#### Migration Steps

**Step 1: Set Up Fess Crawling**

1. In Fess Admin, create a new Web crawling configuration
2. Add your website URL as the starting point
3. Configure crawl depth and URL patterns
4. Start crawling

**Step 2: Replace JavaScript Code**

Replace existing GSS/CSE code:

```javascript
<!-- Old GSS/CSE Code -->

import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for Crawling Info management.
 *
 */
public class AdminCrawlinginfoAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminCrawlinginfoAction() {
        super();
    }

    public void setSessionIdList(final List<String> sessionIdList) {
        this.sessionIdList = sessionIdList;
    }

    /**
     * Sets the flag indicating whether crawling should be finished.
     *
     * @param finishCrawling true if crawling should be finished, false otherwise
     */
    public void setFinishCrawling(final boolean finishCrawling) {
        this.finishCrawling = finishCrawling;
    }

    /**

import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing failure URLs that occur during web crawling.
 * Provides functionality to store, retrieve, and manage failed crawling attempts
 * with their associated error information.
 */
public class FailureUrlService {

    /** Logger instance for this class */

labels.depth=Tiefe
labels.excludedPaths=Ausgeschlossene Pfade für das Crawling
labels.excludedUrls=Ausgeschlossene URLs für das Crawling
labels.excludedDocPaths=Ausgeschlossene Pfade für die Suche
labels.excludedDocUrls=Ausgeschlossene URLs für die Suche
labels.hostname=Hostname
labels.id=ID
labels.includedPaths=Eingeschlossene Pfade für das Crawling
labels.includedUrls=Eingeschlossene URLs für das Crawling
labels.includedDocPaths=Eingeschlossene Pfade für die Suche

        }
    }

    /**
     * Processes a crawling request for a specific URL.
     * Executes the full crawling pipeline including client execution, rule processing,
     * transformation, and data extraction.
     *
     * @param crawlingConfig the crawling configuration to use
     * @param crawlingInfoId the crawling session ID
     * @param url the URL to process

import java.util.Objects;

import org.codelibs.fess.crawler.Constants;

/**
 * Represents a request data for crawling.
 * This class encapsulates the HTTP method, URL, and weight associated with a crawling request.
 */
public class RequestData {
    /**
     * HTTP methods supported for crawling requests.
     */
    public enum Method {
        /** HTTP GET method. */
        GET,
        /** HTTP POST method. */

 * This class extends the base CrawlerThread and provides Fess-specific functionality for
 * crawling and indexing documents, including incremental crawling capabilities, content
 * modification checking, and integration with the Fess search engine backend.
 *
 * <p>Key features include:</p>
 * <ul>
 * <li>Incremental crawling support with last-modified timestamp checking</li>
 * <li>Document expiration handling</li>

import org.codelibs.fess.app.web.admin.crawlinginfo.EditForm;

/**
 * Request body class for crawling info edit operations in the admin REST API.
 * This class extends EditForm to inherit the necessary form validation and binding capabilities
 * for crawling information management operations.
 */
public class EditBody extends EditForm {

    /**
     * Default constructor.
     */

/**
 * The ResponseProcessor interface defines a contract for processing response data.
 * Implementations of this interface are responsible for handling the response data
 * obtained during a crawling process.
 */
public interface ResponseProcessor {

    /**
     * Processes the given response data.
     *
     * @param responseData the response data to be processed
     */