import org.codelibs.fess.crawler.entity.UrlQueueImpl;
import org.codelibs.fess.crawler.helper.MemoryDataHelper;
import org.codelibs.fess.crawler.service.UrlQueueService;

import jakarta.annotation.Resource;

/**
 * Implementation of the {@link UrlQueueService} interface.
 * This class provides methods for managing a queue of URLs to be crawled,
 * including adding, deleting, and retrieving URLs from the queue.

import org.codelibs.fess.opensearch.config.exentity.DuplicateHost;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing duplicate host configuration CRUD operations.
 * This service provides functionality to create, read, update, and delete

import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.opensearch.config.exentity.DuplicateHost;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin duplicate host management.
 * Provides RESTful API endpoints for managing duplicate host settings in the Fess search engine.

import org.codelibs.fess.dict.synonym.SynonymItem;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;
import org.lastaflute.web.response.StreamResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin Synonym dictionary management.
 * Provides REST endpoints for managing synonym dictionary items in the Fess search engine.
 */

import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.MaxLengthExceededException;

import jakarta.annotation.Resource;

/**
 * Abstract base class for CrawlerClient implementations.
 * Provides common functionality for handling initialization parameters,
 * content length checks, and default method implementations.

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.net.URLUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.annotation.Secured;
import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.base.FessAdminAction;
import org.codelibs.fess.entity.SearchRenderData;
import org.codelibs.fess.exception.InvalidQueryException;

import org.codelibs.fess.opensearch.config.exentity.WebConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin web configuration management.
 *
 */
public class ApiAdminWebconfigAction extends FessApiAdminAction {

    /** The logger for this class. */

import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.ResourceUtil;
import org.opensearch.index.query.QueryBuilders;

import com.google.common.collect.Lists;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;

/**
 * Manager class for handling thumbnail generation and management.
 * Provides functionality to generate, cache, and serve thumbnail images for documents.
 */

import org.lastaflute.di.core.factory.SingletonLaContainerFactory;
import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.monitor.os.OsProbe;
import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * Executable class for generating thumbnails for indexed documents.
 * This class provides a command-line interface for thumbnail generation tasks.
 */
public class ThumbnailGenerator {

import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.opensearch.config.exentity.RequestHeader;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin request header management.
 *
 */
public class ApiAdminReqheaderAction extends FessApiAdminAction {

    /** The logger for this class. */