* the thread waits until the delay has elapsed.
 * This class is thread-safe.
 * The cache automatically evicts entries after 1 hour of inactivity to prevent memory leaks.
 */
public class HostIntervalController extends DefaultIntervalController {

    /** Default cache expire duration in hours */
    private static final long DEFAULT_CACHE_EXPIRE_HOURS = 1L;

    /** Cache storing the last access time for each host. */