Source Code : Static Pointcut Example

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Static Pointcut Example

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/



///////////////////////////////////////////////////////////////////////////////////////
public class BeanOne {

    public void foo() {
        System.out.println("foo");
    }
    
    public void bar() {
        System.out.println("bar");
    }
}



///////////////////////////////////////////////////////////////////////////////////////

public class BeanTwo {

    public void foo() {
        System.out.println("foo");
    }
    
    public void bar() {
        System.out.println("bar");
    }
}


///////////////////////////////////////////////////////////////////////////////////////

import java.lang.reflect.Method;

import org.springframework.aop.ClassFilter;
import org.springframework.aop.support.StaticMethodMatcherPointcut;

public class SimpleStaticPointcut extends StaticMethodMatcherPointcut {

    public boolean matches(Method method, Class cls) {
        return ("foo".equals(method.getName()));
    }

    public ClassFilter getClassFilter() {
        return new ClassFilter() {
            public boolean matches(Class cls) {
                return (cls == BeanOne.class);
            }
        };

    }
}

///////////////////////////////////////////////////////////////////////////////////////

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

public class SimpleAdvice implements MethodInterceptor {

    public Object invoke(MethodInvocation invocation) throws Throwable {
        System.out.println(">> Invoking " + invocation.getMethod().getName());
        Object retVal = invocation.proceed();
        System.out.println(">> Done");
        return retVal;
    }

}

///////////////////////////////////////////////////////////////////////////////////////


import org.aopalliance.aop.Advice;
import org.springframework.aop.Advisor;
import org.springframework.aop.Pointcut;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;

public class StaticPointcutExample {

    public static void main(String[] args) {
        BeanOne one = new BeanOne();
        BeanTwo two = new BeanTwo();
        
        BeanOne proxyOne;
        BeanTwo proxyTwo;
        
        // create pointcut, advice and advisor
        Pointcut pc = new SimpleStaticPointcut();
        Advice advice = new SimpleAdvice();
        Advisor advisor = new DefaultPointcutAdvisor(pc, advice);
        
        // create BeanOne proxy
        ProxyFactory pf = new ProxyFactory();
        pf.addAdvisor(advisor);
        pf.setTarget(one);
        proxyOne = (BeanOne)pf.getProxy();
        
        // create BeanTwo proxy
        pf = new ProxyFactory();
        pf.addAdvisor(advisor);
        pf.setTarget(two);
        proxyTwo = (BeanTwo)pf.getProxy();
        
        proxyOne.foo();
        proxyTwo.foo();
        
        proxyOne.bar();
        proxyTwo.bar();
        
    }
}

           
       

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