* entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of

            }
        }
    }

    /**
     * Cleans up the crawled data for a given session.
     * Deletes URL queue data and access result data, and clears the URL filter.
     * @param sessionId The session ID to clean up.
     */
    public void cleanup(final String sessionId) {
        if (logger.isInfoEnabled()) {
            logger.info("Starting crawler cleanup: sessionId={}", sessionId);
        }
        try {

  }

  @CanIgnoreReturnValue
  final @Nullable V remove(Object key) {
    checkNotNull(key);
    clearCache();
    return backingMap.remove(key);
  }

  final void clear() {
    clearCache();
    backingMap.clear();
  }

  @Nullable V get(Object key) {
    checkNotNull(key);
    V value = getIfCached(key);
    // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.

                this.state = 6;
                cleanupThread(timeout);
            }
        }
    }

    /**
     * Cleans up the transport thread.
     *
     * @param timeout the maximum time to wait for thread cleanup in milliseconds
     * @throws TransportException if thread cleanup fails
     */
    private synchronized void cleanupThread(final long timeout) throws TransportException {

        }
    }

    /**
     * Clears all session contexts (for cleanup).
     */
    public void cleanup() {
        for (PreauthIntegrityContext context : sessionContexts.values()) {
            context.invalidate();
        }
        sessionContexts.clear();
        log.debug("Cleaned up all preauth integrity contexts");
    }

    }

    /**
     * Test for close() with resource cleanup.
     * Verifies that close properly cleans up resources.
     */
    @Test
    void testClose_withResourceCleanup() {
        // Create a mock that simulates resource cleanup
        doAnswer(invocation -> {
            // Simulate cleanup actions
            return null;
        }).when(smbTree).close();

     * initial thread's.
     */
    Set<Throwable> seenExceptionsLocal = seenExceptionsField;
    if (seenExceptionsLocal == null) {
      // TODO(cpovirk): Should we use a simpler (presumably cheaper) data structure?
      /*
       * Using weak references here could let us release exceptions earlier, but:
       *
       * 1. On Android, querying a WeakReference blocks if the GC is doing an otherwise-concurrent

import org.slf4j.LoggerFactory;

/**
 * Secure key management for SMB encryption.
 * Provides centralized management of encryption keys with secure storage and cleanup.
 *
 * Features:
 * - Secure key storage with optional KeyStore integration
 * - Automatic key cleanup on close
 * - Thread-safe key management
 * - Key derivation utilities
 * - Memory wiping capabilities
 */
public class SecureKeyManager implements AutoCloseable {

  - [Changelog since v1.22.16](#changelog-since-v12216)
  - [Changes by Kind](#changes-by-kind)
    - [Feature](#feature)
    - [Bug or Regression](#bug-or-regression)
    - [Other (Cleanup or Flake)](#other-cleanup-or-flake)
  - [Dependencies](#dependencies)
    - [Added](#added)
    - [Changed](#changed)
    - [Removed](#removed)
- [v1.22.16](#v12216)
  - [Downloads for v1.22.16](#downloads-for-v12216)

     * Initializes the process management system with default timeout values.
     */
    public ProcessHelper() {
        // Default constructor
    }

    /**
     * Cleanup method called when the bean is destroyed.
     * Stops all running processes and cleans up resources.
     */
    @PreDestroy
    public void destroy() {
        for (final String sessionId : runningProcessMap.keySet()) {
            if (logger.isInfoEnabled()) {