Source Code : Hello World With Pointcut

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Hello World With Pointcut

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


///////////////////////////////////////////////////////////////////////////////////////
public interface IMessageWriter {

    public void writeMessage();
}


///////////////////////////////////////////////////////////////////////////////////////
public class MessageWriter implements IMessageWriter{

    public void writeMessage() {
        System.out.print("World");
    }

}

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

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.aop.framework.ProxyFactory;

public class SimpleBeforeAdvice implements MethodBeforeAdvice {

    public void before(Method method, Object[] args, Object target)
            throws Throwable {
        System.out.println("Before method: " + method.getName());
    }

}

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

public class ErrorBean {

    public void errorProneMethod() throws Exception {
        throw new Exception("Foo");
    }

    public void otherErrorProneMethod() throws IllegalArgumentException {
        throw new IllegalArgumentException("Bar");
    }
}
///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;

public class HelloWorldWithPointcut {

    public static void main(String[] args) {

        // get proxy
        ProxyFactory pf = new ProxyFactory();
        pf.addAdvisor(new DefaultPointcutAdvisor(new SimpleBeforeAdvice()));
        
        pf.setTarget(new MessageWriter());
        MessageWriter proxy1 = (MessageWriter)pf.getProxy();
        
        pf.setTarget(new MessageWriter());
        MessageWriter proxy2 = (MessageWriter)pf.getProxy();
        proxy2.writeMessage();
        
        pf.setTarget(new ErrorBean());
        ErrorBean proxy3 = (ErrorBean)pf.getProxy();
        proxy3.hashCode();
        
    }
}           
       

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