vertx_worker_verticle.java

package com.github.leosilvadev.verticle;

import io.vertx.core.AbstractVerticle;
import io.vertx.core.DeploymentOptions;
import io.vertx.core.Vertx;

import java.util.concurrent.atomic.AtomicLong;

/**
 * Created by leonardo on 11/18/17.
 */
public class HelloVerticle extends AbstractVerticle {

    @Override
    public void start() throws Exception {
        final Long id = counter.incrementAndGet();
        System.out.println(String.format("Verticle number %s running! Worker thread: %s", id, Thread.currentThread().getName()));
        vertx.executeBlocking(future -> {
            System.out.println(String.format("Verticle number %s running executeBlocking! Worker thread: %s", id, Thread.currentThread().getName()));
            future.complete(true);
        }, (result) -> {});
    }

    public static final AtomicLong counter = new AtomicLong(0);

    public static void main(String[] args) throws InterruptedException {
        final Vertx vertx = Vertx.vertx();

        vertx.deployVerticle(HelloVerticle.class.getName());

        Thread.sleep(1000);
        System.out.println("\n");
        vertx.deployVerticle(HelloVerticle.class.getName(), new DeploymentOptions().setWorker(true).setInstances(10));

        Thread.sleep(1000);
        System.out.println("\n");
        vertx.deployVerticle(HelloVerticle.class.getName(), new DeploymentOptions().setWorker(true).setInstances(10).setWorkerPoolSize(100));

        Thread.sleep(1000);
        System.out.println("\n");
        vertx.deployVerticle(HelloVerticle.class.getName(), new DeploymentOptions().setWorker(true).setInstances(10).setWorkerPoolSize(100).setWorkerPoolName("newOne"));
    }

}

Could you please explain the code and concepts ?