package dev.elaine.network;

import java.time.Duration;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public final class EventLoopOffloadSample {
    private EventLoopOffloadSample() {}

    public static String calculateOutsideEventLoop(String request) throws Exception {
        try (ExecutorService workers = Executors.newVirtualThreadPerTaskExecutor()) {
            Future<String> result = workers.submit(() -> {
                Thread.sleep(Duration.ofMillis(20));
                return request.toUpperCase();
            });
            return result.get();
        }
    }

    public static void main(String[] args) throws Exception {
        System.out.println(calculateOutsideEventLoop("slow-task"));
    }
}