proxy.java

proxy.java

package com.company;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class Main {

    static class Worker implements IWorker {
        public void doSomething() {
            System.out.println("doing something");
        }
    }

    public static void main(String[] args) {
        final Worker worker = new Worker();

        IWorker proxy = (IWorker) Proxy.newProxyInstance(Main.class.getClassLoader(), new Class[]{IWorker.class}, new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                System.out.println("-- open tx");
                try {
                    return method.invoke(worker, args);
                } finally {
                    System.out.println("-- close tx");
                }
            }

        });


        proxy.doSomething();

    }
}