version1.java

public class SimpleTest {

  @Test
  public void testIt() throws MalformedURLException, InterruptedException, ExecutionException, TimeoutException {
    String exe = "C:\\tools\\server.exe";
    CommandLine process = new CommandLine(exe, "--port=4545");
    process.copyOutputTo(System.out);
    process.executeAsync();
    System.out.println("waitUntilAvailable " + waitUntilAvailable(process));

    Thread.sleep(30000);
  }

  private boolean waitUntilAvailable(CommandLine process) throws MalformedURLException, InterruptedException, ExecutionException, TimeoutException {
    URL statusUrl = new URL("http://localhost:4545/status");
    CompletableFuture<Boolean> serverStarted = CompletableFuture.supplyAsync(() -> {
      try {
        new UrlChecker().waitUntilAvailable(10000, TimeUnit.MILLISECONDS, statusUrl);
        System.out.println("serverStarted return");
        return true;
      } catch (UrlChecker.TimeoutException e) {
        System.out.println("serverStarted timeout");
        throw new WebDriverException("Timed out waiting for driver server to start.", e);
      }
    });

    CompletableFuture<Boolean> processFinished = CompletableFuture.supplyAsync(() -> {
      process.waitFor(10000);
      System.out.println("processFinished return");
      return false;
    });

    boolean result = (Boolean) CompletableFuture.anyOf(serverStarted, processFinished).get(20, TimeUnit.SECONDS);
    if (result) {
      processFinished.cancel(true);
    } else {
      serverStarted.cancel(true);
    }
    return result;
  }
}

version2.java

public class SimpleTest {

  @Test
  public void testIt() throws MalformedURLException, InterruptedException, ExecutionException, TimeoutException {
    String exe = "C:\\tools\\server.exe";
    CommandLine process = new CommandLine(exe, "--port=4545");
    process.copyOutputTo(System.out);
    process.executeAsync();
    System.out.println("waitUntilAvailable " + waitUntilAvailable(process));

    Thread.sleep(30000);
  }

  private boolean waitUntilAvailable(CommandLine process) throws MalformedURLException, InterruptedException, ExecutionException, TimeoutException {
    ExecutorService service = Executors.newFixedThreadPool(2);

    URL statusUrl = new URL("http://localhost:4545/status");
    CompletableFuture<Boolean> status = new CompletableFuture<>();

    Future<?> serverStarted = service.submit(() -> {
      try {
        new UrlChecker().waitUntilAvailable(10000, TimeUnit.MILLISECONDS, statusUrl);
        System.out.println("serverStarted done");
        status.complete(true);
      } catch (UrlChecker.TimeoutException e) {
        System.out.println("serverStarted timeout");
        throw new WebDriverException("Timed out waiting for driver server to start.", e);
      }
    });

    Future<?> processFinished = service.submit(() -> {
      try {
        process.waitFor(10000);
        System.out.println("processFinished done");
        status.complete(false);
      } catch (WebDriverException ex) {
        ex.printStackTrace();
      }
    });

    boolean result = status.get(20, TimeUnit.SECONDS);
    if (result) {
      processFinished.cancel(true);
    } else {
      serverStarted.cancel(true);
    }
    service.shutdown();
    return result;
  }
}