Agent.java

Agent.java

import java.util.concurrent.CountDownLatch;

import sun.misc.Signal;

public class Agent {
    private final CountDownLatch shutdownLatch;

    public Agent() {
        this.shutdownLatch = new CountDownLatch(1);
    }

    public void run() throws InterruptedException {
        // Register a signal handler for Ctrl-C that runs the shutdown hooks
        Signal.handle(new Signal("INT"), sig -> System.exit(0));

        System.out.println("Running");

        // Add a shutdown hook
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            shutdown();
        }));

        try {
            shutdownLatch.await();
            System.out.println("Latch released");
        } catch (InterruptedException e) {
            System.out.println("InterruptedException");
        }
    }

    public synchronized void shutdown() {
        System.out.println("Shutdown called");
        shutdownLatch.countDown();
    }

    public static void main(String[] args) throws Exception {
        new Agent().run();
    }
}