App.java

public class App {
    private static Consul consul;
    private static final String SERVICE_ID = "ping-pong-1-id";

    public static void main(String[] args) {
        port(8000);
        consul = Consul.builder().withHostAndPort(HostAndPort.fromParts(System.getenv("host"), 8500))
                .build();
        AgentClient agentClient = consul.agentClient();
        registerOnConsul(agentClient);
        get("/ping", (req, res) -> "{\"message\":\"Pong\"}", Object::toString);
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            agentClient.deregister(SERVICE_ID);
        }));
    }

    private static void registerOnConsul(AgentClient agentClient) {
        Registration service = ImmutableRegistration.builder()
                .id(SERVICE_ID)
                .name("ping-pong-1")
                .port(8000)
                .build();
        agentClient.register(service);
    }
}