void agones() {
    final ExecutorService gameServerWatcherExecutor =
      Executors.newSingleThreadExecutor();
    final ScheduledExecutorService healthCheckExecutor =
      Executors.newSingleThreadScheduledExecutor();
    final Agones agones = Agones.builder()
      // Address specification.
      // If not specified, localhost:9357 will be used.
      // All the following methods are creating a ManagedChannel with 'usePlaintext'
      // If you need to use SSL, you can use 'withChannel(ManagedChannel)' method.
      .withAddress("localhost", 9357)
      .withAddress("localhost") // 9357 
      .withAddress(9357) // localhost
      .withAddress() // localhost 9357
      .withTarget("localhost:9357")
      .withTarget() // localhost:9357
      .withChannel(ManagedChannelBuilder
        .forAddress("localhost", 9357)
        .usePlaintext()
        .build())
      .withChannel() // localhost:9357
      // Game server watcher executor specification.
      .withGameServerWatcherExecutor(gameServerWatcherExecutor)
      // Health checker executor specification.
      // Check you game server's health check threshold and
      // set the executor's delay and period accordingly.
      .withHealthCheck(
        /* delay */Duration.ofSeconds(1L),
        /* period */Duration.ofSeconds(2L)
      )
      .withHealthCheckerExecutor(healthCheckExecutor)
      .build();
  // Health checking.
  // Checks if the executor, delay and period are specified.
  if (agones.canHealthCheck()) {
    // Automatic health checking.
    // Uses the health checker executor and the specified delay and period.
    agones.startHealthChecking();
  }
  // Manual health checking.
  final StreamObserver<Empty> requester = agones.healthCheck();
  // onNext needs to be called continuously to keep the game server healthy.
  requester.onNext(Empty.getDefaultInstance());
  // Stopping the health checking.
  agones.stopHealthChecking();
  // Game server watching.
  // Checks if the executor is specified.
  if (agones.canWatchGameServer()) {
    agones.addGameServerWatcher(gameServer ->
      // This will be called when the game server is updated.
      System.out.println("Game server updated: " + gameServer));
  }
  agones.allocate();
  agones.shutdown();
}