DaytimeServer.java

package org.arquillian.cube.impl.containerless;

import io.undertow.Undertow;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.Headers;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DaytimeServer {

    public static void main(String[] args) {

        Undertow server = Undertow.builder()
            .addHttpListener(8080, "0.0.0.0")
            .setHandler(new HttpHandler() {
                @Override
                public void handleRequest(final HttpServerExchange exchange) throws Exception {
                    SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
                    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
                    exchange.getResponseSender().send(simpleDateFormat.format(new Date()) + System.lineSeparator());
                }
            }).build();
        server.start();
    }
}