eu.lucaventuri.examples.LatencyExample Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of fibry Show documentation

The first Java Actor System supporting fibers from Project Loom

There is a newer version: 3.0.1

package eu.lucaventuri.examples;

import eu.lucaventuri.common.Exceptions;
import eu.lucaventuri.common.SystemUtils;
import eu.lucaventuri.fibry.Actor;
import eu.lucaventuri.fibry.ActorSystem;
import eu.lucaventuri.fibry.ActorUtils;
import eu.lucaventuri.fibry.CreationStrategy;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

public class LatencyExample {
    public static void main(String[] args) {
        boolean threads = args.length == 1 && args[0].equals("threads");
        try (Actor actor = ActorSystem.anonymous().strategy(threads ? CreationStrategy.THREAD : CreationStrategy.AUTO).newActorWithReturn(n -> n + 1)) {
            System.out.println("Using " + (threads ? "threads" : "auto - Fibers available: " + ActorUtils.areFibersAvailable()));

            AtomicInteger result = new AtomicInteger();
            long ms = SystemUtils.time(() -> result.set(actor.sendMessageReturnWait(1, 0)));

            System.out.println(result + " computed in " + ms + " ms using an actor");

            long msThread = SystemUtils.time(() -> {
                CountDownLatch latch = new CountDownLatch(1);

                new Thread(() -> {
                    result.set(100);
                    latch.countDown();
                }).start();

                Exceptions.silence(latch::await);
            });
            long msNone = SystemUtils.time(() -> {});

            System.out.println(result + " computed in " + msThread + " ms using a thread");
        }
    }
}