* value after the specified time has passed. Subsequent calls to {@code get()} return the cached
   * value if the expiration time has not passed. After the expiration time, a new value is
   * retrieved, cached, and returned. See: <a
   * href="http://en.wikipedia.org/wiki/Memoization">memoization</a>
   *

    private static final DfsReferralDataImpl NEGATIVE_ENTRY = new DfsReferralDataImpl();

    private static class CacheEntry<T> {

        long expiration;
        Map<String, T> map;

        CacheEntry(final long ttl) {
            this.expiration = System.currentTimeMillis() + ttl * 1000L;
            this.map = new ConcurrentHashMap<>();
        }
    }

That way, you can create a token with an expiration of, let's say, 1 week. And then when the user comes back the next day with the token, you know that user is still logged in to your system.

        assertFalse(auth.isExpired());

        // Wait for expiration
        Thread.sleep(150);

        // Should be expired now
        assertTrue(auth.isExpired());

        // Reset timestamp
        auth.resetAuthenticationTimestamp();
        assertFalse(auth.isExpired());

        // Test with no expiration (TTL = 0)
        auth.setAuthenticationTTL(0);
        Thread.sleep(100);

        private final long expiration;

        /**
         * Constructs StateData with nonce and expiration.
         * @param nonce The nonce value.
         * @param expiration The expiration timestamp.
         */
        public StateData(final String nonce, final long expiration) {
            this.nonce = nonce;
            this.expiration = expiration;
        }

        /**

   * value after the specified time has passed. Subsequent calls to {@code get()} return the cached
   * value if the expiration time has not passed. After the expiration time, a new value is
   * retrieved, cached, and returned. See: <a
   * href="http://en.wikipedia.org/wiki/Memoization">memoization</a>
   *

import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Job for purging expired documents from the search index.
 * This job removes documents that have passed their expiration time based on the expires field.
 * It helps maintain the search index by cleaning up outdated content automatically.
 */
public class PurgeDocJob {

    /** Logger instance for this class */

versioning with [object lifecycle management](https://github.com/minio/minio/blob/master/docs/bucket/lifecycle/README.md).  If you have an object expiration lifecycle policy in your non-versioned bucket and you want to maintain the same permanent delete behavior when on versioning-enabled bucket, you must add a noncurrent expiration policy. The noncurrent expiration lifecycle policy will manage the deletes of the noncurrent object versions in the versioning-enabled bucket. (A version-enabled bucket maintains...

    class InheritedMethodsTests {

        @Test
        @DisplayName("Should get expiration")
        void testGetExpiration() {
            long expiration = System.currentTimeMillis() + 60000;

            // Test with mock
            when(mockReferralData.getExpiration()).thenReturn(expiration);
            assertEquals(expiration, mockReferralData.getExpiration());
            verify(mockReferralData, times(1)).getExpiration();

   * CacheBuilder#softValues}.
   */
  COLLECTED {
    @Override
    boolean wasEvicted() {
      return true;
    }
  },

  /**
   * The entry's expiration timestamp has passed. This can occur when using {@link
   * CacheBuilder#expireAfterWrite} or {@link CacheBuilder#expireAfterAccess}.
   */
  EXPIRED {
    @Override
    boolean wasEvicted() {
      return true;