Aspect Hello World Example

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Feedback Request New QnA Print Email

public interface IMessageWriter { public void writeMessage(); } /////////////////////////////////////////////////////////////////////////////////////// public class MessageWriter implements IMessageWriter{ public void writeMessage() { System.out.print("World"); } } /////////////////////////////////////////////////////////////////////////////////////// import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; public class MessageDecorator implements MethodInterceptor { public Object invoke(MethodInvocation invocation) throws Throwable { System.out.print("Hello "); Object retVal = invocation.proceed(); System.out.println("!"); return retVal; } } /////////////////////////////////////////////////////////////////////////////////////// import org.springframework.aop.framework.ProxyFactory; public class HelloWorldAOPExample { public static void main(String[] args) { MessageWriter target = new MessageWriter(); // create the proxy ProxyFactory pf = new ProxyFactory(); pf.addAdvice(new MessageDecorator()); pf.setTarget(target); MessageWriter proxy = (MessageWriter) pf.getProxy(); // write the messages target.writeMessage(); System.out.println(""); proxy.writeMessage(); } }

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Feedback Request New QnA Print Email

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