}
            }
        } catch (SocketException e) {
            log.error("Failed to discover local interfaces", e);
        }

        // Sort by score
        localInterfaces.sort((a, b) -> Integer.compare(b.getScore(), a.getScore()));

        log.debug("Discovered {} local network interfaces", localInterfaces.size());
    }

    private boolean canEnableMultiChannel() {

public void initializeWitnessSupport() {
    Configuration config = context.getConfig();
    
    if (!config.isUseWitness()) {
        return;
    }
    
    try {
        // Discover witness service
        InetAddress witnessServer = discoverWitnessService();
        if (witnessServer != null) {
            witnessClient = new WitnessClient(witnessServer, context);
            witnessEnabled = true;

            log.info("Server does not support multi-channel");
            return;
        }
        
        // Query network interfaces from server
        queryRemoteInterfaces();
        
        // Discover local interfaces
        discoverLocalInterfaces();
        
        // Enable multi-channel if we have multiple usable interfaces
        if (canEnableMultiChannel()) {
            multiChannelEnabled = true;

   * - 2 requests happen concurrently to a host that can be coalesced onto a single connection.
   * - Both request discover no existing connection. They both make a connection.
   * - The first request "wins the race".
   * - The second request discovers it "lost the race" and closes the connection it just opened.
   * - The second request uses the coalesced connection from request1.

 *   <li><b>cryptographic:</b> certain hash functions such as {@link Hashing#sha512} are designed to
 *       make it as infeasible as possible to reverse-engineer the input that produced a given hash
 *       code, or even to discover <i>any</i> two distinct inputs that yield the same result. These
 *       are called <i>cryptographic hash functions</i>. But, whenever it is learned that either of

 *   <li><b>cryptographic:</b> certain hash functions such as {@link Hashing#sha512} are designed to
 *       make it as infeasible as possible to reverse-engineer the input that produced a given hash
 *       code, or even to discover <i>any</i> two distinct inputs that yield the same result. These
 *       are called <i>cryptographic hash functions</i>. But, whenever it is learned that either of

import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;

/**
 * Helper class for managing Fess plugins and artifacts.
 * This class provides functionality to discover, install, and manage various types of plugins
 * including data stores, themes, ingest processors, scripts, web applications, thumbnails, and crawlers.
 */
public class PluginHelper {
    /** Logger instance for this class */

        // Test simulating real witness environment scenarios
        // This test validates integration patterns without requiring real cluster

        // Simulate witness service discovery
        InetAddress mockWitnessAddress = InetAddress.getByName("127.0.0.1");

        // Test witness client initialization patterns
        assertDoesNotThrow(() -> {

 *
 * <p>The implementation uses an executor service for concurrent processing of file operations and maintains
 * a cache of URLs to be deleted for batch processing. It handles redirect following and child URL discovery
 * during the crawling process.</p>
 */
public class FileListIndexUpdateCallbackImpl implements IndexUpdateCallback {

    /** Logger for this class. */

    }

    /**
     * Gets the parent URL from which this resource was discovered.
     *
     * @return the parent URL, or null if this is a root URL
     */
    public String getParentUrl() {
        return parentUrl;
    }

    /**
     * Sets the parent URL from which this resource was discovered.
     *
     * @param parentUrl the parent URL to set
     */