new String[] { SuggestConstants.DEFAULT_ROLE }, new String[] { "en" }, SuggestItem.Kind.QUERY);

        suggester.indexer().index(items);
        suggester.refresh();

        PopularWordsResponse response = suggester.popularWords().setSize(10).addLanguage("en").execute().getResponse();

        assertNotNull(response);

        final Suggester suggester = Suggester.builder().build(runner.client(), id);

        assertNotNull(suggester);
        assertNotNull(suggester.client);
        assertNotNull(suggester.indexer());
        assertNotNull(suggester.getNormalizer());
        assertNotNull(suggester.getReadingConverter());
        assertNotNull(suggester.settings());
        assertTrue(!Strings.isNullOrEmpty(suggester.index));
    }

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.indexer;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

                    new String[] { "tag1" }, new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY);
        }
        suggester.indexer().index(items);
        suggester.refresh();
    }

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.indexer;

import java.util.Map;

import org.codelibs.fess.Constants;
import org.codelibs.fess.opensearch.config.exentity.BoostDocumentRule;
import org.codelibs.fess.util.ComponentUtil;

/**

---

## Key Components

### Suggester (Main Entry Point)
Location: `src/main/java/org/codelibs/fess/suggest/Suggester.java`

Main operations: `suggest()`, `popularWords()`, `indexer()`, `createIndexIfNothing()`, `createNextIndex()`, `switchIndex()`, `removeDisableIndices()`

### SuggestIndexer (Indexing Engine)
Location: `src/main/java/org/codelibs/fess/suggest/index/SuggestIndexer.java`

 *   <li>{@link #switchIndex()}: Switches the search alias to the current update index.</li>
 *   <li>{@link #removeDisableIndices()}: Removes disabled indices.</li>
 *   <li>{@link #indexer()}: Creates a new SuggestIndexer for indexing suggestions.</li>
 *   <li>{@link #builder()}: Creates a new SuggesterBuilder for building Suggester instances.</li>
 *   <li>{@link #settings()}: Returns the SuggestSettings instance.</li>

import org.codelibs.fess.crawler.service.impl.OpenSearchUrlFilterService;
import org.codelibs.fess.crawler.service.impl.OpenSearchUrlQueueService;
import org.codelibs.fess.indexer.IndexUpdater;
import org.codelibs.fess.opensearch.config.exbhv.BoostDocumentRuleBhv;
import org.codelibs.fess.opensearch.config.exentity.BoostDocumentRule;

3. Creates language-specific fields (e.g., `content_ja`, `title_en`, `content_sv`)
4. Applies language-specific analyzers for better search results

Configured in `fess_config.properties`:
```properties
indexer.language.fields=content,important_content,title
```

## Optional: Search Analysis Support

If your language requires special text analysis (stemming, stop words, etc.), you may need to configure OpenSearch analyzers.

import org.codelibs.fess.helper.UserAgentHelper;
import org.codelibs.fess.helper.UserInfoHelper;
import org.codelibs.fess.helper.ViewHelper;
import org.codelibs.fess.helper.VirtualHostHelper;
import org.codelibs.fess.indexer.IndexUpdater;
import org.codelibs.fess.ingest.IngestFactory;
import org.codelibs.fess.job.JobExecutor;
import org.codelibs.fess.ldap.LdapManager;
import org.codelibs.fess.mylasta.direction.FessConfig;