non async bungeecord ping passthrough (forced host) implementation

ListenerClass.java

import net.md_5.bungee.api.ProxyServer;
import net.md_5.bungee.api.event.ProxyPingEvent;
import net.md_5.bungee.api.plugin.Listener;
import net.md_5.bungee.event.EventHandler;
import net.md_5.bungee.event.EventPriority;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;

public class ListenerClass implements Listener {
    @EventHandler(priority = EventPriority.HIGHEST)
    public void onPing(ProxyPingEvent e) throws ExecutionException, InterruptedException {
        String hostName = e.getConnection().getVirtualHost().getHostName();
        String srvnm = Main.findSrvByHost(hostName); // custom mapping implementation for hostname -> servername
        System.out.println("someone's pinging "+hostName+" srvnm:"+srvnm);
        if (srvnm!=null) {
            CountDownLatch pingLatch = new CountDownLatch(1);
            ProxyServer.getInstance().getServers().get(srvnm).ping((resp, status) -> {
                if (resp!=null) { e.setResponse(resp); }
                pingLatch.countDown();
            });
            pingLatch.await();
        }
    }
}