CustomKeyManagerFactory.java

  public void customKeyManagerFactory() {
    Vertx vertx = Vertx.vertx();
    vertx.createHttpServer(new HttpServerOptions().setKeyCertOptions(new KeyCertOptions() {
      @Override
      public KeyManagerFactory getKeyManagerFactory(Vertx vertx) throws Exception {
        throw new UnsupportedOperationException("Implement me");
      }
      @Override
      public KeyCertOptions clone() {
        throw new UnsupportedOperationException("Implement me");
      }
    })).requestHandler(req -> {
      
    }).listen();
  }