

Loggable.java

package org.yash.watertechsol.aspect;

public @interface Loggable {

}

LoggingAspect.java

package org.yash.watertechsol.aspect;

import org.aspectj.lang.ProceedingJoinPoint;

import org.aspectj.lang.annotation.Around;

import org.aspectj.lang.annotation.Aspect;

@Aspect

public class LoggingAspect {

            @Around("@annotation(org.yash.watertechsol.aspect.Loggable)")

            public Object myAroundAdvice(ProceedingJoinPoint pjp){

                  Object returnValue = null;

                  try {

                        System.out.println("Before Advice");

                        returnValue = pjp.proceed();

                        System.out.println("After Returning");

                  } catch (Throwable e) {

                        System.out.println("AfterThrowing");

                  } // this is place where actual method execution happens

                  System.out.println("After Finally");

                  return returnValue;

            }

           

                       

}

ShapeService.java

package org.yash.watertechsol.service;

import org.yash.watertechsol.aspect.Loggable;

import org.yash.watertechsol.model.Circle;

import org.yash.watertechsol.model.Triangle;

public class ShapeService {

      private Triangle triangle;

      private Circle circle;

      @Loggable  

      public Circle getCircle() {

            return circle;

      }

     

      public void setCircle(Circle circle) {

            this.circle = circle;

      }

     

      public Triangle getTriangle() {

            return triangle;

      }

      public void setTriangle(Triangle triangle) {

            this.triangle = triangle;

      }    

}

Triangle.java

package org.yash.watertechsol.model;

public class Triangle {

      private String name;

      public void setName(String name) {

            this.name = name;

      }

      public String getName() {

            return name;

      }

}

Circle.java

package org.yash.watertechsol.model;

public class Circle {

      private String name;

      public String getName() {

            return name;

      }

      public void setName(String name) {

            this.name = name;

            System.out.println("Circle Setter is called");

            throw(new RuntimeException());           

      }

     

      public String setNameandReturn(String name) {

            this.name = name;

            System.out.println("Circle Setter is called");

            return name;

      }    

}

spring.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: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-2.0.xsd

                        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd

                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">

      <aop:aspectj-autoproxy />

      <bean id="triangle" class="org.yash.watertechsol.model.Triangle">

            <property name="name" value="Triangle Name"></property>

      </bean>

      <bean id="circle" class="org.yash.watertechsol.model.Circle">

           

      </bean>

      <bean id="shapeService" class="org.yash.watertechsol.service.ShapeService" autowire="byName"/>

      <bean id="loggingAspect" class="org.yash.watertechsol.aspect.LoggingAspect"/>

     

</beans>