* The key is the rule string, and the value is a pair containing the client name and compiled pattern.
     */
    protected ConcurrentHashMap<String, Pair<String, Pattern>> clientRuleCache = new ConcurrentHashMap<>();

    /**
     * Determines whether the content at the given URL has been updated since the last crawl.

 * </pre>
 * <p>
 * Alternatively, for high-concurrency scenarios, consider implementing a custom
 * LRU cache using {@link java.util.concurrent.ConcurrentHashMap} with an eviction strategy.
 * </p>
 *
 * @author koichik
 * @param <K> the key type
 * @param <V> the value type
 */
public class LruHashMap<K, V> extends LinkedHashMap<K, V> {

```java
package jcifs.internal.smb2.lease;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import jcifs.CIFSContext;

public class LeaseManager {
    private final ConcurrentHashMap<Smb2LeaseKey, LeaseEntry> leases;
    private final ConcurrentHashMap<String, Smb2LeaseKey> pathToLease;
    private final ReadWriteLock lock;

        int threadCount = 10;
        int noncesPerThread = 100;
        ConcurrentHashMap<String, Boolean> allNonces = new ConcurrentHashMap<>();
        CountDownLatch latch = new CountDownLatch(threadCount);
        AtomicInteger collisions = new AtomicInteger(0);

        // When generating nonces concurrently

public class WitnessClient implements AutoCloseable {
    private final InetAddress witnessServer;
    private final int port;
    private final CIFSContext context;
    private final ConcurrentHashMap<String, WitnessRegistration> registrations;
    private final ConcurrentHashMap<String, WitnessNotificationListener> listeners;
    private final ScheduledExecutorService scheduler;
    private final WitnessRpcClient rpcClient;
    

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.io.*;
import java.nio.file.*;

public class PersistentHandleManager {
    private final ConcurrentHashMap<String, HandleInfo> handles;
    private final ConcurrentHashMap<HandleGuid, HandleInfo> guidToHandle;

 */
package jcifs.smb;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2.multichannel;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.slf4j.Logger;

    private volatile boolean shutdown = false;

    // Event statistics
    private final Map<EventType, AtomicLong> eventCounters = new ConcurrentHashMap<>();
    private final Map<EventType, AtomicLong> eventTimings = new ConcurrentHashMap<>();

    // Configuration
    private volatile boolean enableJsonLogging = true;
    private volatile boolean maskSensitiveData = true;

    /**
     * Tika config.
     */
    protected TikaConfig tikaConfig;

    private final Map<String, TesseractOCRConfig> tesseractOCRConfigMap = new ConcurrentHashMap<>();

    private final Map<String, PDFParserConfig> pdfParserConfigMap = new ConcurrentHashMap<>();

    /**
     * Creates a new TikaExtractor instance.
     */
    public TikaExtractor() {
        super();
    }

    /**