gradle5

package bootstrap;

import sun.net.spi.nameservice.NameService;
import sun.net.spi.nameservice.NameServiceDescriptor;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class BootstrapServer {
    public static void main(String[] args) throws Exception {
        // --- Read hostname from JVM property ---
        String forcedHost = System.getProperty("forced.hostname", "egtpsga56.nam.nsroot.net");
        String forcedIP = System.getProperty("forced.ip", "10.167.188.246"); // optional IP override

        // --- Install custom NameService ---
        System.setProperty("sun.net.spi.nameservice.provider.1", "dns,fake");
        System.setProperty("sun.net.spi.nameservice.provider.2", "default");

        // Set static fields in FakeNameService for bootstrap
        FakeNameService.forcedHost = forcedHost;
        FakeNameService.forcedIP = forcedIP;

        // --- Delegate to real external main class ---
        com.citigroup.get.quantum.server.Server.main(args);
    }

    // --- Custom NameService ---
    public static class FakeNameService implements NameService {
        static String forcedHost;
        static String forcedIP;

        @Override
        public InetAddress[] lookupAllHostAddr(String host) throws UnknownHostException {
            if (host.equalsIgnoreCase(InetAddress.getLocalHost().getHostName()) || host.equalsIgnoreCase("localhost")) {
                return new InetAddress[]{InetAddress.getByName(forcedIP)};
            }
            return InetAddress.getAllByName(host);
        }

        @Override
        public String getHostByAddr(byte[] addr) throws UnknownHostException {
            return forcedHost;
        }
    }

    // --- NameServiceDescriptor required by JVM ---
    public static class FakeNameServiceDescriptor implements NameServiceDescriptor {
        @Override
        public NameService createNameService() {
            return new FakeNameService();
        }

        @Override
        public String getProviderName() { return "fake"; }

        @Override
        public String getType() { return "dns"; }
    }
}


==============

  jvmArgs(
        "-Dforced.hostname=egtpsga56.nam.nsroot.net",
        "-Dforced.ip=10.167.188.246",

    )