/** Use {@link MoreExecutors#newSequentialExecutor} */
  SequentialExecutor(Executor executor) {
    this.executor = Preconditions.checkNotNull(executor);
  }

  /**
   * Adds a task to the queue and makes sure a worker thread is running.
   *
   * <p>If this method throws, e.g. a {@code RejectedExecutionException} from the delegate executor,
   * execution of tasks will stop until a call to this method is made.
   */

            runCalled.getAndIncrement();
          }
        },
        directExecutor());
    Runnable execute =
        new Runnable() {
          @Override
          public void run() {
            list.execute();
          }
        };
    Thread thread1 = new Thread(execute);
    Thread thread2 = new Thread(execute);
    thread1.start();
    thread2.start();
    assertEquals(0, runCalled.get());

    //                                                                      Search Execute
    //                                                                      ==============
    /**
     * Displays the label type list page.
     *
     * @param form the search form
     * @return HTML response for the list page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })

        .header("User-Agent", "SyncApiTest")
        .build()
    val call = client.newCall(request)
    val response = call.execute()
    response.body.close()
    assertFailsWith<IllegalStateException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Already Executed")
    }
    assertFailsWith<IllegalStateException> {
      call.enqueue(callback)
    }.also { expected ->

              }
            }
          };
      executor.execute(errorTask);
      service.execute(barrierTask); // submit directly to the service
      // the barrier task runs after the error task so we know that the error has been observed by
      // SequentialExecutor by the time the barrier is satisfied
      barrier.await(1, SECONDS);
      executor.execute(barrierTask);
      // timeout means the second task wasn't even tried

    //                                                                      Search Execute
    //                                                                      ==============
    /**
     * Display the stopwords index page.
     *
     * @param form the search form
     * @return HTML response for the index page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index(final SearchForm form) {

            final ActionType<Response> action, final Request request) {
        return client.execute(action, request);
    }

    /**
     * Executes an action asynchronously with a callback.
     *
     * @param <Request>  the request type
     * @param <Response> the response type
     * @param action     the action to execute

 * guaranteed to execute. There is no guarantee, however, that listeners will be executed in the
 * order that they are added.
 *
 * <p>Exceptions thrown by a listener will be propagated up to the executor. Any exception thrown
 * during {@code Executor.execute} (e.g., a {@code RejectedExecutionException} or an exception

    //                                                                      ==============
    /**
     * Displays the main synonym dictionary index page.
     *
     * @param form the search form containing search criteria
     * @return HTML response for the synonym dictionary index page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })

        assertEquals(1, response.getNum());
        assertEquals("全文 検索", response.getWords().get(0));

        response = suggester.suggest().addKind("query").execute().getResponse();
        assertEquals(1, response.getNum());

        SuggestResponse response2 = suggester.suggest().setSuggestDetail(true).execute().getResponse();