private ScheduledFuture<?> cleanupTask;
    private volatile boolean shutdownInProgress = false;

    // Configuration
    private long maxResourceAge = TimeUnit.HOURS.toMillis(1); // 1 hour default
    private long cleanupInterval = TimeUnit.MINUTES.toMillis(5); // 5 minutes default
    private boolean leakDetectionEnabled = true;
    private boolean autoCleanupEnabled = true;

    /**

 * maximumSize}, {@link #maximumWeight(long) maximumWeight}, {@link #expireAfterWrite
 * expireAfterWrite}, {@link #expireAfterAccess expireAfterAccess}, {@link #weakKeys weakKeys},
 * {@link #weakValues weakValues}, or {@link #softValues softValues} are requested.
 *
 * <p>If {@link #maximumSize(long) maximumSize} or {@link #maximumWeight(long) maximumWeight} is

  public void putLast(E e) throws InterruptedException {
    delegate().putLast(e);
  }

  @Override
  public boolean offerFirst(E e, long timeout, TimeUnit unit) throws InterruptedException {
    return delegate().offerFirst(e, timeout, unit);
  }

  @Override
  public boolean offerLast(E e, long timeout, TimeUnit unit) throws InterruptedException {
    return delegate().offerLast(e, timeout, unit);
  }

  @Override

    return (int) links[entry];
  }

  private void setSuccessor(int entry, int succ) {
    long succMask = (~0L) >>> 32;
    links[entry] = (links[entry] & ~succMask) | (succ & succMask);
  }

  private void setPredecessor(int entry, int pred) {
    long predMask = (~0L) << 32;
    links[entry] = (links[entry] & ~predMask) | ((long) pred << 32);
  }

  private void setSucceeds(int pred, int succ) {

        final char[] c = new char[size];
        toHexChars(val, c, 0, size);
        return new String(c);
    }

    /**
     * Converts a long value to a hexadecimal string representation with specified padding.
     *
     * @param val the long value to convert to hexadecimal
     * @param size the desired length of the resulting hex string (will be left-padded with zeros)

    private static class TestSystemHelper extends SystemHelper {
        long processingTime = 0;
        long currentTime = System.currentTimeMillis();

        @Override
        public boolean calibrateCpuLoad() {
            // Do nothing
            return true;
        }

        @Override
        public long getCurrentTimeAsLong() {
            long time = currentTime;
            currentTime += processingTime;

    @Test
    @DisplayName("Test Response interface methods - getExpiration")
    void testGetExpiration() {
        // Given
        Long expectedExpiration = System.currentTimeMillis() + 30000L;
        when(response.getExpiration()).thenReturn(expectedExpiration);

        // When
        Long actualExpiration = response.getExpiration();

        // Then
        assertEquals(expectedExpiration, actualExpiration);

      "scriptData": {
        "type": "keyword"
      },
      "scriptResult": {
        "type": "keyword"
      },
      "lastUpdated": {
        "type": "long"
      },
      "startTime": {
        "type": "long"
      },
      "endTime": {
        "type": "long"
      }
    }

    private transient Object lock = new Object();

    final Supplier<T> delegate;
    final long durationNanos;
    transient volatile @Nullable T value;
    // The special value 0 means "not yet initialized".
    transient volatile long expirationNanos;

    ExpiringMemoizingSupplier(Supplier<T> delegate, long durationNanos) {
      this.delegate = delegate;
      this.durationNanos = durationNanos;
    }

    /** Total execution time for all operations */
    protected volatile long executeTime = 0;

    /** List of documents waiting to be indexed */
    protected final DocList docList = new DocList();

    /** Maximum size of document requests in bytes */
    protected long maxDocumentRequestSize;

    /** Maximum number of documents to cache before indexing */