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Automatically register a Quarkus app with a custom hostname.local via mDNS
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| //usr/bin/env jbang "$0" "$@" ; exit $? | |
| //DEPS io.quarkus.platform:quarkus-bom:3.14.2@pom | |
| //DEPS io.quarkus:quarkus-rest | |
| //DEPS org.jmdns:jmdns:3.5.12 | |
| //COMPILE_OPTIONS -parameters | |
| //RUNTIME_OPTIONS -Djava.util.logging.manager=org.jboss.logmanager.LogManager -Dmdns.host=awesome | |
| import java.io.IOException; | |
| import java.net.InetAddress; | |
| import javax.jmdns.JmDNS; | |
| import javax.jmdns.ServiceInfo; | |
| import org.eclipse.microprofile.config.inject.ConfigProperty; | |
| import org.jboss.logging.Logger; | |
| import io.quarkus.runtime.Quarkus; | |
| import io.quarkus.runtime.ShutdownEvent; | |
| import io.quarkus.runtime.StartupEvent; | |
| import jakarta.enterprise.context.ApplicationScoped; | |
| import jakarta.enterprise.event.Observes; | |
| import jakarta.inject.Inject; | |
| import jakarta.ws.rs.GET; | |
| import jakarta.ws.rs.Path; | |
| import jakarta.ws.rs.Produces; | |
| import jakarta.ws.rs.core.MediaType; | |
| @Path("/hello") | |
| @ApplicationScoped | |
| public class qmdns { | |
| private static final Logger LOGGER = Logger.getLogger(qmdns.class); | |
| @GET | |
| public String sayHello() { | |
| return "hello there!"; | |
| } | |
| public static void main(String[] args) { | |
| Quarkus.run(args); | |
| } | |
| @Inject | |
| GreetingService service; | |
| @GET | |
| @Produces(MediaType.TEXT_PLAIN) | |
| @Path("/greeting/{name}") | |
| public String greeting(String name) { | |
| return service.greeting(name); | |
| } | |
| @ApplicationScoped | |
| static public class GreetingService { | |
| public String greeting(String name) { | |
| return "Salut " + name + "!"; | |
| } | |
| } | |
| /** | |
| * Automatically register this application via mDNS for easy discovery, e.g. | |
| * ping | |
| */ | |
| @ApplicationScoped | |
| static public class AutoDNS { | |
| private JmDNS jmdns; | |
| @ConfigProperty(name = "quarkus.http.port") | |
| int quarkusPort; | |
| @ConfigProperty(name = "mdns.host") | |
| String mdnsHost; | |
| public void onStart(@Observes StartupEvent startup) { | |
| //TODO check active profile to restrict mDNS registration to dev mode | |
| var hostName = mdnsHost+".local"; | |
| try { | |
| jmdns = JmDNS.create(InetAddress.getLocalHost(), mdnsHost); | |
| // Register a service | |
| LOGGER.infof("Registering mDNS service %s",hostName); | |
| ServiceInfo serviceInfo = ServiceInfo.create("_http._tcp.local.", mdnsHost, quarkusPort, 0, 0, mdnsHost); | |
| jmdns.registerService(serviceInfo); | |
| LOGGER.infof("The application is available from http://%s:%d/", hostName, quarkusPort); | |
| } catch (IOException e) { | |
| LOGGER.errorf(e, "Failed to register mDNS service %s", hostName); | |
| } | |
| } | |
| public void onStop(@Observes ShutdownEvent shutdown) { | |
| LOGGER.info("The application is stopping..."); | |
| if (jmdns != null) { | |
| LOGGER.info("Unregistering mDNS services..."); | |
| jmdns.unregisterAllServices(); | |
| jmdns = null; | |
| } | |
| } | |
| } | |
| } |
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