Вопросы к собеседованию 2 уровень

public class ListProxy implements InvocationHandler {

    private List<Object> target;

    public ListProxy(List<Object> target) {
        this.target = target;
    }

    public static void main(String[] args) {
        List<Object> list = new ArrayList<>();
        List<Object> proxy = (List<Object>) Proxy.newProxyInstance(
                List.class.getClassLoader(),
                new Class<?>[] { List.class },
                new ListProxy(list)
        );
        proxy.add("Hello");
        proxy.add("World");
        System.out.println(list);
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        System.out.println("Calling " + method.getName());
        return method.invoke(target, args);
    }

}

import java.io.Serializable;

public class Person implements Serializable {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

import java.rmi.Remote;
import java.rmi.RemoteException;
import java.io.Serializable;

public interface Person extends Remote, Serializable {
    String getName() throws RemoteException;
    int getAge() throws RemoteException;
}

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

public class Server {
    public static void main(String[] args) {
        try {
            Person person = new PersonImpl("John Doe", 30);
            Person stub = (Person) UnicastRemoteObject.exportObject(person, 0);

            Registry registry = LocateRegistry.getRegistry();
            registry.bind("Person", stub);

            System.out.println("Server ready");
        } catch (Exception e) {
            System.err.println("Server exception: " + e.toString());
            e.printStackTrace();
        }
    }
}

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;

public class Client {
    public static void main(String[] args) {
        try {
            Registry registry = LocateRegistry.getRegistry();
            Person stub = (Person) registry.lookup("Person");

            System.out.println("Name: " + stub.getName());
            System.out.println("Age: " + stub.getAge());
        } catch (Exception e) {
            System.err.println("Client exception: " + e.toString());
            e.printStackTrace();
        }
    }
}