dineshonjava

JoinPoints and Advice Arguments

Spring JoinPoints and Advice Arguments

Join point: A point during the execution of a program, such as the execution of a method or the handling of an exception. In Spring AOP, a join point always represents a method execution. Join point information is available in advice bodies by declaring a parameter of type org.aspectj.lang.JoinPoint.
Popular Spring Tutorials
  1. Spring Tutorial
  2. Spring MVC Web Tutorial
  3. Spring Boot Tutorial
  4. Spring JDBC Tutorial
  5. Spring AOP Tutorial
  6. Spring Security Tutorial
We'll now learn about join points, and how we can use arguments in the advice methods to get information about join points.

package com.dineshonjava.sdnext.aop.tutorial.aspectJ;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.dineshonjava.sdnext.aop.tutorial.aspectJ.service.ShapeService;

public class AopTest {

    public static void main(String args[])
    {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        ShapeService service=context.getBean("shapeService",ShapeService.class);
        service.getCircle().setName("Dummy Circle");
        System.out.println(service.getCircle().getName());
    }
}
package com.dineshonjava.sdnext.aop.tutorial.aspectJ;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

import com.dineshonjava.sdnext.aop.tutorial.aspectJ.model.Circle;

@Aspect
public class LoggingAspect {
   
    @Before("allCircleMethods()")
    public void loggingAdvice(JoinPoint joinpoint)
    {
        System.out.println("Run Advice..... get method Executed");
        System.out.println(joinpoint.toString());
        Circle c=(Circle)joinpoint.getTarget();
        System.out.println(c.getName());
    }
   
//    @Before("args(name)")
//    public void allStringMethodArguments(String name){
//       
//        System.out.println("A setter method has been executed............"+name);
//    }
   
    @Before("args(String)")
    public void allStringMethodArguments(){
   
    System.out.println("A setter method has been executed............");
    }
      
    @Pointcut("within(com.venkat.Spring.Aop.model.*)")
    public void allCircleMethods(){}
  }

package com.dineshonjava.sdnext.aop.tutorial.aspectJ.model;

public class Circle {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package com.dineshonjava.sdnext.aop.tutorial.aspectJ.model;

public class Triangle {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package com.dineshonjava.sdnext.aop.tutorial.aspectJ.service;

import com.dineshonjava.sdnext.aop.tutorial.aspectJ.model.Circle;
import com.dineshonjava.sdnext.aop.tutorial.aspectJ.model.Triangle;

public class ShapeService {

    private Triangle triangle;
    private Circle circle;
    public Triangle getTriangle() {
        return triangle;
    }
    public void setTriangle(Triangle triangle) {
        this.triangle = triangle;
    }
    public Circle getCircle() {
        return circle;
    }
    public void setCircle(Circle circle) {
        this.circle = circle;
    }
}

<beans xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" 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 class="com.dineshonjava.sdnext.aop.tutorial.aspectJ.model.Triangle" name="triangle">
    <property name="name" value="triangle name">
    </property></bean>
    <bean class="com.dineshonjava.sdnext.aop.tutorial.aspectJ.model.Circle" name="circle">
    <property name="name" value="circle name">
    </property></bean>
    <bean class="com.dineshonjava.sdnext.aop.tutorial.aspectJ.service.ShapeService" name="shapeService">
    <property name="triangle" ref="triangle">
    <property name="circle" ref="circle">
    </property></property></bean>
    <bean class="com.dineshonjava.sdnext.aop.tutorial.aspectJ.Aspect.LoggingAspect" name="loggingAdvice">
</bean></aop:aspectj-autoproxy></beans>





No comments:

Post a Comment