Around advice

[ranadheer]

hi ,
i am trying to implement Around advice. i am not getting my Aspects getting invoked. i am not using <aop:config> tag as i am only using Around advice type. is that correct?. the code follows
SampleAOP2.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"
	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">

	<bean id="Singer" class="SampleAOP2.Singer">
		<constructor-arg value="3" />
	</bean>

	<bean id="Juggler" class="SampleAOP2.Juggler">
		<constructor-arg value="5" />
	</bean>

	<bean id="Audience" class="SampleAOP2.Audience"></bean>

	<bean id="AudienceAroundAdvice"
		class="SampleAOP2.AudienceAroundAdvice">
		<property name="audience" ref="Audience" />
	</bean>

	<bean id="AudienceAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
		<property name="advice" ref="AudienceAroundAdvice" />
		<property name="pattern" value=".*perform" />
	</bean>


</beans>

Performer.java

package SampleAOP2;

public interface Performer {
void perform();
}

Juggler.java

package SampleAOP2;

public class Juggler implements Performer {
	private int beanBags;
	
	
	public Juggler() {
	}

	public Juggler(int beanBags) {
		this.beanBags = beanBags;
	
	}

	public void perform() {
		System.out.println("Juggler is Performing");
		System.out.println("Juggler is JUGGLING with  "+beanBags+"CREDITS");
	}

}

Singer.java

package SampleAOP2;

public class Singer implements Performer {
	private int beanBags;

	public Singer() {
	}

	public Singer(int beanBags) {
		this.beanBags = beanBags;
	}

	public void perform() {
		System.out.println("Singer is Performing");
		System.out.println("Singer is SINGING with  "+beanBags+"CREDITS");
	}
}

Audience.java

package SampleAOP2;

public class Audience {
	public Audience(){}
	public void takeSeats(){
		System.out.println("The Audience is taking their seats.");
	}
	
	public void turnOffCellPhones(){
		System.out.println("The Audience is turning off their cellphones ");
	}
	
	public void applaud(){
		System.out.println("CLAP CLAP CLAP");
	}
	
	public void demandRefund(){
		System.out.println("Boo !. We want our money back");
	}

}

AudienceAroundAdvice.java

package SampleAOP2;

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

public class AudienceAroundAdvice implements MethodInterceptor {

	private Audience audience;

	public Object invoke(MethodInvocation invocation) throws Throwable {

		try {
			audience.takeSeats();
			audience.turnOffCellPhones();
			Object returnValue = invocation.proceed();
			audience.applaud();
			return returnValue;
		} catch (Exception ex) {
			audience.demandRefund();
			throw ex;
		}

	}

	public void setAudience(Audience audience) {
		this.audience = audience;
	}

}

MainClass.java

package SampleAOP2;

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

import SampleAOP2.Juggler;
import SampleAOP2.Singer;

public class MainClass {

	public static void main(String[] args) {
		ApplicationContext AC = new ClassPathXmlApplicationContext(
				"SampleAOP2.xml");
	
		Performer performerOBJ = (Performer) AC.getBean("Singer");
		performerOBJ.perform();
		performerOBJ = (Performer) AC.getBean("Juggler");
		performerOBJ.perform();
	}

}

i am using MainClass.java to debug/run the application

[ranadheer]

some body please check my way to use Around Advice and Correct me

[Andrei Stefan]

You defined in your example the behavior you want applied (around advice), where to apply it (.*perform), but there is no entity that creates those advised elements.
Please, check the reference documentation (http://static.springframework.org/sp...e/aop-api.html).

In your case you can add, for example:

<bean id="autoProxyCreator" class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />