client.setCrawlerClient(testClient);
        client.setRequestListener(testListener);
        final String url = "http://test.com/";
        final ResponseData response = client.execute(RequestDataBuilder.newRequestData().get().url(url).build());
        assertEquals(1, testListener.startCount);
        assertEquals(1, testListener.requestCount);
        assertEquals(0, testListener.exceptionCount);

        runner.close();
        runner.clean();
    }

    @Before
    public void before() throws Exception {
        try {
            runner.admin().indices().prepareDelete("_all").execute().actionGet();
        } catch (IndexNotFoundException ignore) {

        }
        runner.refresh();
        settings = Suggester.builder().build(runner.client(), id).settings();
    }

    @Test

    }

    /**
     * Executes the HTTP client request.
     *
     * @param httpRequest The HTTP request to execute
     * @return The HTTP response
     * @throws IOException If an I/O error occurs
     */
    protected HttpResponse executeHttpClient(final HttpUriRequest httpRequest) throws IOException {
        return httpClient.execute(httpRequest, new BasicHttpContext(httpClientContext));
    }

    .execute()
    .getResponse();

// Process suggestions
response.getItems().forEach(item -> {
    System.out.println("Suggestion: " + item.getText()[0]);
    System.out.println("Score: " + item.getScore());
});
```

#### 4. Asynchronous Suggestions

```java
suggester.suggest()
    .setQuery("sea")
    .execute()
    .done(response -> {

import jakarta.annotation.Resource;

/**
 * The {@code CrawlerThread} class represents a thread that executes the crawling process.
 * It is responsible for fetching URLs from the queue, accessing the content,
 * processing the response, and extracting child URLs.
 *
 * <p>
 * This class implements the {@link Runnable} interface, allowing it to be executed in a separate thread.

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.suggest;

import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.codelibs.fess.suggest.analysis.SuggestAnalyzer;
import org.codelibs.fess.suggest.converter.ReadingConverter;
import org.codelibs.fess.suggest.exception.SuggesterException;

 *   It is similar to a Promise in JavaScript.
 *   It allows you to register callbacks that will be executed when the computation is complete,
 *   either successfully (resolve) or with an error (reject).
 * </p>
 *
 * <p>
 *   The Deferred class has a Promise inner class that allows you to register callbacks
 *   to be executed when the computation is complete.

            crawler2.getCrawlerContext().setMaxAccessCount(maxCount);
            crawler2.getCrawlerContext().setNumOfThread(numOfThread);

            final String sessionId1 = crawler1.execute();
            final String sessionId2 = crawler2.execute();

            assertNotSame(sessionId1, sessionId2);
            assertNotSame(crawler1.crawlerContext, crawler2.crawlerContext);

                bulkRequestBuilder.add(indexRequestBuilder);
            }
        }

        final BulkResponse response = bulkRequestBuilder.execute().actionGet(settings.getBulkTimeout());
        final SuggestWriterResult result = new SuggestWriterResult();
        if (response.hasFailures()) {
            for (final BulkItemResponse bulkItemResponses : response.getItems()) {

                    .setId(id)
                    .setDocAsUpsert(true)
                    .setDoc(builder)
                    .execute()
                    .actionGet(settings.getIndexTimeout());
            client.admin().indices().prepareRefresh().setIndices(actualIndex).execute().actionGet(settings.getIndicesTimeout());
        } catch (final Exception e) {