* It manages the crawling lifecycle, including initialization, execution coordination,
 * monitoring, and cleanup operations.
 *
 * <p>The crawler can operate in different modes based on command-line options:
 * <ul>
 * <li>Web crawling - crawls web sites and web content</li>
 * <li>File system crawling - crawls file systems and documents</li>

/**
 * API action for admin file configuration management.
 * Provides RESTful API endpoints for managing file crawling configuration settings in the Fess search engine.
 * File configurations define settings for crawling file systems, FTP servers, and other file-based data sources.
 *
 */
public class ApiAdminFileconfigAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminFileconfigAction.class);

  static final boolean GENERATE_CANCELLATION_CAUSES;

  static {
    // System.getProperty may throw if the security policy does not permit access.
    boolean generateCancellationCauses;
    try {
      generateCancellationCauses =
          parseBoolean(System.getProperty("guava.concurrent.generate_cancellation_cause", "false"));
    } catch (SecurityException e) {

  static final boolean GENERATE_CANCELLATION_CAUSES;

  static {
    // System.getProperty may throw if the security policy does not permit access.
    boolean generateCancellationCauses;
    try {
      generateCancellationCauses =
          parseBoolean(System.getProperty("guava.concurrent.generate_cancellation_cause", "false"));
    } catch (SecurityException e) {

 * <li>Incremental crawling support with last-modified timestamp checking</li>
 * <li>Document expiration handling</li>
 * <li>Child URL extraction and queueing</li>
 * <li>Integration with Fess configuration and permission systems</li>
 * <li>Client selection based on URL patterns</li>
 * </ul>
 *
 * @see CrawlerThread
 * @see org.codelibs.fess.crawler.client.CrawlerClient
 */
public class FessCrawlerThread extends CrawlerThread {

 * - Scroll search for large result sets
 * - Document retrieval by ID
 * - Bulk document updates
 * - Search parameter serialization/deserialization for cookies
 * - Integration with search engines and logging systems
 */
public class SearchHelper {

    // ===================================================================================
    //                                                                            Constant

# Test system properties

		<packaging.fess.group>fess</packaging.fess.group>
		<packaging.fess.pid.dir>/var/run/fess</packaging.fess.pid.dir>
		<packaging.fess.systemd.dir>/usr/lib/systemd/system</packaging.fess.systemd.dir>
		<packaging.fess.systemd.sysctl.dir>/usr/lib/sysctl.d</packaging.fess.systemd.sysctl.dir>
		<packaging.fess.tmpfilesd.dir>/usr/lib/tmpfiles.d</packaging.fess.tmpfilesd.dir>

    }

    // Test system property override
    public void test_get_systemPropertyOverride() {
        // Set system property that should override config
        String testKey = "test.property";
        String systemValue = "system-value";
        System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, systemValue);

        try {
            // Test that system property takes precedence

        System.out.printf("%.2f Executing call.%n", (System.nanoTime() - startNanos) / 1e9f)
        try {
          call.execute().use { response ->
            System.out.printf("%.2f Call was expected to fail, but completed: %s%n",
                (System.nanoTime() - startNanos) / 1e9f, response)
          }
        } catch (e: IOException) {
          System.out.printf("%.2f Call failed as expected: %s%n",